On Oct 30, 2010, at 4:46 pm, Paul Johnson wrote: > I have 2 tableviews (A and B) in a window. Both use Core Data. A 3rd > tableview (in a drawer) has a complete list of items that I can selectively > Drag and Drop to tableview B. I have almost implemented the Drag and Drop, > but one step is missing. Tableview B has a Relationship to an item in > tableview A, and I need to set up that pointer in my tableview B array > controller (in tableView:acceptDrop:row:dropOperation:). I haven’t figured > out how to do that yet. Any suggestions? > The basic question -- how do you establish a relationship between two managed objects -- is answered in the documentation: <http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdRelationships.html%23//apple_ref/doc/uid/TP40001857-CJBDBHCB> How you find out the item in Tableview A should be obvious from <http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DragandDrop/UsingDragAndDrop.html%23//apple_ref/doc/uid/20000726-BABFIDAB>.
The Core Data Programming Guide article, however, also notes: "Core Data does not let you create relationships that cross stores. If you need to create a relationship from objects in one store to objects in another, you should consider using fetched properties." Given your earlier statement: On Oct 27, 2010, at 8:38 pm, Paul Johnson wrote: > *The source table and destination table are each supplied data using > separate managed object contexts. (The model for the destination table just > has an additional relationship defined, but the attributes are the same > otherwise.) > If you're using different models for the two table views, presumably you're using two stores...? mmalc _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
