Hello,
I have a problem to use unidirectional OneToMany in case if
foreign key in second table is not nullable.
Sample:
Entities Transaction and Card are related as OneToMany:
@Entity
@Table(name = "TRANS", schema="TEST")
public class
TransactionType {
...
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name="TRANS_ID")
public
java.util.Set<Card> getCards() {
return cards;
}
}
@Entity
@Table(name = "CARD", schema="TEST")
public class
CardUseTypeJAXB {
…
}
The problem is that TRANS_ID column in CARD table is not
nullable.
Eclipse Link generates three SQL statements:
1) INSERT INTO TEST.TRANS (URN, NAME) VALUES (?, ?)
bind
=> [28,
0000001Z]
2) INSERT
INTO TEST.CARD (URN, NUMBER) VALUES (?, ?)
bind
=> [6, 12345]
3) UPDATE
TEST.CARD SET TRANS_ID ? WHERE (URN = ?)
The third statements throws
exception if TRANS_ID column is not nullable: Column
'TRANS_ID' doesn't accept Null value.
(with nullable column all works fine).
Unfortunately I cannot change
the DB schema.
Is there any way to solve
this problem?
Regards,
Andrei.