Many-to-many mapping
Hello,
I would like to map many-to-many on two objects.
Also I want to keep relationship info in the table:
JDO_TEST_GROUP_RIGHT_LINKS
GROUPID | RIGHHTID
I have class "Right" and class "Group"
they ref. each other over collection.
e.g.
class Right
private String rightID; //key
private List groups;
public List getGroups()
class Group
private String groupID; //key
private List users;
public List getUsers()
here is my JDO metadata:
<class name="Right" identity-type="application"
objectid-class="Right$RightID">
<extension vendor-name="kodo" key="table" value="JDO_TEST_RIGHT"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="rightID" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="ID"/>
</field>
<field name="rightName">
<extension vendor-name="kodo" key="data-column" value="Name"/>
</field>
<field name="groups">
<collection element-type="Group"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>
<extension vendor-name="kodo" key="groupid-data-column" value="GROUPID"/>
<extension vendor-name="kodo" key="rightid-ref-column" value="RIGHTID"/>
<extension vendor-name="kodo" key="inverse" value="rights"/>
</field>
</class>
<class name="Group" identity-type="application" objectid-class="GroupID">
<extension vendor-name="kodo" key="table" value="JDO_TEST_GROUP"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="groupID" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="name"/>
</field>
<field name="rights">
<collection element-type="Right"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>
<extension vendor-name="kodo" key="rightid-data-column" value="RIGHTID"/>
<extension vendor-name="kodo" key="groupid-ref-column" value="GROUPID"/>
<extension vendor-name="kodo" key="inverse" value="groups"/>
</field>
</class>
BUT when table is created it has additional fields:
JDO_TEST_GROUP_RIGHT_LINKS
GROUPID | GROUP_GROUPSX | GROUPID_JDOIDX | RIGHTID_JDOIDX |
RIGHTID_RIGHTSX
Does anyone know what am I doing wrong? (I did it according documentation
on 2.4.1)
Also, tables for Group and Right have extra Kodo fields (JDOCLASSX,
JDOLOCKX)
but in METADATA I did specify:
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
Is anything else there to specify?
thanks in advance,
Ruslan Zenin
I'm guessing you meant to show List rights instead of List users...
You have to be case sensitive with your keys... e.g. rightID-ref-column,
groupID-ref-column.
Hope that solves your problem.
Ruslan Zenin wrote:
>
class Group
private String groupID; //key
private List users;
public List getUsers()
here is my JDO metadata:
<field name="groups">
<collection element-type="Group"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>here...
<extension vendor-name="kodo" key="groupid-data-column" value="GROUPID"/>and here..
<extension vendor-name="kodo" key="rightid-ref-column" value="RIGHTID"/>
<extension vendor-name="kodo" key="inverse" value="rights"/>
</field>
</class>
<class name="Group" identity-type="application" objectid-class="GroupID">
<extension vendor-name="kodo" key="table" value="JDO_TEST_GROUP"/>
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
<field name="groupID" primary-key="true">
<extension vendor-name="kodo" key="data-column" value="name"/>
</field>
<field name="rights">
<collection element-type="Right"/>
<extension vendor-name="kodo" key="table"
value="JDO_TEST_GROUP_RIGHT_LINKS"/>again...
<extension vendor-name="kodo" key="rightid-data-column" value="RIGHTID"/>and one last time...
<extension vendor-name="kodo" key="groupid-ref-column" value="GROUPID"/>
<extension vendor-name="kodo" key="inverse" value="groups"/>
</field>
</class>
BUT when table is created it has additional fields:
JDO_TEST_GROUP_RIGHT_LINKS
GROUPID | GROUP_GROUPSX | GROUPID_JDOIDX | RIGHTID_JDOIDX |
RIGHTID_RIGHTSX
Does anyone know what am I doing wrong? (I did it according documentation
on 2.4.1)
Also, tables for Group and Right have extra Kodo fields (JDOCLASSX,
JDOLOCKX)
but in METADATA I did specify:
<extension vendor-name="kodo" key="lock-column" value="none"/>
<extension vendor-name="kodo" key="class-column" value="none"/>
Is anything else there to specify?
thanks in advance,
Ruslan Zenin
Stephen Kim
[email protected]
SolarMetric, Inc.
http://www.solarmetric.com
Similar Messages
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Hibernate - Spring - problem with mapping (many-to-many)
Hello,
I want to map the following situation. I have a table called EDUCATION and a table called SCHOOLS. Between those tables I have an associative table called EDUCATION_SCHOOLS. The (usefull) fields:
EDUCATION:
id (long) - PK
name (varchar)
versionNr (long)
SCHOOLS:
id (long) - PK
name (varchar)
versionNr (long)
EDUCATION_SCHOOLS:
id (long) - PK
education_id (long) (FK to EDUCATION.id)
school_id (long) (FK to SCHOOLS.id)
name (varchar)
versionNr (long)
Their is a Unique Constraint between EDUCATION_SCHOOLS.education_id and EDUCATION_SCHOOLS.school_id.
