TOPLINK-6094: Mapping OntToMany (JPA)

Question

Hello!
I'm learning how to use Java Persistence API and I'm getting an error which i don't know more what to do to solve it... :(
Exception Description: The parameter name [cdUsuar] in the query's selection criteria does not match any parameter name defined in the query.
Query: ReadAllQuery(sysgroups.entity.Profissao)
at oracle.toplink.essentials.exceptions.QueryException.parameterNameMismatch(QueryException.java:966)
at oracle.toplink.essentials.internal.expressions.ParameterExpression.getValue(ParameterExpression.java:206)
So, I'm mapping the tables User (USUARIO) and Jobs(PROFISSAO) in my entities like that:
Entities:
@javax.persistence.Entity
@javax.persistence.Table(name = "USUARIO")
@javax.persistence.NamedQueries( {
@javax.persistence.NamedQuery( name = "Usuario.findByCdUsuar",
query = "SELECT u FROM Usuario u WHERE u.cdUsuar = :cdUsuar"),
@javax.persistence.NamedQuery( name = "Usuario.findByLogin",
query = "SELECT u FROM Usuario u WHERE u.dsLogin = :dsLogin and u.dsSenha = :dsSenha"),
@javax.persistence.NamedQuery( name = "Usuario.findByNmUsuar",
query = "SELECT u FROM Usuario u WHERE u.nmUsuar = :nmUsuar"),
@javax.persistence.NamedQuery( name = "Usuario.findByDsLogin",
query = "SELECT u FROM Usuario u WHERE u.dsLogin = :dsLogin"),
@javax.persistence.NamedQuery( name = "Usuario.findByDsSenha",
query = "SELECT u FROM Usuario u WHERE u.dsSenha = :dsSenha")
public class Usuario implements Serializable {
@javax.persistence.Id
@javax.persistence.Column(name = "CD_USUAR", nullable = false)
@GeneratedValue(strategy=javax.persistence.GenerationType.SEQUENCE, generator="SqUsuario")
@SequenceGenerator(name="SqUsuario",sequenceName="SQ_USUARIO", allocationSize=20)
private BigDecimal cdUsuar;
@javax.persistence.Column(name = "NM_USUAR", nullable = false)
private String nmUsuar;
@OneToMany
@JoinTable(
name="USUARIO_PROFISSAO",
joinColumns=@JoinColumn(name="CD_USUAR", referencedColumnName="cdUsuar"),
inverseJoinColumns=@JoinColumn(name="CD_PROFI", referencedColumnName="cdProfi")
private java.util.List <sysgroups.entity.Profissao> profissoes;
// gets and sets...
@javax.persistence.Entity
@javax.persistence.Table(name = "PROFISSAO")
@javax.persistence.NamedQueries( {
@javax.persistence.NamedQuery(name = "Profissao.findByCdProfi", query = "SELECT p FROM Profissao p WHERE p.cdProfi = :cdProfi"),
@javax.persistence.NamedQuery(name = "Profissao.findAll", query = "SELECT OBJECT(p) FROM Profissao p"),
@javax.persistence.NamedQuery(name = "Profissao.findByDsProfi", query = "SELECT p FROM Profissao p WHERE p.dsProfi = :dsProfi")
public class Profissao implements Serializable {
@javax.persistence.Id
@javax.persistence.Column(name = "CD_PROFI", nullable = false)
private BigDecimal cdProfi;
@javax.persistence.Column(name = "DS_PROFI")
private String dsProfi;
// gets and sets
The tables are like that:
USUARIO
cd_usuar (PK)
nm_usuar
PROFISSAO
cd_profi (PK)
ds_profi
USUARIO_PROFISSAO
cd_usuar
cd_profi
And the error appears, for example, when i try to do something like that:
Usuario usuario = (Usuario)manager.createNamedQuery("Usuario.findByLogin").
setParameter("dsLogin",login.getLogin()).
setParameter("dsSenha",login.getSenha()).
getSingleResult();
if (usuario.getProfissoes() != null) { // OK
// Test
System.out.println("Nr Profissoes = "+ usuario.getProfissoes().size());
// ERROR...
enviroment:
netbeans 5.5 beta 2 Build: 200607190830, Ent. Pack 20060810
Sun Java System App Server 9
jdk1.5.0_05
Guys,
Sorry my poor english, but I hope u can get the idea.
Thanks a lot!

Answer 1

Hello,
The original posting seems to have defined the relationship mappings joinColumns incorrectly. For instance, in the case of :
joinColumns=@JoinColumn(name="CD_USUAR", referencedColumnName="cdUsuar"),
The referencedColumnName should refer to the Database table's Column name, not the object's property name. So USUARIO_PROFISSAO's CD_USUAR column should reference USUARIO's CD_USUAR column, not "cdUsuar" which doesn't exist.
Check to see your mappings are set up correctly as well.
Best Regards,
Chris