EJB relation One to Many - ClassCastException
Hi !
I created two CMP EJB entity Client and Address. There is a One to Many relation between them.
When I deploy them on JBoss, I have no errors, and the correponding tables are created in the database. The EJB seems to work fine, but when I use a 'relation' method : myAddress.setClient(myClient) for instance. I get a ServerException.
In the log of JBoss there is :
ClassCastException : org.jboss.ejb.plugins.cmp.jdbc.bridge.JDBCCMRFieldBridge.SetInstanceValue(...)
I think I have a problem in my descriptors or JBoss configuration.
If u have an idea ...
Thx
sorry to whack a load of code in but i can't see where the problem is here is my ejb-jar.xml file:
<ejb-jar>
<enterprise-beans>
<entity>
<description>This bean represents a copy item.</description>
<ejb-name>CopyEJB</ejb-name>
<home>com.RemoteCopyHome</home>
<remote>com.RemoteCopy</remote>
<local-home>com.LocalCopyHome</local-home>
<local>com.LocalCopy</local>
<ejb-class>com.CopyBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Copy</abstract-schema-name>
<cmp-field>
<field-name>copyid</field-name>
</cmp-field>
<cmp-field>
<field-name>quality</field-name>
</cmp-field>
<cmp-field>
<field-name>buyinprice</field-name>
</cmp-field>
<cmp-field>
<field-name>selloutprice</field-name>
</cmp-field>
<cmp-field>
<field-name>bookid</field-name>
</cmp-field>
<cmp-field>
<field-name>title</field-name>
</cmp-field>
<cmp-field>
<field-name>genre</field-name>
</cmp-field>
<primkey-field>copyid</primkey-field>
<security-identity>
<description></description>
<use-caller-identity></use-caller-identity>
</security-identity>
</entity>
<entity>
<description>This bean represents a supplier.</description>
<ejb-name>SupplierEJB</ejb-name>
<home>com.RemoteSupplierHome</home>
<remote>com.RemoteSupplier</remote>
<local-home>com.LocalSupplierHome</local-home>
<local>com.LocalSupplier</local>
<ejb-class>com.SupplierBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Supplier</abstract-schema-name>
<cmp-field>
<field-name>supplierid</field-name>
</cmp-field>
<cmp-field>
<field-name>name</field-name>
</cmp-field>
<cmp-field>
<field-name>address1</field-name>
</cmp-field>
<cmp-field>
<field-name>address2</field-name>
</cmp-field>
<cmp-field>
<field-name>address3</field-name>
</cmp-field>
<cmp-field>
<field-name>address4</field-name>
</cmp-field>
<cmp-field>
<field-name>postcode</field-name>
</cmp-field>
<cmp-field>
<field-name>email</field-name>
</cmp-field>
<cmp-field>
<field-name>telno</field-name>
</cmp-field>
<primkey-field>supplierid</primkey-field>
<security-identity>
<description></description>
<use-caller-identity></use-caller-identity>
</security-identity>
</entity>
<entity>
<description>This bean represents an edition.</description>
<ejb-name>EditionEJB</ejb-name>
<home>com.RemoteEditionHome</home>
<remote>com.RemoteEdition</remote>
<local-home>com.LocalEditionHome</local-home>
<local>com.LocalEdition</local>
<ejb-class>com.EditionBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Edition</abstract-schema-name>
<cmp-field>
<field-name>editionid</field-name>
</cmp-field>
<cmp-field>
<field-name>isbn</field-name>
</cmp-field>
<cmp-field>
<field-name>publisher</field-name>
</cmp-field>
<cmp-field>
<field-name>binding</field-name>
</cmp-field>
<cmp-field>
<field-name>other</field-name>
</cmp-field>
<cmp-field>
<field-name>edition</field-name>
</cmp-field>
<cmp-field>
<field-name>printdate</field-name>
</cmp-field>
<primkey-field>editionid</primkey-field>
<security-identity>
<description></description>
<use-caller-identity></use-caller-identity>
</security-identity>
</entity>
<entity>
<description>This bean represents an author.</description>
<ejb-name>AuthorEJB</ejb-name>
<home>com.RemoteAuthorHome</home>
<remote>com.RemoteAuthor</remote>
<local-home>com.LocalAuthorHome</local-home>
<local>com.LocalAuthor</local>
<ejb-class>com.AuthorBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>False</reentrant>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Author</abstract-schema-name>
<cmp-field>
<field-name>authorid</field-name>
</cmp-field>
<cmp-field>
<field-name>name</field-name>
</cmp-field>
<primkey-field>authorid</primkey-field>
<security-identity>
<description></description>
<use-caller-identity></use-caller-identity>
</security-identity>
</entity>
<session>
<description>Supplier Function Session Bean</description>
<display-name>SupplierFunctionEJB</display-name>
<ejb-name>SupplierFunctionEJB</ejb-name>
<home>com.SupplierFunctionHome</home>
<remote>com.SupplierFunctionRemote</remote>
<ejb-class>com.SupplierFunctionSBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
<session>
<description>Copy Function Session Bean</description>
<display-name>CopyFunctionEJB</display-name>
<ejb-name>CopyFunctionEJB</ejb-name>
<home>com.CopyFunctionHome</home>
<remote>com.CopyFunctionRemote</remote>
<ejb-class>com.CopyFunctionSBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
</session>
</enterprise-beans>
<relationships>
<ejb-relation>
<ejb-relation-name>Supplier-Copy</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>copy-recievedfrom-supplier</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<cascade-delete></cascade-delete>
<relationship-role-source>
<ejb-name>CopyEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>supplier</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>supplier-has-items</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>SupplierEJB</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
</ejb-relation>
<ejb-relation>
<ejb-relation-name>Edition-Copy</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>edition-has-items</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>EditionEJB</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>copy-is-a-edition</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<cascade-delete></cascade-delete>
<relationship-role-source>
<ejb-name>CopyEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>edition</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
</ejb-relation>
<!--<ejb-relation>
<ejb-relation-name>Author-Copy</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>copy-has-items</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<relationship-role-source>
<ejb-name>AuthorEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>copies</cmr-field-name>
<cmr-field-type>java.util.Set</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>copy-has-authors</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<cascade-delete></cascade-delete>
<relationship-role-source>
<ejb-name>CopyEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>authors</cmr-field-name>
<cmr-field-type>java.util.Set</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
</ejb-relation>-->
</relationships>
<assembly-descriptor>
<security-role>
<description>This role represents everyone who is allowed full access
to the beans.</description>
<role-name>Subscribers</role-name>
</security-role>
<method-permission>
<role-name>Subscribers</role-name>
<method>
<ejb-name>CopyEJB</ejb-name>
<method-name>*</method-name>
</method>
<method>
<ejb-name>SupplierEJB</ejb-name>
<method-name>*</method-name>
</method>
</method-permission>
<container-transaction>
<method>
<ejb-name>CopyEJB</ejb-name>
<method-name>*</method-name>
</method>
<method>
<ejb-name>SupplierEJB</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>my session bean code can be found at
http://saloon.javaranch.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic&f=11&t=006578
Similar Messages
-
Understanding objects relations one-to-many and many-to-many with flex4
Hello, I'm a newbie on Flex 4.
I read several examples and also the "one week training". What I couldn't find is how to manage relations among objects.
I understood that objects coming from the server must be translated to value objects.
Because I'm working with Spring, Hibernate and BlazeDS, I've several beans and relations defined with the annotations @OneToMany and @ManyToMany. These relations are managed using List, Set and Map objects.
More precisaly, I've to create a flex datagrid, each row is an "author" objects. Cliccking a row, I need to load some other related objects (let's call them "documents").
Auhtor and Documents objects are in a one-to-many relation.
My questions are:
1) Which is the correct way to handle related objects in Flex? This questions arise from the fact that there are two ways in order to manage such objects. The first is to load the parent object and them call related method in order to get child. For example author.getDocuments(). I get all the related objects (author+ all his documents) with just one call, the one to load the "author" object. BlazeDS doesn't support lazy loading.
The second way, is to provide the parent ID to a method that loads the related objects. For example getDocuments(authorID). I need to make a query for each ID
Obviously, the value objects we have to create with AS are different. In the first case, the author VO will have a ArrayCollection in order to manage documents.In the second case I'll not create this property.
2) In Flex, which is the best way? is it possible to manage objects (documents) of objects (authors) with MXML?
3) More in general, Flex experts people, what are used to do? Where I can find an example?
Thank you
PaoloThank you Pablo.
Regarding my question n.2, it is confused.
Here what I meant:
Let's suppose I work with VO and ArrayCollection (the first "way" I wrote above). To get "Documents" objects, I need to call author.getDocuments().
Now, I'm not sure that I'm able to do the same with MXML and that is is the easiest way. I think it should be easier working with "Documents" object instead of Auhors in order to work with Documents.
For example, in order to get autors I can write a CallResponder and use a token. To fill a datagrid I define a method like
protected function dataGrid_creationCompleteHandler(event:Flex:Event):void
getAuthorsResult.token = auhtorService.getAuthors();}
Now in order to fill the grid, I can use for example <mx:DataGridColumn dataField="lastname">. Very easy and clear.