What I want to be able to do:
EDUCATION: select, update, insert
SCHOOLS: select, update, insert
EDUCATION_SCHOOLS: select, update (only the non-FK fields), insert
I never want to delete anything in those tables. (and it's never ever going to be an option either)
Hibernate version:
Hibernate-Version: 3.0.5
Mapping documents:
Education:
<hibernate-mapping>
<class name="##.Education" table="EDUCATION">
<id name="id" column="ID" type="java.lang.Long">
<generator class="sequence">
<param name="sequence">EDUCATION_SEQ</param>
</generator>
</id>
<version name="versionNr" column="VERSIONNR" type="long"/>
<property name="name" column="NAME" type="string" />
<set name="SCHOOLS" table="EDUCATION_SCHOOLS">
<key column="EDUCATION_ID" />
<many-to-many class="##.Schools" column="SCHOOL_ID" lazy="false" />
</set>
</hibernate-mapping>
Schools:
<hibernate-mapping>
<class name="##.Schools" table="SCHOOLS">
<id name="id" column="ID" type="java.lang.Long">
<generator class="sequence">
<param name="sequence">SCHOOLS_SEQ</param>
</generator>
</id>
<version name="versionNr" column="VERSIONNR" type="long"/>
<property name="name" column="NAAM_NAME" type="string" />
<set name="educations" table="EDUCATION_SCHOOLS" inverse="true" cascade="none">
<key column="SCHOOL_ID" />
<many-to-many class="##.Schools" column="SCHOOL_ID" lazy="proxy"/>
</set>
</hibernate-mapping>
Education_schools:
<hibernate-mapping>
<class name="##.EducationSchools" table="EDUCATION_SCHOOLS">
<id name="id" column="ID" type="java.lang.Long" unsaved-value="0">
<generator class="sequence">
<param name="sequence">SEQ_EDUCATION_SCHOOLS</param>
</generator>
</id>
<version name="versionNr" column="VERSIONNR" type="long" />
<many-to-one name="education" class="##.Education" cascade="none" lazy="proxy"
column="EDUCATION_ID" not-null="true"/>
<many-to-one name="schools" class="##.Schools" cascade="none" lazy="proxy"
column="SCHOOL_ID" not-null="true"/>
</hibernate-mapping>
Name and version of the database you are using:
Oracle XE 10g
I am able to:
EDUCATION: select, insert, update
SCHOOLS: select, insert, update
EDUCATION_SCHOOLS: select
Problems:
EDUCATION_SCHOOLS: when I try to insert, I sometimes get unique constraint violations. (when I should get them, thus I'm trying to insert something that already exists .. but how do I stop Hibernate from Inserting?)
EDUCATION_SCHOOLS: when I try to update, sometimes it works, but often I get:
23:03:55,484 [http-8081-1] ERROR be.vlaanderen.lne.vea.epb.ui.struts.EpbExceptionHandler - org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [##.EducationSchools] with identifier [null]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [##.EducationSchools#<null>]
ex.getMessage() Object of class [##.EducationSchools] with identifier [null]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [##.EducationSchools#<null>]
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [##.EducationSchools] with identifier [null]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [##.EducationSchools#<null>]
Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect):As you can see from the stacktrace I use Spring for the transactionManager: org.springframework.orm.hibernate3.HibernateTransactionManager in which I use e sessionFactory: org.springframework.orm.hibernate3.LocalSessionFactoryBean
In my DAO, I try to save with the regular this.getHibernateTemplate().saveOrUpdate that has always worked for me.
Another problem I have:
when i update "name" in EDUCATION, the records with that ID are delete from EDUCATION_SCHOOLS ...
As I am experiencing 3 different problems, I'm pretty sure something is wrong in the mapping files .. however I fail to find out what .. Any input would be greatly appreciated.
(I translated some class/table-names, that's what the ## cause)
Edited by: Bart_Blommaerts on Jul 29, 2008 11:53 PMThank you for your input.
When I try what you suggest, I still get the same error:
16:39:30,406 [http-8081-1] ERROR ###.EpbExceptionHandler - org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [###.EducationSchools] with identifier [2]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]
ex.getMessage() Object of class [###.EducationSchools] with identifier [2]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]
org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [###.EducationSchools] with identifier [2]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]
Caused by: org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [###.EducationSchools#2]If you had to map the database tables, I'm trying to map, how would you do it? -
Many to many relationship mapping.
Hi
I have a basic question on how to create a good java class model (POJOs) based on the database model.
I Have to follwing tables
Table1 with columns as
ID1
name
description
Table2 with columns as
ID2
dateCreated ..etc.
Since there is a many to many relationship between table1 and table2
So to map that we have a table3 with columns
ID3
ID1 // fk table1
ID2 // fk table2
browserName
startTime
endTime
So when I create Java classes:
// corresponding to table 1
Class MyTable1
private Integer ID1;
private List ID2; // to map with the table2
// corresponding to table 2
Class MyTable2
private Integer ID2
private List ID1; // to map with table 1
In this way I can create my classes. Is this the best way to put it together.
And where to put the attributed specific to table3. Like the BrowserName and the StartTime and the EndTime.
Any suggestion please.
Thanks.Your names leave a lot to be desired. Let's start with an example. Suppose I have a problem involving employees and the tasks assigned to them. An employee may have any number of tasks assigned to them and a task can be assigned to any number of employees. The assignment itself has more attributes: when it was assigned, its priority and so on.
public interface Employee {
Long getId(); //etc...
Set<Assignment> getAssignments();
void setAssignments(Set<Assignment> assignments);
public interface Task {
Long getId(); //etc...
Set<Assignment> getAssignments();
void setAssignments(Set<Assignment> assignments);
public interface Assignment {
Long getId(); //etc...
Employee getEmployee();
void setEmployee(Employee employee);
Task getTask();
void setTask(Task task);
}This assumes you want to navigate in all directions: from an employee to their assignments, from a task to its assignments and from an assignment to it employee and task. -
Hi,
I'm working with two classes Car and Customer. The Car class has a Vector of Customers and the Customer class has a Vector of Car. Both are related by a many to many mapping.
I have noticed that I have to set one of the vector to read only to avoid the error message "More than one writable many-to-many mapping can not use the same relation table" in the mapping workbench.
I can understand that but is there a way to work around, I mean to be able to add a car to a customer and add a customer to a car with the both vectors?
Is there something to do with the cache?
I use Vector for the collection or Map class, have I to do otherwise?Hello Vladislav, I understand your first question in this thread, but I'm not sure I follow the rest, so let me respond to your first post:
"I have noticed that I have to set one of the vector to read only to avoid the error message "More than one writable many-to-many mapping can not use the same relation table" in the mapping workbench.
I can understand that but is there a way to work around, I mean to be able to add a car to a customer and add a customer to a car with the both vectors?"
The issue here is that with a Many to Many mapping the mapping is responsible for writing to the association table. So, you have a "CAR_CUST" association table. Imagine you add a Car "101" to a customer "501" and the requisite customer "501" to that car "101" in your object model. Then the association table should only be updated once, with an entry of "101, 501". But since the M-M is mapped in both directions, you need to tell TopLink which of these to consider as the "master" when updating the database.
If you didn't make one of the M-M mappings "read only", then TopLink would insert "101, 501" twice in the association table, and then at a later date you would see that the customer 501 had two 101 cars!
We do have a feature that allows for TopLink to maintain bidirectional relationships such that if you add or remove a target from one relationship, TopLink will automatically add/remove it from the opposite direction. In my opinion this is lazy programming! A good Java developer should insist on keeping his model up to date on his own. This feature was added because it's part of the EJB spec, not necessarily because it's a good idea ;)
- Don
Is there something to do with the cache?
