how to make a composite primary key (java persistence annotation)

Question

How to make it so that the table user_roles defines the two columns (userID, roleID) as a composite primary key. should be easy, just can\'t remember/find.

In

Answer 1

Thank you for improving your question ... and taking into account the suggestions.

(Sorry, It is a bit strange that you postfix your entities with Daos, but it is not the point.)

I'm not sure there is any problem left :

• The two entities you describe each have one PK, not a pair-of.
• The link-table has no corresponding entity, it is defined implicitely by the two entities and their ManyToMany relationship. If you need a third Entity, change your ManyToMany for a pair of OneToMany and ManyToOne relationships.