Filed http://code.google.com/p/datanucleus-appengine/issues/detail?id=188
On Tue, Jan 12, 2010 at 11:01 AM, Max Ross (Google) <
maxr+appeng...@google.com <maxr%2bappeng...@google.com>> wrote:
> Hi Kemal, thanks for the report. I can reproduce the exception and I can
> make the exception go away by removing the column = "F_PK" attributes from
> the @Persistent annotations. I don't yet know why this is causing a problem
> but overriding the name of a primary key column doesn't do anything (the
> primary key is always mapped to the Entity key, not a named property on the
> Entity), so removing them shouldn't hurt.
>
> Max
>
> On Thu, Jan 7, 2010 at 10:20 AM, Kemal Dogan <kemal.m...@gmail.com> wrote:
>
>> is there any solution for this problem?
>>
>> On Thu, Dec 31, 2009 at 8:46 PM, Kemal Dogan <kemal.m...@gmail.com>
>> wrote:
>> > hi,
>> > I have two entity with owned relation. Order is master entity and
>> > OrderItem is child entity.
>> > When I have to persist Order without OrderItem, but
>> > it gives an exception (javax.jdo.JDOException: Unexpected error during
>> > precommit) at commit line.
>> >
>> > But if I add an OrderItem instance to orderItemChilds, then it works.
>> >
>> > My sample code is at below, how can I solve this problem.
>> > Please help.
>> >
>> > Kemal Dogan.
>> >
>> >
>> > -----------------------------------------------
>> > My Codes:
>> >
>> > Master Entity:
>> > @PersistenceCapable(identityType = IdentityType.APPLICATION, table =
>> > "T_Order", detachable = "true")
>> > @Inheritance(customStrategy = "complete-table")
>> > public class Order extends MasterEntityImpl {
>> >
>> > @Persistent(mappedBy = "order")
>> > @Element(dependent = "true")
>> > @javax.jdo.annotations.Order(extensions = @Extension(vendorName =
>> > "datanucleus", key = "list-ordering", value = "pk asc"))
>> > private List<OrderItem> orderItemChilds = new ArrayList();
>> > ...
>> > Child Entity:
>> > @PersistenceCapable(identityType = IdentityType.APPLICATION, table =
>> > "T_OrderItem", detachable = "true")
>> > public class OrderItem extends ChildEntityImpl<Order> {
>> > @Persistent
>> > private Order order;
>> > ...
>> > DAO code:
>> > public void test_With_ERROR() {
>> > OrderDAO orderDAO = DAOFactory.getInstance().getOrderDAO();
>> > Order order= new Order();
>> > orderDAO.persist(order);
>> > }
>> > public void test_With_NO_ERROR() {
>> > OrderDAO orderDAO = DAOFactory.getInstance().getOrderDAO();
>> > Order order= new Order();
>> > List<OrderItem> orderItems= (List<OrderItem>)
>> > order.getOrderItemChilds();
>> > OrderItem item= new OrderItem();
>> > orderItems.add(item);
>> > orderDAO.persist(order);
>> > }
>> > .....
>> >
>> > Other abtract classes.
>> > @PersistenceCapable(identityType = IdentityType.APPLICATION,
>> > detachable = "true")
>> > @Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
>> > public abstract class MasterEntityImpl implements MasterEntity<Key> {
>> > @PrimaryKey
>> > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY, column =
>> "F_PK")
>> > private Key pk;
>> > ...
>> > @PersistenceCapable(identityType = IdentityType.APPLICATION,
>> > detachable = "true")
>> > @Inheritance(strategy = InheritanceStrategy.SUBCLASS_TABLE)
>> > public abstract class ChildEntityImpl<T extends MasterEntity>
>> > implements ChildEntity<T,Key> {
>> > @PrimaryKey
>> > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY, column =
>> "F_PK")
>> > private Key pk;
>> > ...
>> >
>>
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>>
>
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