On May 6, 2009, at 3:44 PM, David Scheidt wrote:
I've got a Core Data app, using the NSPersistantDocument stuff. There are three basic entity types. There is one, which I'll call MainEntity, which has optional to-many relationships with the other two, which I'll call A and B. In my main window, I have a TableView, which has its columns bound to subclass of NSArrayController (I'm overriding setFilterPredicate, and have some convience methods). In the bottom part of the window, there is an area that shows details of the particular MainEntity that's selected in the table. there is another table column which shows either the AEntities or BEntities that the selected MainEntity has (using an ArrayController bound to MainEntityArrayController.selection. When I have everything in one nib, and use a TabView to control which of the A or B tables is shown, everything works just fine. For various reasons, I want to replace the bottom section of the window with a set of ViewControllers. I'm at a loss trying to figure out how properly get a reference to the MainEntityArrayController. I've put an instance of the ArrayController in my AView.xib, and set the viewControllers mainEntityArrayController outlet in windowControllerDidLoadNib. It gets the right value there, but the change in selection doesn't seem to propagate into the other view. what am I missing?_______________________________________________
For the benefit of the archives: I'm binding to file's owner. (Which, in this case is a ViewController.) It has a reference to the document that the window is associated with, which knows about the array controller. So I use a keypath of self.theDocument.theArrayController.selection.key to get values. I have array controllers in the sub-nibs bound to self .theDocument .theArrayController.selection.relationshipThatPointsAtMySubEntities. Other than being a big pain to type that, this seems to work fine. (I'm getting an error [<_NSFaultingMutableSet 0x10828b0> addObserver:forKeyPath:options:context:] is not supported. Key path: @avg.myRating for one of the key paths, but that may be me.)
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