JPA @OneToMany : foreign key is null

Question

I need help to define correctly a @OneToMany JPA annotation. Tried different ways but still get error/issues like the foreign key (visitor_revision_id) is null in the visit

Answer 1

Without a test case showing the failure its difficult to tell.

Here are some things you can try:

1. add , nullable = false to the join column annotation on VisitorCharacteristic

2. set the relationship in both directions Visitor v = new Visitor(); VisitorCharacteristic vc = new VisitorCharacteristic(); v.setVisitorCharacteristicList(Arrays.asList(vc)); vc.setVisitor(v);