But now, if I need to extract the Document objects and visualize them inside anothee DataGrid, I don't know how to do.
For example, in <mx:DataGridColumn> tag what I've to write in order to visualize a Document property, using an Author object?
Fixing an Auhtor, I need to loop over each Documents, but how can I loop inside the MXML? Something like <mx:DataGridColum dataField="author.documentloopvariable....>
It should be better to get Documents via a method like getDocuments(authorID). Now I get a token related to a CallResponder, and I can work at the same manner as the Author. Isn't it? But this is the second "way" I wrote above.
Well, I hope my question in a little clear.
thank you
Pbesi -
One to many relationships in EJB
I have two EBs related by a one to many relationship. The first of these tables is called Student and has studentId as its key. The second of the tables has a composite key made up of studentID, courseID and semesterID.
However, when the tables are generated in NetBeans 5.5, I find that the Course table has studentID as both a primary key and a foreign key.
I am at a loss to understand this as I am new to NetBeans and EJB.
Can anyone advise?
Thanks
Martin O'Shea.
The Student class:
package CBSD_CW;
import java.io.Serializable;
import javax.persistence.*;
import java.util.*;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Student_EB implements Serializable {
// Table columns.
@Id
@Column(name = "STUDENT_ID", nullable = false)
private Long studentId; // Student ID. Entity <Student><ID> from file: SampleData.xml.
@Column(name = "FIRST_NAME", length = 50, nullable = true)
private String firstName; // First Name. Entity <Student><FirstName> from file: SampleData.xml.
@Column(name = "LAST_NAME", length = 50, nullable = true)
private String lastName; // Last Name. Entity <Student><LastName> from file: SampleData.xml.
@Column(name = "STUDENT_LEVEL", length = 2, nullable = true)
private String studentLevel; // Student Level. Entity <Student><Level> from file: SampleData.xml.
@Column(name = "PROGRAM_NAME", length = 50, nullable = true)
private String programName; // Program Name. Entity <Student><ProgramName> from file: SampleData.xml.
@Column(name = "PROGRAM_NUMBER", length = 3, nullable = true)
private String programNumber; // Program Number. Entity <Student><ProgramNumber> from file: SampleData.xml.
// 1:M relationship with Course_EB.
@OneToMany(cascade=CascadeType.ALL, mappedBy="student")
private List<Course_EB> courses;
public List<Course_EB> getCourses() {
return courses;
public void setCourses(List<Course_EB> courses) {
this.courses = courses;
// Accessors and mutators.
public Long getId() {
return this.studentId;
public void setId(Long studentId) {
this.studentId = studentId;
public String getFirstName() {
return firstName;
public void setFirstName(String firstName) {
this.firstName = firstName;
public String getLastName() {
return lastName;
public void setLastName(String lastName) {
this.lastName = lastName;
public String getStudentLevel() {
return studentLevel;
public void setStudentLevel(String studentLevel) {
this.studentLevel = studentLevel;
public String getProgramName() {
return programName;
public void setProgramName(String programName) {
this.programName = programName;
public String getProgramNumber() {
return programNumber;
public void setProgramNumber(String programNumber) {
this.programNumber = programNumber;
// Other methods.
public boolean equals(Object obj) {
if (obj == this) {
return (true);
if (!(obj instanceof Student_EB)) {
return (false);
if (obj == null) {
return (false);
Student_EB student = (Student_EB) obj;
return (student.studentId == studentId);
The Course class:
package CBSD_CW;
import javax.persistence.CascadeType;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToOne;
@Entity
public class Course_EB implements java.io.Serializable {
Course_PK course;
// M:1 relationship with Student_EB.
private Student_EB student;
@ManyToOne(cascade=CascadeType.ALL)
@JoinTable(name = "Student_EB", joinColumns= @JoinColumn(name = "STUDENT_ID", referencedColumnName = "studentId"))
public Student_EB getStudent() {
return (student);
public void setStudent(Student_EB student) {
this.student = student;
// Constructor.
public Course_EB() {
// Accessors and mutators.
@EmbeddedId
public Course_PK getCourse_PK () {
return (course);
public void setCourse_PK(Course_PK course) {
this.course = course;
The Course_PK class:
package CBSD_CW;
import javax.persistence.Column;
import javax.persistence.Embeddable;
@Embeddable
public class Course_PK implements java.io.Serializable {
// Table columns.
@Column(name = "STUDENT_ID", length = 4, nullable = false)
private long studentId; // Student ID. Entity <Student><ID> from file: SampleData.xml.
@Column(name = "COURSE_ID", length = 4, nullable = false)
private String courseId; // Course ID. Entity <Student><Course><Number> from file: SampleData.xml.
@Column(name = "SEMESTER_CODE", length = 3, nullable = false)
private String semesterCode; // Semester Code. Entity <Student><Course><SemesterCode> from file: SampleData.xml.
@Column(name = "GRADE", nullable = true)
private char grade; // Grade. Entity <Student><Course><Grade> from file: SampleData.xml.
// Constructors.
public Course_PK() {
public Course_PK(long studentId, long courseid, String semesterCode) {
this.studentId = studentId;
this.courseId = courseId;
this.semesterCode = semesterCode;
// Accessors and mutators.
public long getStudentId() {
return (studentId);
public void setStudentId(long studentId) {
this.studentId = studentId;
public String getCourseId() {
return (courseId);
public void setId(String courseId) {
this.courseId = courseId;
public String getSemesterCode() {
return (semesterCode);
public void setSemesterCode(String semesterCode) {
this.semesterCode = semesterCode;
public char getGrade() {
return (grade);
public void setGrade(char grade) {
this.grade = grade;
// Other methods.
public boolean equals(Object obj) {
if (obj == this) {
return (true);
if (!(obj instanceof Course_PK)) {
return (false);
if (obj == null) {
return (false);
Course_PK course = (Course_PK) obj;
return ((course.studentId == studentId) &&
(course.courseId.equals(courseId)) &&
(course.semesterCode.equals(semesterCode)) &&
(course.grade == grade));
}Because you have field
@Column(name = "STUDENT_ID", length = 4, nullable = false)
private long studentId; // Student ID. Entity <Student><ID> from file: SampleData.xml.In you Course_PK class. As a primary keys.
An again you are joining it in field
@ManyToOne(cascade=CascadeType.ALL)
@JoinTable(name = "Student_EB", joinColumns= @JoinColumn(name = "STUDENT_ID", referencedColumnName = "studentId"))So it is appearing both inPrimary Key and in Foreign Key. -
One to many relation doesn't work
I tried without success to get a simple one to many relationship to work.
The select works fine but
I still have problems with insert.
I have two tables on a existing schema:
1 ANAG (ID_ANAG primary key,...)
2 INDI (ID_INDI primary key, ID_ENTITA,...), where INDI.ID_ENTITA points
to ANAG.ID_ANAG
the two classes are:
1 public class Anagrafica
private int idAnag; //ID_ANAG
private String ragSoc;
private String ragSocFonet;
private String codFisc;
private String sesso;
private Integer codTit;
private Date dtNasc;
private HashSet indis;
2 public class Indirizzo
private int idIndi; //ID_INDI
private long idEntita; //ID_ENTITA
private long tpEntita;
private String indirizzo;
private String localita;
private String prov;
private String cap;
private Anagrafica anagrafica;
the two metadata:
1 anagrafica.jdo:
<?xml version="1.0"?>
<!-- This JDO Metadata file was auto-generated on 08/10/02 17.44.
See http://www.solarmetric.com for Kodo JDO Documentation and examples. -->
<jdo>
<package name="domain">
<class name="Anagrafica"
identity-type="application"
objectid-class="domain.AnagraficaPK">
<extension key="table" value="ANAG" vendor-name="kodo"/>
<extension key="class-column" value="none" vendor-name="kodo"/>
<extension key="lock-column" value="none" vendor-name="kodo"/>
<field name="idAnag" primary-key="true">
<extension key="data-column" value="ID_ANAG"
vendor-name="kodo"/>
</field>
<field name="ragSoc">
<extension key="data-column" value="RAG_SOC"
vendor-name="kodo"/>
</field>
<field name="ragSocFonet">
<extension key="data-column" value="RAG_SOC_FONET"
vendor-name="kodo"/>
</field>
<field name="codFisc">
<extension key="data-column" value="COD_FISC"
vendor-name="kodo"/>
</field>
<field name="sesso">
<extension key="data-column" value="SESSO"
vendor-name="kodo"/>
</field>
<field name="codTit">
<extension key="data-column" value="COD_TIT"
vendor-name="kodo"/>
</field>
<field name="dtNasc">
<extension key="data-column" value="DT_NASC"
vendor-name="kodo"/>
</field>
<field name="indis">
<collection element-type="domain.Indirizzo"/>
<extension vendor-name="kodo" key="table" value="INDI"/>
<extension vendor-name="kodo" key="inverse"
value="anagrafica"/>
<extension vendor-name="kodo" key="idEntita-ref-column"
value="ID_ANAG"/>
</field>
</class>
</package>
</jdo>
2 Indirizzo.jdo
<?xml version="1.0"?>
<!-- This JDO Metadata file was auto-generated on 08/10/02 17.21.
