How to mapping foreign key as just ID (a long) rather than the entity with Hibernate annotations
I would like an entit开发者_运维百科y "A" to map only to the primary key over a foriegn key.
class A {
long id;
long bId;
}
class B {
long bId;
...
}
How do i do this ?
From your post it's not eaxctly clear what you want, so I'm going with what I think it is you want...
@Entity
class A {
@Id
long id;
@OneTo???
B bId;
}
@Entity
class B {
@Id
long bId;
...
}
You will need to specify the relationship between A and B and annotate the link as such. Hibernate will than link the two by generating a FK link to B's indentifier. Your tables will look something like this:
|---------|
| A | |---------|
|---------| | B |
PK|long id | |---------|
FK|long bId | --> PK|long bId |
|---------| |---------|
You could look into annotating bId with One-to-One, or One-to-Many or any of the other mappings, depending on what's applicable in you case.
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