Imagine an Employee Entity that references a Department using a Compound Key:
Code:
@Entity
public class Employee {
...
@ManyToOne
@JoinColumns({
@JoinColumn(name="dept_country", referencedColumnName="country"),
@JoinColumn(name="dept_id", referencedColumnName="id")
})
private Department dept;
...
In a Stateless Session Bean, I associate an Employee with a Department, by setting the appropriate attribute:
Code:
employee.setAbc(abc);
System.out.println(entityManager.contains(aDepartment))); //true
employee.setDepartment(aDepartment);
employee.setXyz(xyz);
entityManager.merge(employee);
=> All attributes are correctly persisted (updated) into the database,
except the Department is not associated with the Employee.
I wonder if this is related to the compound key, because when I look at the Hibernate SQL in the background, exactly those foreign key columns are missing.
Code:
14:46:18 INFO [STDOUT#write] Hibernate:
14:46:18 INFO [STDOUT#write] update
14:46:18 INFO [STDOUT#write] employees
14:46:18 INFO [STDOUT#write] set
14:46:18 INFO [STDOUT#write] abc=?,
14:46:18 INFO [STDOUT#write] xyz=?,
14:46:18 INFO [STDOUT#write] where
14:46:18 INFO [STDOUT#write] id=?
I hope I missed something trivial...
PS: I asked the same question on
StackOverflow.
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