I use Vector for the collection or Map class, have I to do otherwise? -
Problem in mapping a many to many relation to a list
Hi,
I have a problem with mapping a many to many relation to a list.
I have a Many to Many relation in my database between tables baskets and products. This relation is implemented with a join table basket_products, which has two fields which correspond to the foreign keys to tables baskets and products. The join table need to have another one column "order", which defines the order of the products for the specific basket.
In my mapping I have:
@Entity
@Table(name = "baskets", uniqueConstraints = {})
public class Components implements java.io.Serializable {
@ManyToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY)
@JoinTable( name="baskets_products",
joinColumns=@JoinColumn(name="b_id", referencedColumnName="pr_id"),
inverseJoinColumns=@JoinColumn(name="pr_id", referencedColumnName="pr_id"))
//This of course doesn't work!!
//@OrderBy(value="order")
public List<Products> getProductses() {
return this.productses;
public void setProductses(
List<Products> productses) {
this.productses = productses;
@Entity
@Table(name = "products", uniqueConstraints = { })
public class Products implements java.io.Serializable {
@ManyToMany(cascade = { CascadeType.ALL }, fetch = FetchType.LAZY, mappedBy = "productses")
public Set<Baskets> getBasketses() {
return this.basketses;
public void setBasketses(Set<Basket> basketses) {
this.basketses = basketses;
}In the EJB spec I read that :
"The property or field name must correspond to that of a persistent property or field of the associated
class."
What to do if I want to use a field from the join table to do the ordering of the list??
My problem is that the field "order", is not defined to the EJB container as a persistent field, so it cannot be used. But for my needs it is necessary that this field is included in the join table.
I thought that I could use the secondary table annotation to map the join table to the Baskets class, as well, so that I can define the order field, but this solution seems to me as a really wrong one.
Can anyone help me??
Thanks,
Elenh.Hi Martin-
Can you please help me. Here are the details:
We have created an AQ in Oracle DB which will have the following message Structure:
CREATE OR REPLACE TYPE enqueue_payload AS OBJECT
( field1 VARCHAR2(100),
field2 VARCHAR2(100),
field3 DATE,
field4 VARCHAR2(100),
field5 NUMBER,
payload CLOB,
In the Payload field we are enqueing an XML message.
We have to use a OSB proxy service to dequeue the message from the AQ, transform it to another format and send to a SOA Composite.
We created a AQ Adapter in Jdeveloper 11g and imported the WSDL, XSD and .jca jca binding file into the OSB project. And configured the OSB proxy service using the WSDL imported.
However in OSB proxy service message flow when I try to create an XQUERY transformation, I see that the Payload field does not expose the structure of the XML message that is being enqueued. I even changed the message structure definition to have the payload field as XMLType. But it didn't help.
On analyzing the XSD created by AQ Adapter, I see that the payload is being defined as "string" in the XSD.
Inputs Needed
=========
1. How can we parse the payload field defined as CLOB/XMLType in OSB so that I can see the structure of the XML message it holds ?
2. Is there any in-built function in OSB to convert it to XML ?
3. Any other inputs in order to transform the XML message coming in the payload field as CLOB/XMLType
Please provide your inputs and I hope that I have clearly explained my use case.
Thanks in advance for your time and help!!
Regards,
Dibya -
Mapping issue, "many to many" mapping
Hi specialists!
I have to map this structure:
source
segment_1 (1...n)
key_1
aaa
bbb
segment_2 (1...n)
key_2
ccc
ddd
Target:
segment_2
ccc
ddd
The condition is segment_1=>key1 = segment_2=>key2
The problem is that I need to check each segment_1 with each segment_2.
Is it possible using standard mapping functions?Dani_K,
This can be done with standard mapping if your source.segment_1.key_1 is unique. If it is not, you could end up with a many to many mapping which would be difficult no matter how you map.
Try this:
For segment_2
source.segment_1.key_1 (right click, context, source) ---> sort --->
source.segment_2.key_2 (right click, context, source) ---> sort --->
equalsS ---> ifWithoutElse --->
source.segment_2 (then)
removeContexts (after the If Then)---> target.segment_2
For ccc
source.segment_1.key_1 (right click, context, source) ---> sort --->
source.segment_2.key_2 (right click, context, source) ---> sort --->
equalsS ---> ifWithoutElse --->
source.segment_1.ccc (right click, context, source) (then)
removeContexts (after the If Then)---> SplitByValue(Each Value) ---> target.segment_2.ccc
For ddd
source.segment_1.key_1 (right click, context, source) ---> sort --->
source.segment_2.key_2 (right click, context, source) ---> sort --->
equalsS ---> ifWithoutElse --->
source.segment_1.ddd (right click, context, source) (then)
removeContexts (after the If Then)---> SplitByValue(Each Value) ---> target.segment_2.ddd
Ideally, the segment_1.Key_1 and segment_2.key_2 are sorted before you process the message. If so, remove the sort above. -
Toplink - Many-to-Many Mapping issue
Hi
I have the following tables
User
Place
Team
User : uid , name (where uid is primay key)
Place : uid , pid( where uid and pid are composite primary keys)
Team : tid , name , pid( where tid is primary key)
Here the following mappings :
one user is belongs to many places
one user have many teams( by place)
user have many teams
i have created many to many mapping between place(or user) and team tables using intermediate table user_team( uid ,tid). But when i try to retrieve the teams for user id then i m getting all the teams. Here i need to filter the teams by only place id instead getting all the teams.
For example:
if user id is belongs to place id 101 then i need to get only teams belongs to place id 101. But i m getting all the places(101,102) teams for same user id which belongs to place id 101.
Please help me out how i can create valide mapping between all the tables to retrieve valid data. i m using toplink workbench(10g - 9.0.4).Your model seems confused, you may wish to re-think you model. It seems odd that a place would have a user id, seems more like it is a m-m join table between user and team, but then it should have a team id not a place id.
You can use a selectionCriteria() on a ManyToManyMapping to define complicated m-m joins, but you would probably be better re-thinking your model. What object model are you trying to do exactly? Go from there, then define your data-model.
