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Questions tagged [xcdatamodel]

113 questions
176
votes
4 answers

How to delete an old/unused Data Model Version in Xcode

How can I delete an old Data Model in Xcode? The option is disabled on the menu. (The models I want to delete have not been released to the public - they are interim development models.)
SAHM
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19
votes
1 answer

Mogenerator not found by Xcode

I'm trying to use Mogenerator in my iOS project developed in Xcode 5. I've installed Mogenerator with brew: brew install mogenerator then link: brew link mogenerator After that I have access to this tool from my command line. Next I'm trying to…
Gie
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18
votes
1 answer

What are Fetch Index Elements in the CoreData Model?

In my xcdatamodel two new fields, byTitleIndex and compoundIndex, are showing under Fetch Index Elements. I have not seen this section before in Xcode. What is a Fetch Index Element?
lostAtSeaJoshua
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11
votes
2 answers

Change order of .xcdatamodel entries in .xcdatamodeld file

I have several Core Data model version that I have added to my .xcdatamodeld file, and this last version that I added did not show up at the top of the list as it normally does, it is the 2nd item in the list under the .xcdatamodeld file. I set the…
BP.
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10
votes
5 answers

This NSPersistentStoreCoordinator has no persistent stores (schema mismatch or migration failure). It cannot perform a save operation

I am working on a application in which we are using x.x.xcdatamodel. Now in same x.x.xcdatamodel I have added an attribute in one of the entity. The application crashes showing the message "This NSPersistentStoreCoordinator has no persistent stores…
Uzair Dhada
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9
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3 answers

Compatibility problem with .xcdatamodeld between Xcode 4.1 (Lion) and Xcode 3.2.5 (snow leopard)

I have a problem with a Data Model using Core Data. 1/ I've created a data model on xcode 4.1 (on lion) with my entities and their relationships. In the inspector on the right i've checked "Tools version" : Minimum : Xcode 3.2 instead of Xcode…
Nicolas
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8
votes
4 answers

Core data Migration Delete data of entity

I want to do Lightweight migration in core-data. I am adding an attribute to an entity which is working well. But I want after this particular migration that entity's data (all objects contained in that entity's table) to be deleted. I gone through…
SandeepAggarwal
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8
votes
5 answers

Xcode Data Model Compiler - MOMC Error: Command momc failed with exit code 1

I am having troubles integrating XMPP on my iOS Project using Xcode 4.4 under Mac Mountain Lion OS X. I followed every step but I got stuck with this problem: Command momc failed with exit code 1 See screenshot: I have deleted all the…
emmandroid
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6
votes
2 answers

Can I still use xcdatamodel core data model relationships with Restkit?

As I understand it RestKit provides integration with Apple’s Core Data framework, making and populating Core Data associations for you, allowing natural property based traversal of your data model. However, I am unsure if I can still use xcdatamodel…
zardon
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6
votes
1 answer

Access FetchRequest from xcdatamodel in iOS

I'm using NSPersistentContainer to access my core data in iOS10 app and Xcode 8. Similar to Entity, I added a "UserFetchRequest" in my Coredata xcdatamodel. Below is the screen shot. How can I access the "UserFetchRequest" in the code?
Satyam
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6
votes
2 answers

Swift get specific NSManagedObject from entity (core data)

I have an entity in my "ProjName.xcdatamodel" with the name "Questions". In this entity I have 5 attributes ("icehockey","volleyball","soccer",...), each with type transformable. Each row (attribute) will be filled with a NSMutableArray. What I want…
user2099024
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5
votes
1 answer

How to represent Foreign Key relationships in Core Data - Data Model in XCode

Totally new with Core Data, I'm making my data model. I have 33 entities, and few hard relationships between them but lots of Foreign-Key relationships. How can I manage that relationships that are not exactly 1-many or 1-1 or many-many but are…
calamandurrio
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5
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1 answer

How to Turn xcdatamodel file into xcdatamodeld file?

I still have an xcdatamodel file. However, when I created a new project, xcode generate an xcdatamodeld file (with a d). I want to convert my xcdatamodel file into xcdatamodeld file. I know that xcdatamodeld is some form of directory. How would I do…
user4951
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4
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1 answer

Does adding a new entity in Core Data require a new model version or migration in 2020

It used to be the case that adding an entity to a model in Core Data required a new version of the model if the App is already in the App Store. See this answer and also this one. However, I believe that Apple has simplified the migration process so…
user1904273
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4
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2 answers

Error in xcdatamodel

My xcdatamodel file in Xcode seems to be behaving weirdly. When I build my project for the first time it gives an error "Unable to write VersionInfo.plist for the versioned model at " and "Compilation failed for data model at path…
evanescent
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