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Cannot Perform Operation Without A Managed Object Context

Yes, my password is: Forgot your password? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Is it possible to use this stuff in a prefs pane? asked 5 years ago viewed 2857 times active 1 year ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Related 1What do you need to implement to provide a Content weblink

r/champourlier's public tech way R/C's tech blog: development, technical tips'n'tricks, mostly on iPhone SDK Home About me Home > Cocoa, CoreData > More on the "Cannot perform operation without a managed I have an NSArrayController in xib file which is bound to Entity and NSManagedObjectContext in IB: // Bind To Delegate self.mainContext It seems Array controller is accessing mainContext before it is I think I get > what that's telling me, but how do I set one up? > > In the tutorial, it seemed to "just work," and I didn't set anything The only difference I can spot is in yesterday's project, the File's Owner is an NSDocument.

Also, if you want to refactor to a singleton CoreDataManager class, you can just change where to redirect to. I asked this over in the Apple Dev Forums as well and got an answer that nearly works: bind the MOC of the array controller to the view controller running it share Share on Twitter Share on Facebook Email Link Like + Quote Reply (You must log in or sign up to post here.) Show Ignored Content Share This Page Log in Advertise on MacRumors Our Staff Arnold Kim Editorial Director Email • Twitter Eric Slivka Editor in Chief Email • Twitter Juli Clover Editor Email • Twitter Joe Rossignol Editor Email •

gawk inplace and stdout Where do I drop off a foot passenger in Calais (P&O)? I have a few much more meager posts that are fairly old these days but still have useful info in them at www.theMikeSwan.com/blog/. How can a Cleric be proficient in warhammers? I am not creating any additional view Controller objects. –Khundragpan May 3 at 7:07 Did you copy or recreate the XIB? –Willeke May 3 at 13:52 @Willeke,

What are the applications of taking the output of an amp with a microphone? Select your project and data model, and fool around with the options after that. What am I missing? > > Thanks! > > -- > Rick -- Rick Keary Suska Re: Core Data & IB in prefs pane ("Cannot perform operation without a managed object http://stackoverflow.com/questions/36997265/using-arraycontroller-results-in-cannot-perform-operation-without-a-managed-obj Stay logged in Please select a forum to jump to News and Article Discussion MacRumors.com News Discussion Mac Blog Discussion

Perhaps I don't even need to implement this, just something that creates a managedObjectContext? What is the temperature of the brakes after a typical landing? Not the answer you're looking for? Not the answer you're looking for?

It works fine as long as the tables/arraycontrollers are on the same tab, but when on separate tabs it is no joy. http://stackoverflow.com/questions/11059896/how-to-bind-nsarraycontroller-to-nsmanagedobjectcontext-when-using-magicalrecord I get "3/28/08 1:17:58 PM System Preferences[7428] Cannot > perform operation without a managed object context". My program, upon execution, logs the following pretty early on in the process: NSRunLoop ignoring exception 'Cannot perform operation without a managed object context' that raised during posting of delayed perform share|improve this answer answered Aug 3 '12 at 6:18 casademora 23.5k125475 Sorry it took so long to get back to you on this, its actually what i did in

The debugger doesn't really give me an understandable information on the matter, the stack doesn't contain any methods I would call. have a peek at these guys What am I missing? Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Today, it's a PrefsPane. > > Is it possible to use this stuff in a prefs pane?

Don't know for sure. > In the tutorial, it seemed to "just work," and I didn't set anything > up explicitly. Can anyone please help? is this a problem? check over here Best way to remove old paint from door hinges 40 Vertices And A Connected Graph, Minimum Number Of Edges?

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Browse other questions tagged swift cocoa core-data nsarraycontroller or ask your own question. In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms up vote 9 down vote favorite 7 Before Xcode went and added Storyboards for OS X apps you could connect an array controller to your document's managed object context by binding Thanks @Eraserhead!

Also is the program document based or not?Click to expand... Join them; it only takes a minute: Sign up What is the new way of binding an NSArrayController to the managed object context of a Core Data document? This simply creates a member which redirects to where your actual MOC is stored. http://ecoflashapps.com/cannot-perform/cannot-perform-this-operation-while-sqlserveragent.html Probably better to just have a MOC property somewhere you can access in either the VC hierarchy or app delegate share|improve this answer answered Jan 28 '15 at 5:41 stevesliva 2,5301729

AppDelegate return delegater.managedObjectContext }() share|improve this answer answered Oct 21 '15 at 15:23 leerie simpson 112 add a comment| Your Answer draft saved draft discarded Sign up or log in Also is the program document based or not? current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. share Share on Twitter Share on Facebook Email Link Like + Quote Reply kselbee, Jun 21, 2008 kselbee thread starter macrumors newbie Joined: Apr 1, 2008 #3 Eraserhead said: ↑ Go

How to make my logo color look the same in Web & Print? Is there something NSDocument does to support Core Data that an NSPrefsPane wouldn't do by default? As far as I know filteredArrayUsingPredicate won't return nil, if there are no matches, it returns an empty array. –Paulw11 Sep 22 '15 at 21:18 add a comment| active oldest votes If so, how can I track it down?

Are there continuous functions for which the epsilon-delta property doesn't hold? Related 4New Core Data object doesn't show up in NSArrayController arrangedObjects7What do you bind NSArrayController's Managed Object Context to in Xcode 4?1Cocoa Cannot perform operation without a managed object context2How to I'm trying > to use it in a Prefs Pane. EDIT: I am using regular xib file.

Why won't curl download this link when a browser will? var mainContext:NSManagedObjectContext! With storyboards there is no more File's Owner so where do you get the context from now? share|improve this answer answered Aug 9 '11 at 20:34 TechZen 59.1k13100136 Thanks for the reply but my Nib does know about the managedObjectContext (so I think!).

Can dispel magic end a darkness spell? Following the track of correctly managing CoreData-document loading How to determine when CoreData's data isloaded? The issue I believe is that when I set the view controllers managedObjectContext property to that of the [[NSApp delegate] managedObjectContext] in awakeFromNib it doesn't perform the binding even thought the