See http://www.solarmetric.com for Kodo JDO Documentation and examples. -->
<jdo>
<package name="domain">
<class name="Indirizzo"
identity-type="application" objectid-class="domain.IndiPK">
<extension key="table" value="INDI" vendor-name="kodo"/>
<extension key="class-column" value="none" vendor-name="kodo"/>
<extension key="lock-column" value="none" vendor-name="kodo"/>
<!--extension vendor-name="kodo" key="idEntita-data-column"
value="ID_ENTITA"/-->
<field name="idIndi" primary-key="true">
<extension key="data-column" value="ID_INDI"
vendor-name="kodo"/>
</field>
<field name="idEntita">
<extension key="data-column" value="ID_ENTITA"
vendor-name="kodo"/>
</field>
<field name="tpEntita">
<extension key="data-column" value="TP_ENTITA"
vendor-name="kodo"/>
</field>
<field name="indirizzo">
<extension key="data-column" value="INDIRIZZO"
vendor-name="kodo"/>
</field>
<field name="localita">
<extension key="data-column" value="LOCALITA"
vendor-name="kodo"/>
</field>
<field name="prov">
<extension key="data-column" value="PROV"
vendor-name="kodo"/>
</field>
<field name="cap">
<extension key="data-column" value="CAP"
vendor-name="kodo"/>
</field>
<field name="anagrafica">
<extension vendor-name="kodo" key="idAnag-data-column"
value="ID_ENTITA"/>
</field>
</class>
</package>
</jdo>
The problem is:
I create a new Anagrafica object and then I try to save it in the
database. These are the SQL
statements that are generated:
INSERT INTO ANAG(DT_NASC, COD_FISC, RAG_SOC_FONET, SESSO, ID_ANAG,
RAG_SOC, COD_TIT)
VALUES (NULL, NULL, 'NATALE', NULL, 971963921, 'Natale', NULL)
INSERT INTO INDI(TP_ENTITA, PROV, LOCALITA, ID_ENTITA, ID_INDI, INDIRIZZO,
CAP)
VALUES (0, NULL, NULL, 0, 971963921, 'via 25 dicembre', NULL)
Why is the value of ID_ANAG (971963921) assigned to ID_INDI and not to
ID_ENTITA?
Regards
MirkoAbe White wrote:
<field name="indis">
<collection element-type="domain.Indirizzo"/>
<extension vendor-name="kodo" key="table" value="INDI"/>
<extension vendor-name="kodo" key="inverse"
value="anagrafica"/>
<extension vendor-name="kodo" key="idEntita-ref-column"
value="ID_ANAG"/>
</field>
Get rid of all extensions except the inverse:
<field name="indis">
<collection element-type="domain.Indirizzo"/>
<extension vendor-name="kodo" key="inverse" value="anagrafica"/>
</field>
As in the examples in our documentation, all 1-many relations should only
list their inverse 1-1 relation.
Also, make sure your object model is consistent; i.e. make sure you'resetting
both sides of the relation:
indi.setAnagrafica (anag);
anag.getIndis ().add (indi);
Let us know if you continue to have problems.Hi Abe,
I got rid of the unnecessary extensions and I set both sides of the
relation as you suggest but I still have the same problem:
INSERT INTO ANAG(ID_ANAG) VALUES (2088176453)
INSERT INTO INDI(ID_INDI, ID_ENTITA) VALUES (2088176453, NULL)
while I expect
INSERT INTO ANAG(ID_ANAG) VALUES (2088176453)
INSERT INTO INDI(ID_INDI, ID_ENTITA) VALUES (<some ID>, 2088176453)
any ideas?
regards -
i have three tables A,B,C. there is one to many relation between A and B. and one to many relation existed between table b and c . how will get data from these three tables
check if this helps:
select * --you can always frame your column set
from tableA a
left join tableB b on a.aid=b.aid
left join tableC c on c.bid=b.bid
This is just a general query. However, we can help you a lot more, if you can post the DDL + sample data and required output.
Thanks,
Jay
<If the post was helpful mark as 'Helpful' and if the post answered your query, mark as 'Answered'> -
Relation: one - many / findAllEntries()
Hello,
we created a relation one:many (manufacturer:vehicles).
Everything works fine except our findAll() method for the vehicles (many - side).
The problem is that we allways get null as result - what we expect is a collection of our car-entities.
Do we have to pay attention to something special?
Thanks for help,
AndréWhat version of Kodo are you using?
-
How to create one to many relation database based on existing Tables?
Let say I have got 10 tables. Out of these 10 tables one table is used to navigate to other tables and at the some time providing some useful information. Therefore other 9 Tables have the identical structure.
The question is, how can I convert these 10 tables into 2 tables, ie each row of first table correspond to the different data of the other table (one to many relation)?Hello,
>>The question is, how can I convert these 10 tables into 2 tables, ie each row of first table correspond to the different data of the other table (one to many relation)?
I do not quite understand what you ask and I doubt if Entity Framework supports this scenario, since you mentions these tables already exist, after importing them to the designed windows, we cannot modify them or it would throw an error shows the database
and model is mismatched.
Regards.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey. -
OR mapping one-to-many with the movie EJB application
Hi,
I have downloaded from Orion the Movie EJB application with
OR mapping one-to-many.
When I ran it, it's fine. But I have spurious messages on
my OC4J LOG:
Oracle9iAS (9.0.2.0.0) Containers for J2EE initialized
java.lang.Exception
at MovieHome_EntityHomeWrapper53.getLazyInstance(MovieHome_EntityHomeWrapper53.java:219)
at Movie_ORCollection29.getObjects(Movie_ORCollection29.java:43)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at java.util.ArrayList.<init>(ArrayList.java:125)
at com.evermind.server.ejb.ORCollection.getReplacement(ORCollection.java:22)
at Director_EntityBeanWrapper1.getMovies(Director_EntityBeanWrapper1.java:1318)
at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at MovieHome_EntityHomeWrapper53.getLazyInstance(MovieHome_EntityHomeWrapper53.java:219)
at Movie_ORCollection29.getObjects(Movie_ORCollection29.java:43)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at java.util.ArrayList.<init>(ArrayList.java:125)
at com.evermind.server.ejb.ORCollection.getReplacement(ORCollection.java:22)
at Director_EntityBeanWrapper1.getMovies(Director_EntityBeanWrapper1.java:1318)
at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at DirectorHome_EntityHomeWrapper28.getLazyInstance(DirectorHome_EntityHomeWrapper28.java:207)
at Movie_EntityBeanWrapper3.loadState(Movie_EntityBeanWrapper3.java:1575)
at Movie_EntityBeanWrapper3.getTitle(Movie_EntityBeanWrapper3.java:1374) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at DirectorHome_EntityHomeWrapper28.getLazyInstance(DirectorHome_EntityHomeWrapper28.java:207)
at Movie_EntityBeanWrapper3.loadState(Movie_EntityBeanWrapper3.java:1575)
at Movie_EntityBeanWrapper3.getTitle(Movie_EntityBeanWrapper3.java:1374) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
Auto-unpacking /u00/app/oracle/product/9i/j2ee/home/applications/MovieDatabase.ear... done.
Auto-unpacking /u00/app/oracle/product/9i/j2ee/home/applications/MovieDatabase/MovieDatabaseWebClient.war... done.
Auto-deploying MovieDatabaseBeans.jar (Class 'moviebeans.Actor' had been updated)... done.
java.lang.Exception
at ActorHome_EntityHomeWrapper9.getLazyInstance(ActorHome_EntityHomeWrapper9.java:207)
at MovieActorJuncture_ORCollection10.getObjects(MovieActorJuncture_ORCollection10.java:49)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at moviebeans.ActorBean.getMovies(Unknown Source)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:983) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at MovieHome_EntityHomeWrapper57.getLazyInstance(MovieHome_EntityHomeWrapper57.java:219)
at MovieActorJuncture_ORCollection10.getObjects(MovieActorJuncture_ORCollection10.java:69)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at moviebeans.ActorBean.getMovies(Unknown Source)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:983) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at MovieActorJunctureHome_EntityHomeWrapper39.getLazyInstance(MovieActorJunctureHome_EntityHomeWrapper39.java:216)
at MovieActorJuncture_ORCollection10.getObjects(MovieActorJuncture_ORCollection10.java:86)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at moviebeans.ActorBean.getMovies(Unknown Source)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:983) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at DirectorHome_EntityHomeWrapper32.getLazyInstance(DirectorHome_EntityHomeWrapper32.java:207)
at Movie_EntityBeanWrapper7.loadState(Movie_EntityBeanWrapper7.java:1575)
at MovieHome_EntityHomeWrapper57.findExistingEntity(MovieHome_EntityHomeWrapper57.java:108)
at MovieHome_EntityHomeWrapper57.activateEntity(MovieHome_EntityHomeWrapper57.java:157)
at MovieHome_EntityHomeWrapper57.findByPrimaryKey(MovieHome_EntityHomeWrapper57.java:359)
at MovieHome_EntityHomeWrapper57.getEJBObject(MovieHome_EntityHomeWrapper57.java:213)
at com.evermind.server.ejb.EntityHandle.getEJBObject(EntityHandle.java:53)
at com.evermind.server.ejb.EJBInputStream.resolveObject(EJBInputStream.java:41)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:405)
at java.io.ObjectInputStream.inputArray(ObjectInputStream.java:1148)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:380)
at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2268)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:525)
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1417)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:392)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:242)
at com.evermind.server.ejb.EJBUtils.cloneObject(EJBUtils.java:346)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:1075)
at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at DirectorHome_EntityHomeWrapper32.getLazyInstance(DirectorHome_EntityHomeWrapper32.java:207)
at Movie_EntityBeanWrapper7.loadState(Movie_EntityBeanWrapper7.java:1575)
at Movie_EntityBeanWrapper7.getTitle(Movie_EntityBeanWrapper7.java:1374) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
Auto-unpacking /u00/app/oracle/product/9i/j2ee/home/applications/MovieDatabase.ear... done.