-- James : http://www.eclipselink.org -
Hi Experts,
I am currently facing issue with many to one mapping . I have a source schema called revenue having Profit and Profit GST which is looping multiple times. I need to copy the name,value and GST value for each type into the destination schema.
i am using Looping funtiod to create item profit records and than copying name and value from source to destination but the problem statement is that i am unable to map the GST value
Thanks
Abhishekcould you post the schema definition please
well why i am asking is, in General matching the records will be based on common node values in corresponding records.
Assume you have 2 records of Profit and 2 records of ProfitGST in the source message like below, you cannot match the records unless you have some value common in both the records. i mean there should be some common node or attribute value that exits in
both records.
assume the following sample with 2 records each
<ns0:Revenue xmlns:ns0="http://TestSample">
<ns0:profit availabilityIncentivePayment="342" increasedCapacityCharge ="121" increasedCapacaityPayment="231" />
<ns0:profit availabilityIncentivePayment="100" increasedCapacityCharge ="110" increasedCapacaityPayment="120" />
<ns0:profitGST availabilityIncentivePayment="55" increasedCapacityCharge ="21" increasedCapacaityPayment="23"/>
<ns0:profitGST availabilityIncentivePayment="150" increasedCapacityCharge ="160" increasedCapacaityPayment="170"/>
</ns0:Revenue>
if you observe the above sample instance, it does have 2 records each, but Profit record's nodes values
are no where common with ProftGST record's node values.
And for every Profit record, you want to pick corresponding GST value from ProfitGST record. However, since you don't have atleast one common node/attribute value here, you will not find a way to relate corresponding records. Means while mapping the first
record of Profit, it cannot decide which record's nodes values in the ProftGST should pick to match as there are 2 records of ProfitGSt and with no relation with Profit Records.
if the requirement is such that the records should be matched by the order(index) irrespective
or the values in them, then that can be achieved easily with postion() function in the for loop. just try to use code some thing like below sample xslt script like below, apply the proper name spaces and put full names as applicable in your scirpt, mould
it as per your need
<ns0:Root>
<xsl:for-each select="Profit">
<Profit>
<xsl:if test="@availabilityIncentivePayment">
<name>
name>availabilityIncentivePayment</name>
</name>
</xsl:if>
<xsl:if test="@increasedCapacityCharge">
<Value>
<xsl:value-of select="@increasedCapacityCharge" />
</Value>
</xsl:if>
<xsl:if test="../profitGST/@availabilityIncentivePayment">
<ProfitGSt>
<xsl:value-of select="../profitGST/@availabilityIncentivePayment[position()]" />
</ProfitGSt>
</xsl:if>
</Profit>
</xsl:for-each>
</ns0:Root>
Please mark the post as answer if this answers your question. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply. -
OLAP issue with MANY TO MANY mapping
Hi All,
We have a requirement where we have to pull specific measures & associated dimensions data from an OLAP to SQL tables. The source cube has almost 80 % of MANY TO MANY mappings.
When we pull this data to SQL tables either by writing MDX or DMX dimension level metric values are not matching with what OLAP browsing is providing.
When we pull this measure with only regular dimensions metric values with all dimensions exactly match. The mismatch issue comes when we have at least 1 MANY TO MANY dimension part of MDX or DMX query. Further to this we have pulled all intermediate facts
& dimensions involved in MANY TO MANY mapping into SQL tables & tried a number of JOINS but the metric values haven’t match up.
We are very close on delivery dates & are not sure on any resolution. Could you please guide us on next steps here.
Thanks is advance.Hi All,
We have a requirement where we have to pull specific measures & associated dimensions data from an OLAP to SQL tables. The source cube has almost 80 % of MANY TO MANY mappings.
When we pull this data to SQL tables either by writing MDX or DMX dimension level metric values are not matching with what OLAP browsing is providing.
When we pull this measure with only regular dimensions metric values with all dimensions exactly match. The mismatch issue comes when we have at least 1 MANY TO MANY dimension part of MDX or DMX query. Further to this we have pulled all intermediate facts
& dimensions involved in MANY TO MANY mapping into SQL tables & tried a number of JOINS but the metric values haven’t match up.
We are very close on delivery dates & are not sure on any resolution. Could you please guide us on next steps here.
Thanks is advance. -
Take2 - Many-to-Many mapping on a single object/table via an external table.
Plaease ignore the previous entry. Finger trouble on the keyboard
accidentally posted prior to completion!
Any takers on this one? If its simple, then great.
I currently have a problem making the correct meta-data via xdoclet for a
collection with a many-to-many mapping between an enhanced class and an
xref table (which does not have an enhanced class associated with it.)
Although page 184 of the Kodo JDO 3.01 Developers guide does spell out in
fairly academic terms what has to be done, it still seems fairly
impenetrable, after much mangling and hacking.
As far as I can see the significantly questionable attributes are:-
element-column.<pk column>*
and
ref-column.<pk column>*
The asterisks and the associated texts indicate that these entries can be
specified more than once.
Here is my Meta data.
* @jdo.field collection-type="collection"
element-type="com.letsys.erespond.business.model.event.Condition"
* @jdo.field-vendor-extension vendor-name="kodo" key="jdbc-field-map"
value="many-many"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/table" value="EventConditionConditionXref"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/element-column.ID" value="EVENTCONDITIONID"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/ref-column.EVENTCONDITIONID" value="ID"
private Collection groupsToConditions;
Here is the basic table which I wish to use for the xref
create table EventConditionConditionXref(
EventConditionId NUMBER(10) NOT NULL primary key,
EventConditionIdGroupTo NUMBER(10) NOT NULL primary key
The EventCondition class and table uses a field 'id' as its primary key.
The intention is the xref table will hold many-many associations between
multiple EventCondition.id instances in the underlying database.
Thus the joing condition would be :
select
EventConditionIdGroupTo
from
EventCondition ec, EventConditionConditionXref ecx
where
ec.id = ecx.EventConditionId
There are numerous variations that I have squeezed through it, but the net
effect has always been
BUILD FAILED
file:C:/dev/projectm/build.xml:303:
kodo.jdbc.meta.MappingInfoNotFoundException: The mapping for fie
ld "com.letsys.erespond.business.model.event.Condition.groupsToConditions"
is missing information on
how to link the fields table to its owning class table, or the given
information is invalid.
