I want to persist my entity with ManyToMany relation. But i have some problem during persisting process. My entities : and Service code : First time, when I try to persist a User with UserRoles “ROLE_USER”, no problem. User and UserRoles and join tables are inserted. My problem is when I try to persist a second User with the same
Tag: many-to-many
Hibernate / JPA many to many relationship through a join table and a composite key, Unique Constraint issue
So I asked this question yesterday, but the goal posts have changed and the question is different: Hibernate / JPA Collection of Elements with Many to Many relationship? I want to know if it’s possible to create entities that will model my required relationship so that Hibernate will create my schema when I fire up my application. The relationship I
In which case do you use the JPA @JoinTable annotation?
In which case do you use the JPA @JoinTable annotation? Answer EDIT 2017-04-29: As pointed to by some of the commenters, the JoinTable example does not need the mappedBy annotation attribute. In fact, recent versions of Hibernate refuse to start up by printing the following error: Let’s pretend that you have an entity named Project and another entity named Task