java.lang.Exception
at ActorHome_EntityHomeWrapper9.getLazyInstance(ActorHome_EntityHomeWrapper9.java:207)
at MovieActorJuncture_ORCollection10.getObjects(MovieActorJuncture_ORCollection10.java:49)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at moviebeans.ActorBean.getMovies(Unknown Source)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:983) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at MovieHome_EntityHomeWrapper57.getLazyInstance(MovieHome_EntityHomeWrapper57.java:219)
at MovieActorJuncture_ORCollection10.getObjects(MovieActorJuncture_ORCollection10.java:69)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at moviebeans.ActorBean.getMovies(Unknown Source)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:983) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at MovieActorJunctureHome_EntityHomeWrapper39.getLazyInstance(MovieActorJunctureHome_EntityHomeWrapper39.java:216)
at MovieActorJuncture_ORCollection10.getObjects(MovieActorJuncture_ORCollection10.java:86)
at com.evermind.server.ejb.ORCollection.size(ORCollection.java:42)
at moviebeans.ActorBean.getMovies(Unknown Source)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:983) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at DirectorHome_EntityHomeWrapper32.getLazyInstance(DirectorHome_EntityHomeWrapper32.java:207)
at Movie_EntityBeanWrapper7.loadState(Movie_EntityBeanWrapper7.java:1575)
at MovieHome_EntityHomeWrapper57.findExistingEntity(MovieHome_EntityHomeWrapper57.java:108)
at MovieHome_EntityHomeWrapper57.activateEntity(MovieHome_EntityHomeWrapper57.java:157)
at MovieHome_EntityHomeWrapper57.findByPrimaryKey(MovieHome_EntityHomeWrapper57.java:359)
at MovieHome_EntityHomeWrapper57.getEJBObject(MovieHome_EntityHomeWrapper57.java:213)
at com.evermind.server.ejb.EntityHandle.getEJBObject(EntityHandle.java:53)
at com.evermind.server.ejb.EJBInputStream.resolveObject(EJBInputStream.java:41)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:405)
at java.io.ObjectInputStream.inputArray(ObjectInputStream.java:1148)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:380)
at java.io.ObjectInputStream.inputClassFields(ObjectInputStream.java:2268)
at java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.java:525)
at java.io.ObjectInputStream.inputObject(ObjectInputStream.java:1417)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:392)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:242)
at com.evermind.server.ejb.EJBUtils.cloneObject(EJBUtils.java:346)
at Actor_EntityBeanWrapper4.getMovies(Actor_EntityBeanWrapper4.java:1075)
at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
java.lang.Exception
at DirectorHome_EntityHomeWrapper32.getLazyInstance(DirectorHome_EntityHomeWrapper32.java:207)
at Movie_EntityBeanWrapper7.loadState(Movie_EntityBeanWrapper7.java:1575)
at Movie_EntityBeanWrapper7.getTitle(Movie_EntityBeanWrapper7.java:1374) at webclient.MovieDatabaseServlet.processQueryRequest(Unknown Source)
at webclient.MovieDatabaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:195)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:309)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:667)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:702)
at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:250)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)For EntityOne and EntityTwo you can just define a normal OneToMany mapping using the foreign key.
Are you using JPA, or the TopLink API? JPA requires a mappedBy for the OneToMany, so this may be more difficult. You should be able to just add a JoinColumn on the OneToMany and make the column insertable/updateable=false.
For the attachment, you could either map the foreign key as a Basic (DirectToFieldMapping) and maintain it in your model, or use a VariableOneToOne mapping in TopLink (this will require the entities share a common interface).
James : http://www.eclipselink.org : http://en.wikibooks.org/wiki/Java_Persistence -
One-to many relationship in EJB
hi forum
wish you a very happy and prosperous new year
i want to implement CMR in my project but to start with i tried sample application setting one-to many CMR between EMP and DEPT table of scott/tiger .the problem is i have to modify my orion-ejb-jar.xml how can we do it?Are you using JDeveloper? JDeveloper automatically creates the orion-ejb-jar.xml file when you use the EJB wizard.
-
JPA: Issue with loading One To Many relation
Hi All,
I have a One to Many relation mapped as below
@Entity
@Table(name="ACCOUNT_TABLE")
public class UserAccount {
// Attributes
@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="USER_SEQ")
@SequenceGenerator(name="USER_SEQ", sequenceName="USERS_SEQ",allocationSize=1)
@Column(name="CLIENT_ID")
private Long clientId;
@Column(name="USER_ID")
private String userId;
@OneToMany(fetch=FetchType.LAZY, mappedBy="userAccount")
@JoinColumn(name="USER_ID", referencedColumnName="USER_ID", insertable=false, updatable=false)
private List<UserRole> assignedRoles;
@Entity
@Table(name = "ROLE_TABLE")
public class UserRole extends BaseEntity implements Serializable {
private static final long serialVersionUID = -1651953276532642312L;
@Id
@Column(name = "USER_ID", length = 30, nullable=false, insertable=false, updatable=false)
private String userId;
@Column(name = "BUSINESS_CODE", length = 10, nullable=false, insertable=false, updatable=false)
private String businessCode;
@Column(name = "ROLE_NAME", length = 30, nullable=false, insertable=false, updatable=false)
private String roleName;
@ManyToOne()
@JoinColumn(name="USER_ID", referencedColumnName="USER_ID", insertable=false, updatable=false)
private UserAccount userAccount;
As you may have noticed, the tables are not joined on the Primary key of parent. This is legacy schema and I have to work with it.
Account and Role are joined by the USER_ID column. This I specified by providing JoinColumn.
Then I have a DAO to retrieve the relation based on user id.
public class UserAccountDAOJPAImpl UserAccountDAO{
private static final String USER_ACCOUNT_BY_USERID = "select distinct ua " +
"from UserAccount ua " +
"left outer join fetch ua.assignedRoles ar " +
"where ua.userId = ?1 ";
public UserAccount findByUserName(String userName){
UserAccount userAccount=null;
List<UserAccount> userAccounts =null;
Query query = this.entityManager.createQuery(USER_ACCOUNT_BY_USERID);
query.setParameter(1, userName.toUpperCase());
userAccounts = query.getResultList();
if(!userAccounts.isEmpty()) {
userAccount=userAccounts.get(0);
return userAccount;
When I test this code ( for the user Id I used in test there are 11 roles )
The SQL generated is correct, when I run the SQL in PL/SQL Developer, it returns the results as expected.
But the DAO method above returns one UserAccount object with List of 11 UserRole objects as expected. But all of these 11 UserRole objects are same, where as the query returns 11 different roles.
I couldn't figure out what I was doing wrong.
Any help is appreciated.
thanks,
Raghavan@OneToMany(fetch=FetchType.LAZY, mappedBy="userAccount")
@JoinColumn(name="USER_ID", referencedColumnName="USER_ID", insertable=false, updatable=false)
private List<UserRole> assignedRoles;
}What do you get when you remove this @JoinColumn annotation? It shouldn't be necessary. (user_id seems a little suspect as the join column name by the way, I would have expected role_id here...) -
What is the best practice to identify the primary entity in a one-to-many relation?
Lets asume the following:
I have persons. (Table: PERSON, Primary Key: PERSON_ID)
I have contact points (Table: CONTACT_POINTS, Foreign Key to PERSON_ID)
In the E-Business Suite we have a field PRIMARY_FLAG on the CONTACT_POINTS table. This is either Y or N. Now it is upon the application, to verify that only one primary contact point is set. But there is no check in the database. You can have 2 lines, with primary_flag = 'Y'.