I have tried many interpretations as to how
element-column.<pk column>*
and
ref-column.<pk column>*
should be represented, but always with the same 'not enough info' message.
Am I missing something obvious, and/or not understanding something?
Cheers Ed.Ed-
I think what you want is:
@jdo.field collection-type="collection"
element-type="com.letsys.erespond.business.model.event.Condition"
@jdo.field-vendor-extension vendor-name="kodo" key="jdbc-field-map"
value="many-many"
@jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/table" value="EventConditionConditionXref"
@jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/ref-column.ID" value="EVENTCONDITIONID"
@jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/element-column.ID" value="EVENTCONDITIONIDGROUPTO"
Basically, the "ref-column.<primary key>" specifies the column in the
join table that holds the primary key of the source side of the relation
(the current class), and the "element-column.<primary key>" specifies
the column in the join table that holds the primary key of the
destination side of the relation (the content of the Collection field).
Since it appears that you want the relation to be from Condition to
Condition (i.e., have a relation it itself), the primary key in both
cases will be the 'ID' column.
Let us know if you still have problems with this. You might want to
check out our graphical mapping workbench in 3.1, which helps greatly
simplify composing your mappings.
In article <[email protected]>, Ed Bett wrote:
Plaease ignore the previous entry. Finger trouble on the keyboard
accidentally posted prior to completion!
Any takers on this one? If its simple, then great.
I currently have a problem making the correct meta-data via xdoclet for a
collection with a many-to-many mapping between an enhanced class and an
xref table (which does not have an enhanced class associated with it.)
Although page 184 of the Kodo JDO 3.01 Developers guide does spell out in
fairly academic terms what has to be done, it still seems fairly
impenetrable, after much mangling and hacking.
As far as I can see the significantly questionable attributes are:-
element-column.<pk column>*
and
ref-column.<pk column>*
The asterisks and the associated texts indicate that these entries can be
specified more than once.
Here is my Meta data.
* @jdo.field collection-type="collection"
element-type="com.letsys.erespond.business.model.event.Condition"
* @jdo.field-vendor-extension vendor-name="kodo" key="jdbc-field-map"
value="many-many"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/table" value="EventConditionConditionXref"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/element-column.ID" value="EVENTCONDITIONID"
* @jdo.field-vendor-extension vendor-name="kodo"
key="jdbc-field-map/ref-column.EVENTCONDITIONID" value="ID"
private Collection groupsToConditions;
Here is the basic table which I wish to use for the xref
create table EventConditionConditionXref(
EventConditionId NUMBER(10) NOT NULL primary key,
EventConditionIdGroupTo NUMBER(10) NOT NULL primary key
The EventCondition class and table uses a field 'id' as its primary key.
The intention is the xref table will hold many-many associations between
multiple EventCondition.id instances in the underlying database.
Thus the joing condition would be :
select
EventConditionIdGroupTo
from
EventCondition ec, EventConditionConditionXref ecx
where
ec.id = ecx.EventConditionId
There are numerous variations that I have squeezed through it, but the net
effect has always been
BUILD FAILED
file:C:/dev/projectm/build.xml:303:
kodo.jdbc.meta.MappingInfoNotFoundException: The mapping for fie
ld "com.letsys.erespond.business.model.event.Condition.groupsToConditions"
is missing information on
how to link the fields table to its owning class table, or the given
information is invalid.
I have tried many interpretations as to how
element-column.<pk column>*
and
ref-column.<pk column>*
should be represented, but always with the same 'not enough info' message.
Am I missing something obvious, and/or not understanding something?
Cheers Ed.
Marc Prud'hommeaux [email protected]
SolarMetric Inc. http://www.solarmetric.com -
Valueholderinterface - Many-to-Many mapping problem
Hi
i have two tables users and teams and i have created many-to-many relationship between two table through intermediated(users_teams) table. Here user can have many teams and team can have many users.But the following exception i m getting while getting teams from user and users from team.
Caused by: Exception [TOPLINK-0] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311
)): oracle.toplink.exceptions.IntegrityException
Descriptor Exceptions:
Exception [TOPLINK-2] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [teams] is declared as type ValueHolderIn
terface, but its mapping does not use indirection.
Mapping: oracle.toplink.mappings.ManyToManyMapping[teams]
Descriptor: Descriptor(com.test.Users --> [DatabaseTable(USERS)])
Exception [TOPLINK-7] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [teams] should be of type Vector (or a ty
pe that implements Map or Collection, if using Java 2).
Mapping: oracle.toplink.mappings.ManyToManyMapping[teams]
Descriptor: Descriptor(com.test.Users --> [DatabaseTable(USERS)])
Exception [TOPLINK-2] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [users] is declared as type ValueHolderIn
terface, but its mapping does not use indirection.
Mapping: oracle.toplink.mappings.ManyToManyMapping[users]
Descriptor: Descriptor(com.test.Teams --> [DatabaseTable(TEAMS)])
Exception [TOPLINK-7] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracle.
toplink.exceptions.DescriptorException
Exception Description: The attribute [users] should be of type Vector (or a ty
pe that implements Map or Collection, if using Java 2).
Mapping: oracle.toplink.mappings.ManyToManyMapping[users]
Descriptor: Descriptor(com.test.Teams --> [DatabaseTable(TEAMS)])
Exception [TOPLINK-163] (OracleAS TopLink - 10g (9.0.4.2) (Build 040311)): oracl
e.toplink.exceptions.DescriptorException
Exception Description: This mapping's attribute class does not match the collect
ion class. [class java.util.Vector] cannot be assigned to [interface oracle.top
link.indirection.ValueHolderInterface].
Please help me out to resolve this problem.Either use indirection in your mappings, or change you class to just use a normal collection, not a ValueHolderInterface.
-- James : http://www.eclipselink.org -
Thanks for looking at my question.
How do I write a query to find values in a many to many relationship?
My tables are normalized similarly to this:
http://download.oracle.com/docs/cd/B25221_05/web.1013/b13593/relmapun008.htm#CHDFDIHC
How can i write a query for 'Jane Smith' that would return all of the projects ('Java Developer', 'Magazine') he is working on? Or, vise versa a query for a project that would return all of the employees mapped to it by the relationship table?
