hibernate Hibernate Entity Relationships using Annotations Bi-Directional Many to Many using user managed join table object
Example
@Entity
@Table(name="FOO")
public class Foo {
private UUID fooId;
@OneToMany(mappedBy = "bar")
private List<FooBar> bars;
}
@Entity
@Table(name="BAR")
public class Bar {
private UUID barId;
@OneToMany(mappedBy = "foo")
private List<FooBar> foos;
}
@Entity
@Table(name="FOO_BAR")
public class FooBar {
private UUID fooBarId;
@ManyToOne
@JoinColumn(name = "fooId")
private Foo foo;
@ManyToOne
@JoinColumn(name = "barId")
private Bar bar;
//You can store other objects/fields on this table here.
}
Specifies a two-way relationship between many Foo objects to many Bar objects using an intermediate join table that the user manages.
The Foo objects are stored as rows in a table called FOO. The Bar objects are stored as rows in a table called BAR. The relationships between Foo and Bar objects are stored in a table called FOO_BAR. There is a FooBar object as part of the application.
Commonly used when you want to store extra information on the join object such as the date the relationship was created.