This would make it heavy to do a simple select as:
SELECT p.first_name, p.last_name, cp.phone_number FROM PERSON p, CONTACT_POINTS cp WHERE cp.PERSON_ID(+) = p.PERSON_ID AND cp.PRIMARY_FLAG(+) = 'Y'
Because if you have, by mistake, 2 lines with PRIMARY_FLAG = 'Y', you would get 2 result lines in the query above, which is not wanted.
A second way would be to have the PRIMARY_FLAG field is filled either with Y or NULL. In addition I can set a unique constrain over PERSON_ID and PRIMARY_FLAG and the database will block every try to add a second Y for one person. In that way I can be sure that I either have a primary contact point or I do not have one. So the query will result the same number of lines as there are in the PERSON table. BUT: whenever I go that way, I have to verify my application logic, that every change on the primary flag must set the old primary entry off and then insert or update the new primary entry.
Which one is the best way, in practice? Are there other solutions? What are advantages ?
Best Regards
AlexanderYou can create unique function based index on your CONTACT_POINTS table as follows:
(person_id, case when primary_flag = 'Y' then primary_flag else null end)
So as soon as you'll insert another row with Y, you'll get error, but with other values like N, all will be OK.
And yes - I think it is worth to check data integrity in DB :)
Gints Plivna
http://www.gplivna.eu -
TopLink11 Tutorial problems with one-to-many relation
Hi,
I installed TopLink 11 and the related tutorial to work in a simple Eclipse project.
Everthing works fine except for the storing of the one-to-many relation in the database.
The tutorial works with employee, address and phone tables/classes. Plain Objects can be stored and one-to-one relations too. However when trying to store a one-to-many relation not the key of the related object (which is at that tome well known) but the object is tried to be entered
in the Logfile I find:
[TopLink Fine]: 2008.01.10 10:27:28.748--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--INSERT INTO EMPLOYEE (EMP_ID, L_NAME, F_NAME, ADDR_ID, VERSION) VALUES (?, ?, ?, ?, ?)
bind => [1501, Pascal, Blaise, 2252, 1]
[TopLink Finer]: 2008.01.10 10:27:28.748--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--commit transaction
[TopLink Finer]: 2008.01.10 10:27:28.748--UnitOfWork(14858725)--Thread(Thread[main,5,main])--end unit of work commit
[TopLink Finer]: 2008.01.10 10:27:28.748--UnitOfWork(14858725)--Thread(Thread[main,5,main])--release unit of work
[TopLink Finer]: 2008.01.10 10:27:28.748--UnitOfWork(14858725)--Thread(Thread[main,5,main])--release unit of work
[TopLink Finest]: 2008.01.10 10:27:28.748--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Register the object Employee: Blaise Pascal
[TopLink Finest]: 2008.01.10 10:27:28.748--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Execute query DoesExistQuery()
[TopLink Finer]: 2008.01.10 10:28:58.370--UnitOfWork(18511661)--Thread(Thread[main,5,main])--begin unit of work commit
[TopLink Finer]: 2008.01.10 10:28:58.370--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--begin transaction
[TopLink Finest]: 2008.01.10 10:28:58.370--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Execute query UpdateObjectQuery(Employee: Blaise Pascal)
[TopLink Finest]: 2008.01.10 10:28:58.386--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Execute query InsertObjectQuery(PhoneNumber[desk]: (603) 123-4567)
[TopLink Fine]: 2008.01.10 10:28:58.386--DatabaseSessionImpl(12916846)--Connection(9550256)--Thread(Thread[main,5,main])--INSERT INTO PHONE (P_NUMBER, EMP_ID, AREA_CODE, TYPE) VALUES (?, ?, ?, ?)
bind => [1234567, {Employee: Blaise Pascal}, 603, desk]
[TopLink Warning]: 2008.01.10 10:28:58.511--UnitOfWork(18511661)--Thread(Thread[main,5,main])--Local Exception Stack:
Exception [TOPLINK-4002] (Oracle TopLink - 11g Technology Preview 3 (11.1.1.0.0) (Build 071214)): oracle.toplink.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Ungültiger Spaltentyp Error Code: 17004
the highlighted section should be 1501 (the key of the employee record)
Any ideas how to fix this?
Thanks ErikaErika,
You need to specify the other side of the relationship (on the PhoneNumber side), which is done by putting a @ManyToOne annotation on the "employee" attribute in PhoneNumber. That will cause TopLink to know that it is a relationship and not a basic mapping.
-Mike -
Unable to read one-to-many relations using Hibernate
Hi,
I am trying with a very simple one-to-many relationship. When I am storing the objects, there are no problems. But when I am trying to read out the collection, it says invalid descriptor index. Please help.
Regards,
Hibernate version:
hibernate-3.1rc2
Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="Parent">
<id name="id">
<generator class="identity"/>
</id>
<set name="children">
<key column="parent_id"/>
<one-to-many class="Child"/>
</set>
</class>
<class name="Child">
<id name="id">
<generator class="identity"/>
</id>
<property name="name"/>
</class>
</hibernate-mapping>
Code between sessionFactory.openSession() and session.close():
The Parent class:
public class Parent
private Long id ;
private Set children;
Parent(){}
public Long getId()
return id;
public void setId(Long id)
this.id=id;
public Set getChildren()
return children;
public void setChildren(Set children)
this.children=children;
The Child class:
public class Child
private Long id;
private String name;
Child(){}
public Long getId()
return id;
private void setId(Long id)
this.id=id;
public String getName()
return name;
public void setName(String name)
this.name=name;
The Main class:
public class PCManager
public static void main(String[] args)
PCManager mgr = new PCManager();
List lt = null;
if (args[0].equals("store"))
mgr.createAndStoreParent(new HashSet(3));
else if (args[0].equals("list"))
mgr.listEvents();
HibernateUtil.getSessionFactory().close();
private void createAndStoreParent(HashSet s)
HibernateUtil.getSessionFactory().getCurrentSession().beginTransaction();
Parent p1 = new Parent();
int size = 3;
for (int i=size; i>0; i--)
Child c = new Child();
c.setName("Child"+i);
s.add(c);
p1.setChildren (s);
Iterator elems = s.iterator();
do {
Child ch = (Child) elems.next();
HibernateUtil.getSessionFactory().getCurrentSession().save(ch);
}while(elems.hasNext());
HibernateUtil.getSessionFactory().getCurrentSession().save(p1);
HibernateUtil.getSessionFactory().getCurrentSession().getTransaction().commit();
private void listEvents()
HibernateUtil.getSessionFactory().getCurrentSession().beginTransaction();
Parent result = (Parent) HibernateUtil.getSessionFactory().getCurrentSession().load(Parent.class, new Long(1));
System.out.println("Id is :"+ result.getId());
Set children = result.getChildren();
Iterator elems = children.iterator();
do {
Child ch = (Child) elems.next();
System.out.println("Child Name"+ ch.getName());
}while(elems.hasNext());
HibernateUtil.getSessionFactory().getCurrentSession().getTransaction().commit();
Full stack trace of any exception that occurs:
When I run with "hbm2ddl.auto" property as validate and trying to list the contents, I get the following out put.
C:\Documents and Settings\mirza\Desktop\hibernate-3.1rc2\MyHibernate>ant run -Da
ction=list
Buildfile: build.xml
clean:
[delete] Deleting directory C:\Documents and Settings\mirza\Desktop\hibernate
-3.1rc2\MyHibernate\bin
[mkdir] Created dir: C:\Documents and Settings\mirza\Desktop\hibernate-3.1rc
2\MyHibernate\bin
copy-resources:
[copy] Copying 4 files to C:\Documents and Settings\mirza\Desktop\hibernate
-3.1rc2\MyHibernate\bin
compile:
[javac] Compiling 5 source files to C:\Documents and Settings\mirza\Desktop\
hibernate-3.1rc2\MyHibernate\bin
run:
[java] 09:09:23,433 INFO Environment:474 - Hibernate 3.1 rc2
[java] 09:09:23,449 INFO Environment:489 - loaded properties from resource
hibernate.properties: {hibernate.cglib.use_reflection_optimizer=true, hibernate
.cache.provider_class=org.hibernate.cache.HashtableCacheProvider, hibernate.dial
ect=org.hibernate.dialect.SQLServerDialect, hibernate.max_fetch_depth=1, hiberna
te.jdbc.use_streams_for_binary=true, hibernate.format_sql=true, hibernate.query.
substitutions=yes 'Y', no 'N', hibernate.proxool.pool_alias=pool1, hibernate.cac
he.region_prefix=hibernate.test, hibernate.jdbc.batch_versioned_data=true, hiber
nate.connection.pool_size=1}
[java] 09:09:23,465 INFO Environment:519 - using java.io streams to persis
t binary types
[java] 09:09:23,465 INFO Environment:520 - using CGLIB reflection optimize
r
[java] 09:09:23,481 INFO Environment:550 - using JDK 1.4 java.sql.Timestam
p handling
[java] 09:09:23,559 INFO Configuration:1257 - configuring from resource: /
hibernate.cfg.xml
[java] 09:09:23,559 INFO Configuration:1234 - Configuration resource: /hib
ernate.cfg.xml
[java] 09:09:23,872 INFO Configuration:460 - Reading mappings from resourc
e: PCMapping.hbm.xml
[java] 09:09:24,013 INFO HbmBinder:266 - Mapping class: Parent -> Parent
[java] 09:09:24,045 INFO HbmBinder:266 - Mapping class: Child -> Child
[java] 09:09:24,045 INFO Configuration:1368 - Configured SessionFactory: n
ull
[java] 09:09:24,061 INFO Configuration:1014 - processing extends queue
[java] 09:09:24,061 INFO Configuration:1018 - processing collection mappin
gs
[java] 09:09:24,061 INFO HbmBinder:2233 - Mapping collection: Parent.child
ren -> Child
[java] 09:09:24,076 INFO Configuration:1027 - processing association prope
rty references
[java] 09:09:24,076 INFO Configuration:1049 - processing foreign key const
raints
[java] 09:09:24,155 INFO DriverManagerConnectionProvider:41 - Using Hibern
ate built-in connection pool (not for production use!)
