Peter hello, first of all thanks for the reply. So yes, I need to cross a to-many relationship. let me see if I got this straight because my mind was heading in that same direction you commented, just I didn't know what to use or what was the name of the artifact, in this case the NSComparasionPredicateModifier.
So due the fact that I already have overwritten NSPredicateEditorRowTemplate to enlarge the Floating-Decimal NSTextfield of the right expression, I would take that approach first, overwriden the predicateWithSubpredicates method and doing the following: - (NSPredicate *)predicateWithSubpredicates:(NSArray *)subpredicates{ NSPredicate * predicate = [NSComparasionPredicate predicateWithLeftExpression:(NSExpression *)lhs rightExpression:(NSExpression*)rhs modifier: NSAllPredicateModifier type:(NSPredicateOperatorType)type options:NSCaseInsensitivePredicateOption]; } I don't know what lhs, rhs and type must be. should I pass [[self leftExpresions] objectAtIndex:0] and also for the rightExpresion? or does it comes from the subpredicates parameter?. sorry I got little confused there... :( Thx Gustavo On Aug 13, 2010, at 11:49 PM, Peter Ammon wrote: > > On Aug 13, 2010, at 8:45 AM, Gustavo Pizano wrote: > >> Hello all once again. >> >> I have been searching but I hadn't found something useful, so please before >> if you know a place I can look at let me know. >> >> I have these 3 Entities >> >> ExpenditureGroup: >> name >> icon. >> ----------------------- >> toExpenditures. ->> >> >> >> Expenditure >> creationDate >> location >> total >> -------------------- >> toExpenditureGroup -> >> toExpenditureDetails ->> >> >> >> ExpenditureDetail >> detailDescrb >> subTotal >> ---------------------- >> toExpenditure -> >> >> also I have an arrayController that fetches all the ExpenditureGroup >> Entities called _expenditureGorupArrayController. >> >> in my predicate editor I added the NSPredicateEditorRowTemplates with key >> paths for toExpenditures.location, toExpenditures.creationDate, >> toExpenditures.total, toExpenditures.toExpenditrueDetails.detailDescrb and >> finally toExpenditures.toExpenditureDetails.subTotal. >> >> I dunno if those last 2 are ok.. my guess NO. >> >> anyway, when I set the predicate, Im setting into the >> _expenditureGroupArrayController setFilterPredicate, and pass the predicate >> I just created, but nothing seems to work. > > Hi Gustavo, > > It looks like you want your predicate to cross a "to-many" relation. Is that > right? If so, you need to create a predicate that has an > NSComparisonPredicateModifier that knows how to cross to-many relations (that > is, either NSAllPredicateModifier or NSAnyPredicateModifier). > > If you're using NSPredicateEditor to create the predicate, then the > RowTemplate has to know to create a predicate with the right modifier. > Unfortunately you cannot yet set that up in IB, but you can do it > programmatically, by passing the right NSComparisonPredicateModifier to one > of the initWith... methods on NSPredicateEditorRowTemplate (see its header). > > You can also subclass NSPredicateEditorRowTemplate and override > -predicateWithSubpredicates: to create an NSPredicate with the proper > modifier. > > Hope that helps, let me know if that's not clear, > -Peter > _______________________________________________ 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