Edited by: 869021 on Jun 28, 2011 4:00 PMThanks for the reply. I think it is a little beyond me. I am four weeks into a beginning Data modeling class. I will definitely come back and look at it again later.
I came up with this solution. Just nesting selects until I can query across the relationships.
DROP TABLE Stock;
DROP TABLE Model;
DROP TABLE Dealer;
CREATE TABLE Dealer(
DealerID NUMBER,
DealerName VARCHAR2(20),
CONSTRAINT pk_Dealership PRIMARY KEY (DealerID)
CREATE TABLE Model(
ModelNumber NUMBER,
ModelName VARCHAR2(20),
CONSTRAINT pk_Model PRIMARY KEY (ModelNumber)
CREATE TABLE Stock(
StockKey NUMBER,
ModelNumber NUMBER,
DealerID NUMBER,
CONSTRAINT pk_Stock PRIMARY KEY (StockKey),
CONSTRAINT fk_ModelNumber FOREIGN KEY (ModelNumber) REFERENCES Model (ModelNumber),
CONSTRAINT fk_DealerID FOREIGN KEY (DealerID) REFERENCES Dealer (DealerID)
INSERT INTO Dealer VALUES(1, 'Midnight Movers');
INSERT INTO Dealer VALUES(2, 'Bubbas Imports');
INSERT INTO Dealer VALUES(3, 'Import Motors');
INSERT INTO Model VALUES(1, 'Buick Skylark');
INSERT INTO Model VALUES(2, 'H2 Hummer');
INSERT INTO Model VALUES(3, 'Chevy Suburban');
INSERT INTO Model VALUES(4, 'BMW Z3');
INSERT INTO Model VALUES(5, 'BMW 328i');
INSERT INTO Model VALUES(6, 'Jeep Wrangler');
INSERT INTO Model VALUES(7, 'Ford Focus');
INSERT INTO Model VALUES(8, 'Range Rover');
INSERT INTO Model VALUES(9, 'Toyota Supera');
INSERT INTO Model VALUES(10, 'Ferrari Testarosa');
INSERT INTO Model VALUES(11, 'Jaguar X12');
INSERT INTO Model VALUES(12, 'Ford Fairmont');
INSERT INTO Stock VALUES(1, 1, 1);
INSERT INTO Stock VALUES(2, 2, 1);
INSERT INTO Stock VALUES(3, 3, 1);
INSERT INTO Stock VALUES(4, 4, 1);
INSERT INTO Stock VALUES(5, 5, 1);
INSERT INTO Stock VALUES(6, 6, 1);
INSERT INTO Stock VALUES(7, 1, 2);
INSERT INTO Stock VALUES(8, 2, 2);
INSERT INTO Stock VALUES(9, 1, 2);
INSERT INTO Stock VALUES(10, 4, 2);
INSERT INTO Stock VALUES(11, 5, 2);
INSERT INTO Stock VALUES(12, 6, 2);
INSERT INTO Stock VALUES(13, 7, 3);
INSERT INTO Stock VALUES(14, 8, 3);
INSERT INTO Stock VALUES(15, 9, 3);
INSERT INTO Stock VALUES(16, 10, 3);
INSERT INTO Stock VALUES(17, 11, 3);
INSERT INTO Stock VALUES(18, 12, 3);
--find all stock at Import Motors
SELECT * FROM Model
WHERE ModelNumber IN
(SELECT DISTINCT Stock.ModelNumber
FROM Stock WHERE Stock.DealerID = (
SELECT Dealer.DealerID
FROM Dealer WHERE Dealer.DealerName = 'Import Motors'
--find all dealers with BMW Z3
SELECT * FROM Dealer
WHERE DealerID IN
(SELECT DISTINCT Stock.DealerID
FROM Stock WHERE Stock.ModelNumber = (
SELECT Model.ModelNumber
FROM Model WHERE Model.ModelName = 'BMW Z3'
); -
We have several situations where we link tables with many-to-many relationships. We are having trouble modeling this with ODSI such that create, update, and delete operations work reliably. The problem is that the link table record needs to be created only after the related items are created, so that the primary keys exist before the foreign key record is inserted. On delete operations, the reverse is true: the link record must be deleted prior to the others, or foreign key constraints are violated. Can you please suggest a model that will accomodate this situation properly?
Thank you!
JeffI suspect the update cannot be done via a master->link->slave data service as ODSI has no way of knowing which which one of the slave records should be updated for a specific link. Does that make sense?
But your real problem is the referential integrity constraint. The last time I looked at many-to-many (ALDSP 2.x), I found that ds updates were executed in a deterministic order - which was determined by the iterator returned from HashMap (or something similarly unhelpful). And the solution was to write your own "update override" implementation. In ALDSP 3.x and ODSI 10.3 there is the update mapping and failing that you can write your own create/delete procedures. I know that is not terribly helpful, but that's all I have to offer without investigating.
- mike -
Many to many relationships (Again)
Hello,
There was a posting on above subject.
Re: Many to many relationships between Fact and Dimension
They asked to look chapter 3 in the user's guide... <http://download.oracle.com/docs/pdf/B10996_01.pdf>. chapter 3 talks about defining Oracle Data Objects. I could find above subject in chapter 3 .
Here is our situation We are using OWB 9.2.0.2.8. We are in a situation to build ETL from denormalized (relational tables) source to normalized target (relational tables). It is not a data warehouse situation. It could be a reverse of data warehouse. As given below
Supplier >--------------------<Item
becomes Supplier ------<supp_item.>--------------Item after many to many resolution, Where supp_item is interface table.
We were able build Supplier and Item through seprate mapping. I could build supp_item through post mapping process. I look for alternate thought as well.
We are using separate sequence number for Supplier , Item and supp_item. The sequences will be surrogate keys such as Supplier ( Suppseq(PK)), Item (Itemseq (PK)) and supp_item(suppitemseq (PK)) Here is the sample
Supplier
001|S001
002|S002
003|S003
004|S004
Item
001|I001
002|I002
003|I003
Supp_item (Suppseq|ItemSeq)
001|002 --- S001 I002
001003 -----S001 I003
001|004 ----- S001 I 004
002|002 ---- S 002 I002
002|003 ---- S 002 I003
003|001 --- S 003 I 003
003|003 --- S 003 I 003
Did any body face such situation? What is the best way to create a mapping (single map or multiple map with processflow sequence) for this situation?