[java] 09:09:24,170 INFO DriverManagerConnectionProvider:42 - Hibernate co
nnection pool size: 1
[java] 09:09:24,170 INFO DriverManagerConnectionProvider:45 - autocommit m
ode: false
[java] 09:09:24,170 INFO DriverManagerConnectionProvider:80 - using driver
: sun.jdbc.odbc.JdbcOdbcDriver at URL: jdbc:odbc:MySQL
[java] 09:09:24,170 INFO DriverManagerConnectionProvider:86 - connection p
roperties: {}
[java] 09:09:24,264 INFO SettingsFactory:77 - RDBMS: Microsoft SQL Server,
version: 08.00.0194
[java] 09:09:24,264 INFO SettingsFactory:78 - JDBC driver: JDBC-ODBC Bridg
e (SQLSRV32.DLL), version: 2.0001 (03.85.1117)
[java] 09:09:24,296 INFO Dialect:100 - Using dialect: org.hibernate.dialec
t.SQLServerDialect
[java] 09:09:24,311 INFO TransactionFactoryFactory:31 - Using default tran
saction strategy (direct JDBC transactions)
[java] 09:09:24,327 INFO TransactionManagerLookupFactory:33 - No Transacti
onManagerLookup configured (in JTA environment, use of read-write or transaction
al second-level cache is not recommended)
[java] 09:09:24,327 INFO SettingsFactory:125 - Automatic flush during befo
reCompletion(): disabled
[java] 09:09:24,327 INFO SettingsFactory:129 - Automatic session close at
end of transaction: disabled
[java] 09:09:24,343 INFO SettingsFactory:144 - Scrollable result sets: ena
bled
[java] 09:09:24,343 INFO SettingsFactory:152 - JDBC3 getGeneratedKeys(): d
isabled
[java] 09:09:24,343 INFO SettingsFactory:160 - Connection release mode: au
to
[java] 09:09:24,358 INFO SettingsFactory:184 - Maximum outer join fetch de
pth: 1
[java] 09:09:24,358 INFO SettingsFactory:187 - Default batch fetch size: 1
[java] 09:09:24,358 INFO SettingsFactory:191 - Generate SQL with comments:
disabled
[java] 09:09:24,358 INFO SettingsFactory:195 - Order SQL updates by primar
y key: disabled
[java] 09:09:24,358 INFO SettingsFactory:338 - Query translator: org.hiber
nate.hql.ast.ASTQueryTranslatorFactory
[java] 09:09:24,374 INFO ASTQueryTranslatorFactory:21 - Using ASTQueryTran
slatorFactory
[java] 09:09:24,374 INFO SettingsFactory:203 - Query language substitution
s: {no='N', yes='Y'}
[java] 09:09:24,374 INFO SettingsFactory:209 - Second-level cache: enabled
[java] 09:09:24,374 INFO SettingsFactory:213 - Query cache: disabled
[java] 09:09:24,374 INFO SettingsFactory:325 - Cache provider: org.hiberna
te.cache.HashtableCacheProvider
[java] 09:09:24,374 INFO SettingsFactory:228 - Optimize cache for minimal
puts: disabled
[java] 09:09:24,374 INFO SettingsFactory:233 - Cache region prefix: hibern
ate.test
[java] 09:09:24,405 INFO SettingsFactory:237 - Structured second-level cac
he entries: disabled
[java] 09:09:24,437 INFO SettingsFactory:257 - Echoing all SQL to stdout
[java] 09:09:24,452 INFO SettingsFactory:264 - Statistics: disabled
[java] 09:09:24,452 INFO SettingsFactory:268 - Deleted entity synthetic id
entifier rollback: disabled
[java] 09:09:24,452 INFO SettingsFactory:283 - Default entity-mode: POJO
[java] 09:09:24,593 INFO SessionFactoryImpl:155 - building session factory
[java] 09:09:24,938 INFO SessionFactoryObjectFactory:82 - Not binding fact
ory to JNDI, no JNDI name configured
[java] 09:09:24,954 INFO SchemaValidator:99 - Running schema validator
[java] 09:09:24,954 INFO SchemaValidator:107 - fetching database metadata
[java] 09:09:24,954 INFO Configuration:1014 - processing extends queue
[java] 09:09:24,954 INFO Configuration:1018 - processing collection mappin
gs
[java] 09:09:24,954 INFO Configuration:1027 - processing association prope
rty references
[java] 09:09:24,954 INFO Configuration:1049 - processing foreign key const
raints
[java] 09:09:24,985 WARN JDBCExceptionReporter:71 - SQL Error: 0, SQLState
: S1002
[java] 09:09:24,985 ERROR JDBCExceptionReporter:72 - [Microsoft][ODBC SQL S
erver Driver]Invalid Descriptor Index
[java] 09:09:25,001 ERROR SchemaValidator:129 - Error closing connection
[java] java.sql.SQLException: [Microsoft][ODBC SQL Server Driver]Invalid transaction state
[java] Initial SessionFactory creation failed.org.hibernate.exception.Gener
icJDBCException: could not get table metadata: Child
[java] java.lang.ExceptionInInitializerError
[java] at HibernateUtil.<clinit>(Unknown Source)
[java] at PCManager.listEvents(Unknown Source)
[java] at PCManager.main(Unknown Source)
[java] Caused by: org.hibernate.exception.GenericJDBCException: could not g
et table metadata: Child
[java] at org.hibernate.exception.SQLStateConverter.handledNonSpecificE
xception(SQLStateConverter.java:91)
[java] at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6879)
[java] at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7036)
[java] at sun.jdbc.odbc.JdbcOdbc.SQLDisconnect(JdbcOdbc.java:2988)
[java] at sun.jdbc.odbc.JdbcOdbcDriver.disconnect(JdbcOdbcDriver.java:9
80)
[java] at sun.jdbc.odbc.JdbcOdbcConnection.close(JdbcOdbcConnection.jav
a:739)
[java] at org.hibernate.tool.hbm2ddl.SchemaValidator.validate(SchemaVal
idator.java:125)
[java] at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryIm
pl.java:299)
[java] at org.hibernate.cfg.Configuration.buildSessionFactory(Configura
tion.java:1145)
[java] at HibernateUtil.<clinit>(Unknown Source)
[java] at org.hibernate.exception.SQLStateConverter.convert(SQLStateCon
verter.java:79)
[java] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExcep
tionHelper.java:43)
[java] at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExcep
tionHelper.java:29)
[java] at org.hibernate.tool.hbm2ddl.DatabaseMetadata.getTableMetadata(
DatabaseMetadata.java:100)
[java] at org.hibernate.cfg.Configuration.validateSchema(Configuration.
java:946)
[java] at org.hibernate.tool.hbm2ddl.SchemaValidator.validate(SchemaVal
idator.java:116)
[java] at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryIm
pl.java:299)
[java] at org.hibernate.cfg.Configuration.buildSessionFactory(Configura
tion.java:1145)
[java] ... 3 more
[java] Caused by: java.sql.SQLException: [Microsoft][ODBC SQL Server Driver
]Invalid Descriptor Index
[java] at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6879)
[java] at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7036)
[java] at sun.jdbc.odbc.JdbcOdbc.SQLGetDataString(JdbcOdbc.java:3862)
[java] at sun.jdbc.odbc.JdbcOdbcResultSet.getDataString(JdbcOdbcResultS
et.java:5561)
[java] at sun.jdbc.odbc.JdbcOdbcResultSet.getString(JdbcOdbcResultSet.j
ava:338)
[java] at sun.jdbc.odbc.JdbcOdbcResultSet.getString(JdbcOdbcResultSet.j
ava:395)
[java] at PCManager.listEvents(Unknown Source)
[java] at PCManager.main(Unknown Source)
[java] at org.hibernate.tool.hbm2ddl.TableMetadata.<init>(TableMetadata
.java:30)
[java] at org.hibernate.tool.hbm2ddl.DatabaseMetadata.getTableMetadata(
DatabaseMetadata.java:85)
[java] ... 7 more
[java] Exception in thread "main"
[java] Java Result: 1
BUILD SUCCESSFUL
Total time: 4 seconds
Name and version of the database you are using:
Microsoft SQLServer2000
The generated SQL (show_sql=true):
When the program is run with "hbm2ddl.auto" property as create, I get the following output.
