Home/ Questions/Q 9144313
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-17T10:14:20+00:00

I am new to Java EE (and to Netbeans). I have am trying to

  • 0

I am new to Java EE (and to Netbeans). I have am trying to automatically generate entity classes from my mysql database… For simple relationships it works, but for the following it always fails:

enter image description here

i get the following error:

Internal Exception: Exception [EclipseLink-7220] (Eclipse Persistence Services – 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.ValidationException
Exception Description: The @JoinColumns on the annotated element [field tblExpandituresTranx] from the entity class [class entities.restaurant.TblContents] is incomplete. When the source entity class uses a composite primary key, a @JoinColumn must be specified for each join column using the @JoinColumns. Both the name and the referencedColumnName elements must be specified in each such @JoinColumn.. Please see server.log for more details.

I think… I have some error in my database or perhaps EclipseLink JPA tool is kaput!
please help!

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I solved the problem myself…
    Apparently JPA has a problem with multiple primary keys in bridge tables. So, instead of having foreign keys as primaries I just converted them to unique indexed and everything worked just fine!! wuhu!!

    • 0