How to synchronize two managedObjectContexts...
How to synchronize two managedObjectContexts...
- Subject: How to synchronize two managedObjectContexts...
- From: "Jon C. Munson II" <email@hidden>
- Date: Wed, 1 Apr 2009 16:29:00 -0400
- Organization: JTA Enterprises LLC
Namaste!
I'm having trouble with an implementation of drag-and-drop for a
core-data-based application.
Scenario: I'm implementing the drag destination for file names coming from
an application (like Finder). The receiving window will take the filenames
and create the appropriate records for the core-data entity that is the
basis of the window.
The drop isn't so much the issue, but rather what to do with it.
If there is a better way to do this, I'd appreciate hearing about it.
After trying:
1. Adding to the array controller for that entity,
2. Adding to the main managedObjectContext,
3. Adding to a distinct managedObjectContext,
And finding that 1 & 2 weren't workable (didn't go too far with #1 as the
add method didn't do what I wanted, and #2 wouldn't create the default data
as stipulated by the class file for the entity and did a great deal of
hangtime), #3 works just fine (no crashes, and default data populates as
expected) EXCEPT I can't seem to get the secondary MOC to notify the primary
MOC of the additions.
I've seen the dox for -mergeChangesFromContextDidSaveNotification (and then
the refreshObject to follow), however, I could not find a complete example
of its implementation (where does that go, etc.).
So, I'm not sure where to go with this - I could use a good example or
better explanation.
Many thanks in advance!
Peace, Love, and Light,
/s/ Jon C. Munson II
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