C:\Documents and Settings\mirza\Desktop\hibernate-3.1rc2\MyHibernate>ant run -Daction=store
Buildfile: build.xml
clean:
[delete] Deleting directory C:\Documents and Settings\mirza\Desktop\hibernate
-3.1rc2\MyHibernate\bin
[mkdir] Created dir: C:\Documents and Settings\mirza\Desktop\hibernate-3.1rc
2\MyHibernate\bin
copy-resources:
[copy] Copying 4 files to C:\Documents and Settings\mirza\Desktop\hibernate
-3.1rc2\MyHibernate\bin
compile:
[javac] Compiling 5 source files to C:\Documents and Settings\mirza\Desktop\
hibernate-3.1rc2\MyHibernate\bin
run:
[java] 09:12:54,820 INFO Environment:474 - Hibernate 3.1 rc2
[java] 09:12:54,836 INFO Environment:489 - loaded properties from resource
hibernate.properties: {hibernate.cglib.use_reflection_optimizer=true, hibernate
.cache.provider_class=org.hibernate.cache.HashtableCacheProvider, hibernate.dial
ect=org.hibernate.dialect.SQLServerDialect, hibernate.max_fetch_depth=1, hiberna
te.jdbc.use_streams_for_binary=true, hibernate.format_sql=true, hibernate.query.
substitutions=yes 'Y', no 'N', hibernate.proxool.pool_alias=pool1, hibernate.cac
he.region_prefix=hibernate.test, hibernate.jdbc.batch_versioned_data=true, hiber
nate.connection.pool_size=1}
[java] 09:12:54,852 INFO Environment:519 - using java.io streams to persis
t binary types
[java] 09:12:54,852 INFO Environment:520 - using CGLIB reflection optimize
r
[java] 09:12:54,867 INFO Environment:550 - using JDK 1.4 java.sql.Timestam
p handling
[java] 09:12:54,946 INFO Configuration:1257 - configuring from resource: /
hibernate.cfg.xml
[java] 09:12:54,946 INFO Configuration:1234 - Configuration resource: /hib
ernate.cfg.xml
[java] 09:12:55,259 INFO Configuration:460 - Reading mappings from resourc
e: PCMapping.hbm.xml
[java] 09:12:55,400 INFO HbmBinder:266 - Mapping class: Parent -> Parent
[java] 09:12:55,447 INFO HbmBinder:266 - Mapping class: Child -> Child
[java] 09:12:55,447 INFO Configuration:1368 - Configured SessionFactory: n
ull
[java] 09:12:55,447 INFO Configuration:1014 - processing extends queue
[java] 09:12:55,447 INFO Configuration:1018 - processing collection mappin
gs
[java] 09:12:55,447 INFO HbmBinder:2233 - Mapping collection: Parent.child
ren -> Child
[java] 09:12:55,463 INFO Configuration:1027 - processing association prope
rty references
[java] 09:12:55,479 INFO Configuration:1049 - processing foreign key const
raints
[java] 09:12:55,557 INFO DriverManagerConnectionProvider:41 - Using Hibern
ate built-in connection pool (not for production use!)
[java] 09:12:55,557 INFO DriverManagerConnectionProvider:42 - Hibernate co
nnection pool size: 1
[java] 09:12:55,557 INFO DriverManagerConnectionProvider:45 - autocommit m
ode: false
[java] 09:12:55,573 INFO DriverManagerConnectionProvider:80 - using driver
: sun.jdbc.odbc.JdbcOdbcDriver at URL: jdbc:odbc:MySQL
[java] 09:12:55,573 INFO DriverManagerConnectionProvider:86 - connection p
roperties: {}
[java] 09:12:55,651 INFO SettingsFactory:77 - RDBMS: Microsoft SQL Server,
version: 08.00.0194
[java] 09:12:55,667 INFO SettingsFactory:78 - JDBC driver: JDBC-ODBC Bridg
e (SQLSRV32.DLL), version: 2.0001 (03.85.1117)
[java] 09:12:55,682 INFO Dialect:100 - Using dialect: org.hibernate.dialec
t.SQLServerDialect
[java] 09:12:55,698 INFO TransactionFactoryFactory:31 - Using default tran
saction strategy (direct JDBC transactions)
[java] 09:12:55,714 INFO TransactionManagerLookupFactory:33 - No Transacti
onManagerLookup configured (in JTA environment, use of read-write or transaction
al second-level cache is not recommended)
[java] 09:12:55,714 INFO SettingsFactory:125 - Automatic flush during befo
reCompletion(): disabled
[java] 09:12:55,714 INFO SettingsFactory:129 - Automatic session close at
end of transaction: disabled
[java] 09:12:55,729 INFO SettingsFactory:144 - Scrollable result sets: ena
bled
[java] 09:12:55,729 INFO SettingsFactory:152 - JDBC3 getGeneratedKeys(): d
isabled
[java] 09:12:55,745 INFO SettingsFactory:160 - Connection release mode: au
to
[java] 09:12:55,745 INFO SettingsFactory:184 - Maximum outer join fetch de
pth: 1
[java] 09:12:55,745 INFO SettingsFactory:187 - Default batch fetch size: 1
[java] 09:12:55,745 INFO SettingsFactory:191 - Generate SQL with comments:
disabled
[java] 09:12:55,745 INFO SettingsFactory:195 - Order SQL updates by primar
y key: disabled
[java] 09:12:55,745 INFO SettingsFactory:338 - Query translator: org.hiber
nate.hql.ast.ASTQueryTranslatorFactory
[java] 09:12:55,777 INFO ASTQueryTranslatorFactory:21 - Using ASTQueryTran
slatorFactory
[java] 09:12:55,792 INFO SettingsFactory:203 - Query language substitution
s: {no='N', yes='Y'}
[java] 09:12:55,792 INFO SettingsFactory:209 - Second-level cache: enabled
[java] 09:12:55,792 INFO SettingsFactory:213 - Query cache: disabled
[java] 09:12:55,792 INFO SettingsFactory:325 - Cache provider: org.hiberna
te.cache.HashtableCacheProvider
[java] 09:12:55,808 INFO SettingsFactory:228 - Optimize cache for minimal
puts: disabled
[java] 09:12:55,808 INFO SettingsFactory:233 - Cache region prefix: hibern
ate.test
[java] 09:12:55,808 INFO SettingsFactory:237 - Structured second-level cac
he entries: disabled
[java] 09:12:55,839 INFO SettingsFactory:257 - Echoing all SQL to stdout
[java] 09:12:55,839 INFO SettingsFactory:264 - Statistics: disabled
[java] 09:12:55,839 INFO SettingsFactory:268 - Deleted entity synthetic id
entifier rollback: disabled
[java] 09:12:55,839 INFO SettingsFactory:283 - Default entity-mode: POJO
[java] 09:12:55,980 INFO SessionFactoryImpl:155 - building session factory
[java] 09:12:56,325 INFO SessionFactoryObjectFactory:82 - Not binding fact
ory to JNDI, no JNDI name configured
[java] 09:12:56,341 INFO Configuration:1014 - processing extends queue
[java] 09:12:56,341 INFO Configuration:1018 - processing collection mappin
gs
[java] 09:12:56,341 INFO Configuration:1027 - processing association prope
rty references
[java] 09:12:56,341 INFO Configuration:1049 - processing foreign key const
raints
[java] 09:12:56,356 INFO Configuration:1014 - processing extends queue
[java] 09:12:56,356 INFO Configuration:1018 - processing collection mappin
gs
[java] 09:12:56,356 INFO Configuration:1027 - processing association prope
rty references
[java] 09:12:56,372 INFO Configuration:1049 - processing foreign key const
raints
[java] 09:12:56,372 INFO SchemaExport:153 - Running hbm2ddl schema export
[java] 09:12:56,388 DEBUG SchemaExport:171 - import file not found: /import
.sql
[java] 09:12:56,388 INFO SchemaExport:180 - exporting generated schema to
database
[java] 09:12:56,403 DEBUG SchemaExport:283 -
[java] alter table Child
[java] drop constraint FK3E104FC976A59A
[java] 09:12:56,466 DEBUG SchemaExport:283 -
[java] drop table Child
[java] 09:12:56,544 DEBUG SchemaExport:283 -
[java] drop table Parent
[java] 09:12:56,654 DEBUG SchemaExport:283 -
[java] create table Child (
[java] id numeric(19,0) identity not null,
[java] name varchar(255) null,
[java] parent_id numeric(19,0) null,
[java] primary key (id)
[java] )
[java] 09:12:56,779 DEBUG SchemaExport:283 -
[java] create table Parent (
[java] id numeric(19,0) identity not null,
[java] primary key (id)
[java] )
[java] 09:12:56,873 DEBUG SchemaExport:283 -
[java] alter table Child
[java] add constraint FK3E104FC976A59A
[java] foreign key (parent_id)
[java] references Parent
[java] 09:12:56,952 INFO SchemaExport:200 - schema export complete
[java] 09:12:56,952 WARN JDBCExceptionReporter:48 - SQL Warning: 5701, SQL
State: 01000
[java] 09:12:56,952 WARN JDBCExceptionReporter:49 - [Microsoft][ODBC SQL S
erver Driver][SQL Server]Changed database context to 'master'.