Let me know the steps exercised in OWB for this situation.
I appreciate your help.
Regards
RamHi Ram,
The easiest way to do this, would be to:
- Load supplier in one mapping and generate the surrogate key.
- Load item another (or the same) mapping and generate the surrogate key.
- Load supplier_item in its own separate mapping, using a key lookup (or join) to (with) the supplier and item tables.
Needless to say, you should create unique keys on the natural key of the supplier and item tables, to enable quick index-based lookups and make sure you get one unique value for every value of the natural key.
Hope this helps,
Mark. -
Defining a many-to-many relationship with CMP EJBs : does it work for you
Curious to know whether someone has been able to set up a many to many relationship between two entity beans.
I have been struggling with this for days now and I can't get it to work.
In my test project I have two entity beans, resp. Consultant and Solution.
Consultant has a cmr field called 'solutions', which is a collection object from the opposite side (Solution).
This is the source of the ejb-jar.xml file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
<ejb-jar>
<description>EJB JAR description</description>
<display-name>EJB JAR</display-name>
<enterprise-beans>
<session>
<ejb-name>ProfilerBean</ejb-name>
<home>com.atosorigin.tcc.testing.ejbses.profiling.ProfilerHome</home>
<remote>com.atosorigin.tcc.testing.ejbses.profiling.Profiler</remote>
<local-home>com.atosorigin.tcc.testing.ejbses.profiling.ProfilerLocalHome</local-home>
<local>com.atosorigin.tcc.testing.ejbses.profiling.ProfilerLocal</local>
<ejb-class>com.atosorigin.tcc.testing.ejbses.profiling.ProfilerBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Container</transaction-type>
<ejb-local-ref>
<ejb-ref-name>EJBTesting/Solution</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<local-home>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionLocalHome</local-home>
<local>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionLocal</local>
<ejb-link>SolutionBean</ejb-link>
</ejb-local-ref>
<ejb-local-ref>
<ejb-ref-name>EJBTesting/Consultant</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<local-home>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantLocalHome</local-home>
<local>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantLocal</local>
<ejb-link>ConsultantBean</ejb-link>
</ejb-local-ref>
</session>
<entity>
<ejb-name>ConsultantBean</ejb-name>
<home>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantHome</home>
<remote>com.atosorigin.tcc.testing.ejbcmp.profiling.Consultant</remote>
<local-home>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantLocalHome</local-home>
<local>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantLocal</local>
<ejb-class>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantBean</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>Consultant</abstract-schema-name>
<cmp-field>
<field-name>firstname</field-name>
</cmp-field>
<cmp-field>
<field-name>lastname</field-name>
</cmp-field>
<cmp-field>
<field-name>country</field-name>
</cmp-field>
<cmp-field>
<field-name>id</field-name>
</cmp-field>
<primkey-field>id</primkey-field>
<query>
<query-method>
<method-name>findBySolution</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
</query-method>
<ejb-ql>SELECT Object(c) FROM Consultant AS c,
IN(c.solutions) s WHERE s.id = ?1 </ejb-ql>
</query>
</entity>
<entity>
<ejb-name>SolutionBean</ejb-name>
<home>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionHome</home>
<remote>com.atosorigin.tcc.testing.ejbcmp.profiling.Solution</remote>
<local-home>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionLocalHome</local-home>
<local>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionLocal</local>
<ejb-class>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionBean</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>Solution</abstract-schema-name>
<cmp-field>
<field-name>description</field-name>
</cmp-field>
<cmp-field>
<field-name>name</field-name>
</cmp-field>
<cmp-field>
<field-name>parent</field-name>
</cmp-field>
<cmp-field>
<field-name>id</field-name>
</cmp-field>
<primkey-field>id</primkey-field>
<query>
<query-method>
<method-name>findChildSolutions</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
</query-method>
<ejb-ql>SELECT Object(s) FROM Solution AS s WHERE
s.parent = ?1</ejb-ql>
</query>
<query>
<query-method>
<method-name>findTopLevelSolutions</method-name>
<method-params/>
</query-method>
<ejb-ql>Select Object(s) FROM Solution AS s WHERE
(s.parent = 'none')</ejb-ql>
</query>
</entity>
</enterprise-beans>
<relationships>
<ejb-relation>
<description>A consultant may have one or more areas of expertise</description>
<ejb-relation-name>Consultant_Solutions</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>com.atosorigin.tcc.testing.ejbcmp.profiling.ConsultantBean</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<relationship-role-source>
<ejb-name>ConsultantBean</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>solutions</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>com.atosorigin.tcc.testing.ejbcmp.profiling.SolutionBean</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<relationship-role-source>
<ejb-name>SolutionBean</ejb-name>
</relationship-role-source>
</ejb-relationship-role>
</ejb-relation>
</relationships>
<assembly-descriptor>
<container-transaction>
<description>container-transaction</description>
<method>
<ejb-name>SolutionBean</ejb-name>
<method-name>*</method-name>
</method>
<method>
<ejb-name>ProfilerBean</ejb-name>
<method-name>*</method-name>
</method>
<method>
<ejb-name>ConsultantBean</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
</ejb-jar>
I created a stateless session bean as a business facade for the two entity beans. I then created a webservice to test the beans.
What works :
- create a consultant
- get a consultant
- create a solution
- get a solution
(basically everything that doesn't involve the relationship field.
However, what doesn't work is the method call assignSolution:
- assign solution : this is implemented as follows
Business Method.
public void assignSolution(String consultantID, String solutionID)
throws ProfilingException {
// TODO : Implement
ConsultantLocal cons = null;
SolutionLocal sol = null;
try {
cons = consHome.findByPrimaryKey(consultantID);
sol = solHome.findByPrimaryKey(solutionID);
Collection solutions = cons.getSolutions();
solutions.add(sol);
//sol.getConsultants().add(cons);
} catch (FinderException ex) {
ex.printStackTrace();
throw new ProfilingException("failed to retrieve data from DB", ex);
As you can see I am trying to use the CM Relationship in this methhod. Adding the solution to a consultant should be as simple as adding a solution object to the collection retrieved with the getSolutions accessor. The Container is expected to persist the information in my MAXDB database.
However this doesn't happen.
