With hibernate cascading merge from Child to Parent leads to same child row inserted twice and Unique constraint violation
Issue
-
Using following code
FooEty foo = new FooEty(); BarEty bar = new BarEty(); foo.getBars().add(bar); bar.setFoo(foo); bar.setName("mytest"); em.merge(bar);
leads to bar inserted twice, and unique constraint violation.
Environment
- Enterprise Application Platform < 5.0
- Hibernate < 3.3.2
-
Domain Model like
@Entity public class BarEty { @Id @SequenceGenerator(name = "seq", sequenceName = "Sq_Id_Bar") @GeneratedValue(generator = "seq") @Column(name = "Id_Bar") private Long id; @Column(nullable = false, unique = true) private String name; @ManyToOne(cascade = { PERSIST, REFRESH, MERGE }) @JoinColumn(name = "Id_Foo", nullable = false) private FooEty foo; ... @Entity public class FooEty { @Id @SequenceGenerator(name = "seq", sequenceName = "Sq_Id_Foo") @GeneratedValue(generator = "seq") @Column(name = "Id_Foo") private Long id; @OneToMany(cascade = CascadeType.ALL, mappedBy = "foo") private List<BarEty> bars = new ArrayList<BarEty>(); ...
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