In our app under development we are using Core Data with a sqlite backing store to store our data. The object model for our app is complex. Also, the total amount of data served by our app is too l...

I've successfully completed light weight migration on my core data model. My custom entity Vehicle received a new property 'tirePressure' which is an optional property of type double with the defa...

I've found documentation very limited and my problem solution nowhere. I need to add new entity (with relationship to existing one). Also add and rename some of attributes of existing entity. Lig...

We have an app that is currently in the app store. It uses Core Data as its persistence mechanism. We have a new version ready to go, and it has some schema changes. Specifically, we have added 1 n...

My iPhone app needs to migrate its core data store, and some of the databases are quite large. Apple's documentation suggests using "multiple passes" to migrate data to reduce memory use. However, ...

The Problem I've got 13 versions of my core data model. I've made 13 mapping models (V1-V2, V2-V3 etc) I've got automatic migration switched on. On migration between two consecutive versions (e.g...

The first deployment to an IOS device for my application is crashing as I'm getting a: "'no such table: Z_METADATA'" error. I have copied the SQLite file across from my device and opened it up in a...

I'm trying to migrate an iPhone/iPad sqlite store of about 11Mb. It has around thirty different entities, all quite heavily interrelated. On a 3GS, it takes quite some time. Even a lightweight mi...

I just started with iPhone core data and I ran into a problem in lightweight migration. I added two new fields to my old model Regenerated the model class files Made the new model version as curr...

I am getting a strange crash from some of my beta testers that I am having trouble with. The symbolicated crash reports indicate that the crash is occurring in the simple allocation of a controller...

I'm migrating a CoreData model between two versions of an application. I was storing binary data as blobs in the previous version and I want to take them out of the blobs for performance. My issue ...

I have a cocoa application using core-data, which is now at the 4th version of its managed object model. My managed object model contains abstract entities but so far I have managed to get migrat...

So I created a new version of my data model, and made a previously optional field non-optional (giving it a default value). According to the documentation, this should mean my migration is eligible...

My situation is similar to this question. I am using lightweight migration with the following code, fairly vanilla from Apple docs and other SO threads. It runs upon app startup when initializing t...

It seems like this should be straight forward but I have not been able to find a good example of it. I have a simple Core Data entity that I want to split into two separate entities. Apple's docume...