Mapping exception in hibernate with CollectionOfElements

Question

I am trying to get this mapping to work, but I get this strange exception message

Could not determine type for: foo.ProcessUser, at table: ProcessUser_onetimeCodes, for columns: [org.hibernate.mapping.Column(processUser)]

@Entity
public class ProcessUser {

  @Setter
  private List<OnetimeCodes> onetimeCodes;

  @CollectionOfElements
public List<OnetimeCodes> getOnetimeCodes() {
    return onetimeCodes;
  }
}


@Embeddable
@Data
public class OnetimeCodes {

    @Parent
    private ProcessUser processUser;

    @Column(nullable=false)
    @NotEmpty
    private String password;


    public OnetimeCodes(ProcessUser processUser, String password) {
        this.processUser = processUser;
        this.password = password;
    }
}

Can anyone spot whats wrong here? I have hibernate.hbm2ddl.auto on create

score 2 · Accepted Answer · answered Nov 12 '10 at 16:02

I found the error.

You cannot have mapping on the attribute in one of the classes, and on getters on the other. They should match.

So I changed

@Embeddable
@Data
public class OnetimeCodes {

    @Parent
    private ProcessUser processUser;

    @Column(nullable=false)
    @NotEmpty
    private String password;


    public OnetimeCodes(ProcessUser processUser, String password) {
        this.processUser = processUser;
        this.password = password;
    }
}

to

@Embeddable
public class OnetimeCodes {

    private ProcessUser processUser;

    private String password;

    public OnetimeCodes(ProcessUser processUser, String password) {
        this.processUser = processUser;
        this.password = password;
    }

    @Parent
    public ProcessUser getProcessUser() {
        return processUser;
    }

    public void setProcessUser(ProcessUser processUser) {
        this.processUser = processUser;
    }

    @Column(nullable=false)
    @NotEmpty
    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

and viola. Very stupid if you ask me.

The framework is stupid. I had the very same problem. My setup was so complicated (composite foreign key with many-to-one relation) that I never thought it was that. Not only the code of the framework is bad, but so is the documentation because it never tells you to put `@EmbeddedId` on a getter. — tiktak, Jan 18 '15 at 00:29

Mapping exception in hibernate with CollectionOfElements

1 Answers1