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.