On 2010-03-05, at 11:21 AM, Quincey Morris wrote: > The difficulty is that (of course) all the rows in a table view are the same. > Therefore the table view must see a consistent data model that isn't your > actual data model. >
I know and I'm trying to think of UI alternatives that wouldn't smell as badly as this one does. > One way of doing this would be to define all of the properties that the table > view needs in the Player parent entity, and to override the appropriate ones > in the Skaters and Goalies entities to return the correct value. > Yeah, that's the easiest but I grimace when I think of that. > Another way of doing this is to define a set of (non-Core Data) intermediary > objects that have the desired "display" properties, and keep these in sync > with the actual data model via KVO. > I thought of that too. :) > It's hard to be more specific without knowing how you intend to represent > different properties that are row-wise different in a table where all the > rows have the same structure. What do you show for a Skater-only property in > a Goalie row? > Just empty fields, i.e "" > IMO, using an array controller like this is a terrible idea. Array > controllers are mostly view-supporting objects, and integrating them into > your data model code is a bit messy. Just go straight to your data model > properties. If you need sorting and filtering, use Core Data's capabilities > directly. I can't immediately think of any other reason why it might seem to > be a good idea to use an array controller here. > I didn't mean to imply that I'm integrating an array controller into the data model. I'm not doing that at all. The reason for creating a TableSource backed by the Array controller is to get the "off-the-shelf" capabilities that NSArrayController gives you in IB. > Couldn't make that work in what sense? What went wrong? I didn't try very hard - just an hour or two this morning, but I couldn't get my tableView:objectValueForTableColumn:row: method to be called. The numberOfRowsInTableView: got called so I think I had hooked it up right. But as I said, I didn't try very hard. In any case, thanks for the thoughts. I'll ruminate on them for a bit. My thoughts right now lead me to fix the UI so that I don't have to "jury-rig" a table view. Thanks, Jean _______________________________________________ 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
