[CAY-872] Potential bug deleting uncommited objects from a nested DataContext

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.0
• Fix Version/s: 3.0M2
• Component/s: Core Library
• Environment: OS X, Java 1.5
• Assignee: Andrus Adamchik
• Reporter: Michael Gentry
• Created: 04/Oct/07 18:20
• Updated: 09/Nov/08 01:07
• Resolved: 05/Oct/07 10:21

Description

Quoting from e-mail list:

DataContext childContext = parentContext.createChildDataContext();

I have a Master and 3 Details (1-to-many) in the parent DC (in a
committed state), and pull the Master into the nested DC using
localObject(). If I then do the following:

Master childMaster = (Master)
childContext.localObject(parentMaster.getObjectId(), null);

Detail d = (Detail) childContext.newObject(Detail.class);
d.setXXXXXXXX(...); // do sets
childMaster.addToDetails(d);

childContext.commitChangesToParent();

childContext.deleteObject(d);
childMaster.removeFromDetails(d);
childContext.commitChangesToParent();

I get an exception on the last commitChangesToParent():

Exception in thread "main" org.apache.cayenne.CayenneRuntimeException:
[v.3.0M1 Jul 16 2007 22:25:33] Can't build a query for temporary id:
<ObjectId:Detail, TEMP:000004B078EB2838>

Is this to be expected? If I change commitChangesToParent() to
commitChanges() it works ...

See attached project for full code and test harness. To run, you'll need to adjust the DB connection information and generate the schema.