Rename xcdatamodel file

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Solution 1

I have been having the same problem with Xcode 4. Don't know what the behaviour is in Xcode 3.

Firstly, when you add a core data model in xcode, you actually get a .xcdatamodeld file which is a package like the .xcodeproj file. In finder, you can right click it and "Show Package Contents". You'll see it contains a .xcdatamodel file.

It seems to me you can't rename it fully using xcode. Xcode will change the name of the package file (the momd) as you see it in the UI, but on the file system it has not actually changed.

The nil model error you get is because it can't find the newfilename momd since it still has the old name on disk. (I guess)

I worked around this by creating a new model with the name I wanted, then in the existing model, you can click-drag and select your entities, then just paste them into the new model file. You can then delete the old one and commit all the changes to your SCM.

Solution 2

There is a hidden file called .xccurrentversion which should be in the same location as your whatever.xcdatamodeld file. Inside there is a reference to your model which needs to be updated with the new name.

In some cases, you'll have to remove the .xcdatamodeld file from the project and add it again to make it work.

Solution 3

Thanks to all of you for helping me finally nail this one down. Here's how I fixed this after renaming my project in Xcode 4.2:

1) Delete the reference to the *.xcdatamodeld file in your project. If it's like mine, an editor won't load when you select it. This tells me a link was broken in the rename.

2) Right-click on the .xcdoeproj file for your project and select 'Show Package Contents'.

3) Drag the *.xcdatamodeld file you find there back into your project. Done.

My app buil

Solution 4

In XCode 4.3.2, it successfully renames the model file but I had to remove it from the project and add it again to make it work. Otherwise it was throwing

Solution 5

Looks like momd missing in resources files. You can check in generated .app.

Make sure it is in compile sources build phase.

And clean/rebuild sometimes helps with xcdatamodels... Especially when creating/renaming them...

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Mustafa
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Mustafa

I'm a Manager Development/Project Manager/Team Lead/Mobile Application Developer located in Islamabad, Pakistan, working for BroadPeak Technologies. I'm currently focusing on managing and developing mobile applications for Android and iOS devices; with hands on experience developing iOS applications. More information.

Updated on March 17, 2020

Comments

  • Mustafa
    Mustafa over 3 years

    What do in need to do to rename the .xcdatamodel file. Renaming .xcdatamodel filename, along with changing ...

    NSURL *modelURL = [[NSBundle mainBundle] URLForResource:@"newfilename" withExtension:@"momd"];
    __managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];    
    return __managedObjectModel;
    

    and

    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"newfilename.sqlite"];
    

    doesn't work! I get following error:

    2011-04-11 17:19:54.164 ProjectName[5826:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Cannot create an NSPersistentStoreCoordinator with a nil model'
    *** Call stack at first throw:
    (
        0   CoreFoundation                      0x00fa15a9 __exceptionPreprocess + 185
        1   libobjc.A.dylib                     0x010f5313 objc_exception_throw + 44
        2   CoreData                            0x00013853 -[NSPersistentStoreCoordinator initWithManagedObjectModel:] + 419
        3   ProjectName                         0x00003471 -[ProjectNameAppDelegate persistentStoreCoordinator] + 257
        4   ProjectName                         0x000031a4 -[ProjectNameAppDelegate managedObjectContext] + 100
        5   ProjectName                         0x000028ca -[ProjectNameAppDelegate makeSplitViewController] + 762
        6   ProjectName                         0x00002d44 -[ProjectNameAppDelegate application:didFinishLaunchingWithOptions:] + 68
        7   UIKit                               0x001f3c89 -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1163
        8   UIKit                               0x001f5d88 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 439
        9   UIKit                               0x00200617 -[UIApplication handleEvent:withNewEvent:] + 1533
        10  UIKit                               0x001f8abf -[UIApplication sendEvent:] + 71
        11  UIKit                               0x001fdf2e _UIApplicationHandleEvent + 7576
        12  GraphicsServices                    0x018f9992 PurpleEventCallback + 1550
        13  CoreFoundation                      0x00f82944 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52
        14  CoreFoundation                      0x00ee2cf7 __CFRunLoopDoSource1 + 215
        15  CoreFoundation                      0x00edff83 __CFRunLoopRun + 979
        16  CoreFoundation                      0x00edf840 CFRunLoopRunSpecific + 208
        17  CoreFoundation                      0x00edf761 CFRunLoopRunInMode + 97
        18  UIKit                               0x001f57d2 -[UIApplication _run] + 623
        19  UIKit                               0x00201c93 UIApplicationMain + 1160
        20  ProjectName                         0x00002599 main + 121
        21  ProjectName                         0x00002515 start + 53
    )
    terminate called after throwing an instance of 'NSException'
    

    Note: I'm using Xcode4.

  • Mustafa
    Mustafa over 12 years
    That's the thing. The momd file is not renamed. How can i fix this?
  • Vincent Guerci
    Vincent Guerci over 12 years
    try a "hard clean" by deleting all build/ content. Check the build log in details to see what's generated (and why). Also take care of versioned models .xcdatamodel_d_ vs .xcdatamodelonly models (without d) will end in resources.
  • Luke
    Luke over 10 years
    Copying the file in finder and then deleting in xcode aswell as deleting the file not just the reference worked for me and re adding worked for me
  • Guillaume Laurent
    Guillaume Laurent over 3 years
    No they haven't, I'm using Xcode 11.4 and the problem is still the same. Renaming the xcdatamodeld won't rename the xcdatamodel file in it.

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