Re: Problem with nested editing contexts
Re: Problem with nested editing contexts
- Subject: Re: Problem with nested editing contexts
- From: Chuck Hill <email@hidden>
- Date: Sat, 24 Mar 2007 15:00:08 -0700
Are you locking the child EC?
On Mar 24, 2007, at 2:30 PM, Steven Mark McCraw wrote:
Hi all,
I have recently bumped into a problem with using nested editing
contexts to accomplish add/edit workflows. What I'm doing seems
simple enough, and correct from my understanding of the
documentation. I'm creating a nested editing context:
EOEditingContext nestedEC = new EOEditingContext
(session.defaultEditingContext);
and then creating my EOs in this. When it's time to save, I do the
following:
nestedEC.saveChanges();
session.defaultEditingContext().saveChanges();
This seems to work fine with newly created items. The problem
comes when I try to do that on an item that has been modified. I
have printed out a few things within the code to confirm this:
when the nested editing context saves its changes, it's supposed to
push them into its parent context (or so I thought), but this is
definitely not happening. Is this a well known issue? Has anyone
seen this before? Am I missing something? A couple of hours of
googling turned up nothing for me. The code and its output is
shown below.
Thanks in advance for any help.
NSLog.out.appendln("nestedEC updatedObjects: " +
nestedEC.updatedObjects());
NSLog.out.appendln("nestedEC.parent: " +
nestedEC.parentObjectStore());
NSLog.out.appendln("session.defaultEditingContext: " +
session.defaultEditingContext());
nestedEC.saveChanges();
NSLog.out.appendln("session.defaultEditingContext updatedObjects:
" + session.defaultEditingContext().updatedObjects());
session.defaultEditingContext().saveChanges();
The output is:
nestedEC updatedObjects: (Test, 380.00, null)
nestedEC.parent: er.extensions.ERXEC@ad81d2
session.defaultEditingContext: er.extensions.ERXEC@ad81d2
session.defaultEditingContext updatedObjects: ()
The first line shows that there is an updated object in the nested EC
The second and third lines show that the ec is actually nested
within another
editing context and that the nested ec's parent is the session's
default editingContext
The fourth line shows that after calling saveChanges() in the
nested ec, the parent ec still is showing no objects to update
Consequently, if I check the database after calling the final
saveChanges, my change is not there.
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