The ORM details as defined in the persistent.xml follows :
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE persistent-ejb-map SYSTEM "persistent.dtd">
<persistent-ejb-map>
<locking
type="Table"/>
<db-properties>
<data-source-name>TCC_PORTAL_PROFILER</data-source-name>
<database-vendor
name="SAPDB"/>
</db-properties>
<entity-beans>
<entity-bean>
<ejb-name>ConsultantBean</ejb-name>
<table-name>PFL_CONSULTANTS</table-name>
<field-map
key-type="NoKey">
<field-name>firstname</field-name>
<column>
<column-name>FIRSTNAME</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>lastname</field-name>
<column>
<column-name>LASTNAME</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>country</field-name>
<column>
<column-name>COUNTRY</column-name>
</column>
</field-map>
<field-map
key-type="PrimaryKey">
<field-name>id</field-name>
<column>
<column-name>ID</column-name>
</column>
</field-map>
<finder-descriptor>
<method-name>findBySolution</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
<load-selected-objects
lock="read"/>
</finder-descriptor>
</entity-bean>
<entity-bean>
<ejb-name>SolutionBean</ejb-name>
<table-name>PFL_SAPSOLUTIONS</table-name>
<field-map
key-type="NoKey">
<field-name>description</field-name>
<column>
<column-name>DESCRIPTION</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>name</field-name>
<column>
<column-name>NAME</column-name>
</column>
</field-map>
<field-map
key-type="NoKey">
<field-name>parent</field-name>
<column>
<column-name>PARENTID</column-name>
</column>
</field-map>
<field-map
key-type="PrimaryKey">
<field-name>id</field-name>
<column>
<column-name>ID</column-name>
</column>
</field-map>
<finder-descriptor>
<method-name>findChildSolutions</method-name>
<method-params>
<method-param>java.lang.String</method-param>
</method-params>
<load-selected-objects
lock="read"/>
</finder-descriptor>
<finder-descriptor>
<method-name>findTopLevelSolutions</method-name>
<method-params/>
<load-selected-objects
lock="read"/>
</finder-descriptor>
</entity-bean>
</entity-beans>
<relationships>
<table-relation>
<help-table>PFL_CONS_SOL_MAP</help-table>
<table-relationship-role
key-type="PrimaryKey">
<ejb-name>ConsultantBean</ejb-name>
<cmr-field>solutions</cmr-field>
<fk-column>
<column-name>CONSULTANTID</column-name>
<pk-field-name>id</pk-field-name>
</fk-column>
</table-relationship-role>
<table-relationship-role
key-type="PrimaryKey">
<ejb-name>SolutionBean</ejb-name>
<fk-column>
<column-name>SOLUTIONID</column-name>
<pk-field-name>id</pk-field-name>
</fk-column>
</table-relationship-role>
</table-relation>
</relationships>
</persistent-ejb-map>
The error in the default trace file when calling the method states, there is an "inconsistency in the number of primary keys". Details follow.
#1.5#000F1F188E5C004400000000000010480003E76C80EFD57A#1098880364327#com.sap.engine.services.ejb#com.atosorigin.tcc/EJBCMPProfilingTest#com.sap.engine.services.ejb#Guest#2####4d2b2370281411d9a40d000f1f188e5c#SAPEngine_Application_Thread[impl:3]_31##0#0#Error##Java###
[EXCEPTION]
#1#com.sap.engine.services.ejb.exceptions.BaseRemoteException: Exception in method assignSolution.
at com.atosorigin.tcc.testing.ejbses.profiling.ProfilerObjectImpl0.assignSolution(ProfilerObjectImpl0.java:822)
at com.atosorigin.tcc.testing.ejbses.profiling.Profiler_Stub.assignSolution(Profiler_Stub.java:533)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sap.engine.services.ejb.session.stateless_sp5.ObjectStubProxyImpl.invoke(ObjectStubProxyImpl.java:187)
at $Proxy73.assignSolution(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sap.engine.services.webservices.runtime.EJBImplementationContainer.invokeMethod(EJBImplementationContainer.java:126)
at com.sap.engine.services.webservices.runtime.RuntimeProcessor.process(RuntimeProcessor.java:146)
at com.sap.engine.services.webservices.runtime.RuntimeProcessor.process(RuntimeProcessor.java:68)
at com.sap.engine.services.webservices.runtime.servlet.ServletDispatcherImpl.doPost(ServletDispatcherImpl.java:92)
at SoapServlet.doPost(SoapServlet.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:385)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:263)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:339)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:317)
at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:810)
at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:238)
at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)
at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:147)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:94)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)
Caused by: com.sap.engine.services.applocking.exception.SAPAppLockingIllegalArgumentException: Inconsistency in number of primary keys
at com.sap.engine.services.applocking.TableLockingImpl.getArgument(TableLockingImpl.java:385)
at com.sap.engine.services.applocking.TableLockingImpl.lock(TableLockingImpl.java:128)
at com.sap.engine.services.applocking.TableLockingImpl.lock(TableLockingImpl.java:138)
at com.sap.engine.services.ejb.entity.pm.lock.TableLockingSystem.write(TableLockingSystem.java:82)
at com.sap.engine.services.ejb.entity.pm.PersistentM2M.create(PersistentM2M.java:172)
at com.sap.engine.services.ejb.entity.pm.PersistentCacheM2M.add(PersistentCacheM2M.java:197)
at com.sap.engine.services.ejb.entity.pm.multiple.CollectionM2M.add(CollectionM2M.java:57)
at com.atosorigin.tcc.testing.ejbses.profiling.ProfilerBean.assignSolution(ProfilerBean.java:201)
at com.atosorigin.tcc.testing.ejbses.profiling.ProfilerObjectImpl0.assignSolution(ProfilerObjectImpl0.java:771)
... 32 more
I can't figure out what the problem is with the ORM mapping defined.
On the database level I have three tables. Consultant maps to PFL_CONSULTANT, Solution to PFL_SAPSOLUTIONS. The third table PFL_CONS_SOL_MAP is the help table used for the relationship (having two fields, which are in fact foreign keys from the other two tables to express the assignment of solutions to consultants (where a consultant can have one or more solutions).
ps. : I am running Netweaver Developer Workplace (Netweaver 2004, at stack level 5)
Message was edited by: Theo PaesenHm, after disabling 'automatic locking' it works.
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