[java] 09:12:56,952 WARN JDBCExceptionReporter:48 - SQL Warning: 5703, SQL
State: 01000
[java] 09:12:56,952 WARN JDBCExceptionReporter:49 - [Microsoft][ODBC SQL S
erver Driver][SQL Server]Changed language setting to us_english.
[java] 09:12:56,983 INFO SessionFactoryImpl:432 - Checking 0 named queries
[java] Hibernate:
[java] insert
[java] into
[java] Child
[java] (name)
[java] values
[java] (?) select
[java] scope_identity()
[java] Hibernate:
[java] insert
[java] into
[java] Child
[java] (name)
[java] values
[java] (?) select
[java] scope_identity()
[java] Hibernate:
[java] insert
[java] into
[java] Child
[java] (name)
[java] values
[java] (?) select
[java] scope_identity()
[java] Hibernate:
[java] insert
[java] into
[java] Parent
[java] default
[java] values
[java] select
[java] scope_identity()
[java] Hibernate:
[java] update
[java] Child
[java] set
[java] parent_id=?
[java] where
[java] id=?
[java] Hibernate:
[java] update
[java] Child
[java] set
[java] parent_id=?
[java] where
[java] id=?
[java] Hibernate:
[java] update
[java] Child
[java] set
[java] parent_id=?
[java] where
[java] id=?
[java] 09:12:57,390 INFO SessionFactoryImpl:831 - closing
[java] 09:12:57,390 INFO DriverManagerConnectionProvider:147 - cleaning up
connection pool: jdbc:odbc:MySQL
BUILD SUCCESSFUL
Total time: 5 seconds
Debug level Hibernate log excerpt:
Included in the above description.That's not the right mapping for the 1:m relationship in Hibernate.
First of all, I believe the recommendation is to have a separate .hbm.xml file for each class, so you should have one for Parent and Child.
Second, you'll find the proper syntax for a one-to-many relationship here:
http://www.hibernate.org/hib_docs/v3/reference/en/html/tutorial.html#tutorial-associations
See if those help.
The tutorial docs for Hibernate are quite good. I'd recommend going through them carefully.
% -
One-to-many relation sometimes INSERTs child before parent
Hi,
I have a one-to-many relationship, say Company-Employee, that I want to be
managed by the parent entity (Company), so that when I make persistent the
Company, its Employees are also made persistent, and when I delete the
Company, its Employees are deleted. In my Java code, Company has an
ArrayList of Employees, and Employee has a Company member variable.
My metadata looks like this:
<class name="Company" identity-type="application">...
<field name="employees">
<collection element-type="Employee"/>
<extension vendor-name="kodo" key="inverse-owner" value="company"/>
<!-- delete all Employees when the Company is deleted -->
<extension vendor-name="kodo" key="element-dependent" value="true"/>
</field>
</class>
<class name="Employee" identity-type="application">...
<field name="company"/>
</class>
I have a test that is creating a Company with an Employee and persisting
it. It then deletes the Company. The test is passing some of the time and
failing some of the time. It seems to not be consistent with the ordering
of the INSERTs - sometimes it inserts Company then Employee, but sometimes
it first tries to insert into Employee, which fails with a foreign key
constraint to the parent table.
How can I force it to insert into the parent table first?
I notice that the documentation says you need the field of the child
entity to be the inverse-owner. Is it not possible for the parent entity
to own the relationship?
Many thanks,
AlexAlex,
If you have non-deferred foreign keys between the tables, and you turn
on Kodo's foreign key reordering algorithm, Kodo will ensure that all
your foreign key constraints are met, regardless of the ordering of the
operations in your Java code.
See http://docs.solarmetric.com/ref_guide_dbsetup_fks.html for details
about this.
Regarding inverse-owner specification -- is there any reason why you
want to specify this on the other side? inverse-owner basically defines
which side of a shared relationship defines the mappings and should be
monitored for changes; it does not have any impact on the mappings
themselves.
-Patrick
Alex Robbins wrote:
Hi,
I have a one-to-many relationship, say Company-Employee, that I want to be
managed by the parent entity (Company), so that when I make persistent the
Company, its Employees are also made persistent, and when I delete the
Company, its Employees are deleted. In my Java code, Company has an
ArrayList of Employees, and Employee has a Company member variable.
My metadata looks like this:
<class name="Company" identity-type="application">...
<field name="employees">
<collection element-type="Employee"/>
<extension vendor-name="kodo" key="inverse-owner" value="company"/>
<!-- delete all Employees when the Company is deleted -->
<extension vendor-name="kodo" key="element-dependent" value="true"/>
</field>
</class>
<class name="Employee" identity-type="application">...
<field name="company"/>
</class>
I have a test that is creating a Company with an Employee and persisting
it. It then deletes the Company. The test is passing some of the time and
failing some of the time. It seems to not be consistent with the ordering
of the INSERTs - sometimes it inserts Company then Employee, but sometimes
it first tries to insert into Employee, which fails with a foreign key
constraint to the parent table.
How can I force it to insert into the parent table first?
I notice that the documentation says you need the field of the child
entity to be the inverse-owner. Is it not possible for the parent entity
to own the relationship?
Many thanks,
Alex -
How to insert data in a one-to-many relationship
How do you insert data into the client, my model entity beans have a one-to-many relationship.
PARENT ENTITY BEAN
PARENT-ID
PARENT-NAME
The ejbCreate(Integer parentID,String name)
CHILD ENTITY BEAN
CHILD-ID
CHILD-NAME
PARENT-ID(foreign key of PARENTID).
ejbCreate(Integer parentID,String name,String foreignparentID)
In a jsp page i collect the parent details and 3 corresponding chld details in a text box.
Can you please tell me how do i proceed from here...
ie. how to i insert data into the entity beans..
Do i pass the child as a collection, and within parents ejbCreate() method do i lookup for the childs home interface and insert one -by -one from the collection.
1. Considering the above example, can some one pls tell how the ejbCreate() mehod signatures, for the parent and child entity beans should be.
2. Pls also show some sample client code as to how to make an insertion.
3. In case you are passing a collection of child data, then in what format does one have to insert into a collection and also how does the container know how to insert the values in the child table , bcoz we are passing as a collection.
4.In case collections cannot be inserted do we need to iterate into the collection in parent's ejbCreate() method, and manually insert into the database of the childtable, thereby creating child entity beans.
Thanks for your time and support...
regards
kartikHi,
3. In this case of course child's ejbCreate(and postCreate) looks like
ejbCreate(Integer childID,String name,ParentLocal parent) {
setId(Id);
setName(name);
ejbPostCreate(Integer childID,String name,ParentLocal parent) {
setParent(parent);
Here you don't need IDs, but it happens only using Locals, not Remotes, if I'm not wrong. Container does it itself.
1. Of course, if you have parent.getChildren() and parent.setChildren() then you don't need any loops, but it should be done anyway in postCreate, because in ejbCreate there no parent exists yet.
Once more 3: example - I'm using JBoss 3.2.5 as EJB container. It has tomcat inside and EJB and JSP+Struts use the same jvm. It means for me that I don't need to use remote interfaces, just locals. And in this case I can implement ejb-relations. So, a have the abstract method parent.getChildren() which returns Collection of ChildLocal - s and method parent.setChildren(Collection childrenLocals) which creates/modifies children by itself.
I have not used remotes for a long time, but as I remember it was not possible to implement ejb-relations using remotes.
regards,
Gio
Maybe you are looking for
-
Hi All Please try to solve my problem which is described below. I have one Delivery Number for a specific Customer, For which I am creating Invoice using VF01. But when I complete the VF01 and press save it shows Message as "Document <Number> created
-
Help! updated to Server 4 with Yosemite now pc based computers will no longer connect to our network
Hello, I have become the defacto tech guy at the catholic school I work at. Within the last week per Apple's advice I updated our 2012 Mac Mini server to Yosemite form Lion and Updated the Server from 2.Something to 4. Now, all of the apple products
-
ITunes 9.0.1 has just deleted most of my apps!
Downloaded the new iTunes 9.0.1 (prompted by software updater) and synced it with my iPhone 3G (OS 3.1). Now most of my paid + free apps have disappeared off my phone, even after I have authorized my computer with iTunes Store. *** is Apple doing?
-
Serving MS HTA files from Weblogic
Can anyone tell me if there is a way to have the weblogic server serve hta files. thanks Joe
-
Problem during Rate Routing Upload using BDC.
Dear Sir/Madam, I am uploading Rate Routings using a BDC program which is working perfectly but having a single problem. In the initial screen of the transaction CA21(Create Rate Routing), I need to enter only the Material Number and its Plant and al