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Cannot Perform Operation Without A Managed Object

Any thoughts of what might be causing this? I think it's more straightforward for either the app delegate or one controller or another to create the MOC, and bind through the controller(s). –stevesliva Jan 28 '15 at 18:49 In any of those events, you would not need to update the bindings in IB. –stevesliva Jan 29 '15 at 3:00 I've tried adding a managedObjectContext object to the Hint :configure your browser Monospace font in the Preferences. weblink

I get "3/28/08 1:17:58 PM System Preferences[7428] Cannot > perform operation without a managed object context". Any > thoughts of what might be causing this? They will be ignored. > Cocoa-dev mailing list () > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/skiadas% > 40math.uchicago.edu > > This email sent to > Haris Cocoa - July I am lost, any suggestions on how to do a one to many relationship across tabs on a multi-tab view controller setup like this?

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Join them; it only takes a minute: Sign up Cannot perform operation without a managed object context up vote 0 down vote favorite I'm trying add items from core data query I can fetch data by executing request on the same context though. –Khundragpan May 3 at 14:01 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote How to make figure bigger in subfigures when width? Why is Professor Lewin correct regarding dimensional analysis, and I'm not?

I still see one complaint for each tab that gets loaded but it works after that. The > debugger doesn't really give me an understandable information on > the matter, the stack doesn't contain any methods I would call. Is there a word for turning something into a competition? http://stackoverflow.com/questions/32725018/cannot-perform-operation-without-a-managed-object-context asked 6 months ago viewed 83 times active 6 months ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Related 0Elegantly add object to arraycontroller, which itself is linked to

This doesn't seem like it is coming from any of my methods, of which there are almost none anyway. 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 What crime would be illegal to uncover in medieval Europe? Alternately you might be able to add an entity to your model that just tracks the selected item then use that to control what is shown in the second tab. –theMikeSwan

more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Join them; it only takes a minute: Sign up How to bind NSArrayController to NSManagedObjectContext when using MagicalRecord up vote 1 down vote favorite 1 Ive recently started migrating a project Well, you did actually, but it may not have been entirely obvious, and you may not have completely understood each step you took. Simply googling it gave me the following link: Cocoabuilder - (Charilaos Skiadas) Cannot perform operation… As a matter of fact, it answered my remaining problem.

This doesn't seem like it is coming from any of my methods, of which there are almost none anyway. http://ecoflashapps.com/cannot-perform/cannot-perform-this-operation-while-sqlserveragent.html Email check failed, please try again Sorry, your blog cannot share posts by email. %d bloggers like this: cocoa xcode cocoa xcode Cannot perform operation without a managed object context Charilaos Not the answer you're looking for? Having an NSManagedObjectContext variable doesn't mean the context exists. –Tom Harrington Sep 22 '15 at 19:27 is not nil, po moc –user2924482 Sep 22 '15 at 19:31

Following the track of correctly managing CoreData-document loading How to determine when CoreData's data isloaded? I think I get > what that's telling me, but how do I set one up? more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation check over here In the awakeFromNib method I have tried setting the managedObjectContext (MOC) property to: managedObjectContext = [(MyApplicationAppDelegate *)[[NSApplication sharedApplication] delegate] managedObjectContext]; managedObjectContext = [[NSApp delegate] managedObjectContext]; I have also configured the NSArrayControllers

Why did Michael Corleone not forgive his brother Fredo? What physical evidence exists that shows motor proteins "walking" within a cell? So I tried using the Core Data Entity tool to let IB do it, and it disables the Add and Remove buttons.

The commands listed in the table in the second tab are not affected by any selection in the first table.

Thanks! ---------------------------- Original message: I'm trying to use what I learned yesterday about Core Data in a System Prefs pane. You can answer yourself if you want. I'd like to replicate that support in my prefs pane class. share|improve this answer answered May 3 at 14:11 Willeke 2,6782310 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up

Your various controllers can then listen for those notifications and update accordingly. –The Cappy Jan 25 at 1:45 add a comment| Your Answer draft saved draft discarded Sign up or 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 Expanding FULLY a macro as argument What does an expansion in early december mean for the standard format? this content Any thoughts of what might be causing this?

In order to have a selection in one tab affect what is shown in another tab you will need to add something, likely in whatever shared super view or window controller ios objective-c core-data nspredicate share|improve this question asked Sep 22 '15 at 19:12 user2924482 82311332 Well, do you have a managed object context? –Tom Harrington Sep 22 '15 at more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation I've written no code, just set things up with the data model editor and IB.

I'm > trying to use it in a Prefs Pane. newsgator Bloglines iNezha Tweet! Hot Network Questions What is with the speech audience? There is a one to many relationship between the Profiles and the Commands entities with the names profiles <->> commands.

If an image is rotated losslessly, why does the file size change? Both tab's work as expected with no errors independently - meaning I can add and delete Profiles->name in the table in the first tab, and I can add and delete Commands->name Any help would be greatly appreciated. This was sort of an extended comment.

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Why is looping over find's output bad practice? Let me know how it turns out. cocoa core-data nsarraycontroller magicalrecord share|improve this question asked Jun 16 '12 at 0:56 aarcarr 9919 Have you properly set up the MagicalRecord in the app delegate? –Fabiano Francesconi Jun