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Core data, array controller, and add:

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Core data, array controller, and add:

Subject: Core data, array controller, and add:
From: Dale Schack <email@hidden>
Date: Wed, 1 Nov 2006 14:51:49 -0700


Hello,

I have a data model that consists of Parent, which has a to-many relationship with a Child, which has the inverse relationship to Parent.

Each of these objects, Parent and Child, have associated NSArrayControllers. These controllers are used to set up a typical Master-Detail relationship. This displays the model data correctly, and is able to add:/remove: objects to/from the managed object context.

I now want to intercept the point where the newly created Child is added to its Parent, as I need to update a non-standard attribute that maintains ordering. I had thought to perform this in the Parent relationship methods (e.g. addChildObject:)

However, this method is not being called by the default NSArrayController add: method. Do I need to create a custom NSArrayController to ensure that addChildObject: is called on the Parent? Or am I missing something basic here?

Thanks,  Dale

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