CODEWITHSUNDEEP
iosxcodecore-datansmanagedobject
Declan Land
Declan Land

Reputation: 650

NSManagedObject Transformable Array of custom objects null/unpopulated

I have a core data model like so:

User
- objectId
- access (transformable - array of "User_Access")

CustomObject
- objectId
- name
- etc

User_Access
- customObject

The objects save correctly and the transformable access array properly is filled, but on the second use of the app, the "access" array is an array of unfilled objects:

"<User_Access: 0x6060001746e0> (entity: <null>; id: (null); data: <fault>)"

I'm using a fetch request like so:

NSFetchRequest *fetch = [NSFetchRequest fetchRequestWithEntityName:@"User"];
[fetch setReturnsObjectsAsFaults:NO];
[fetch setIncludesSubentities:YES];
[fetch setIncludesSubentities:YES];
NSArray *test = [[SPModel objectContext] executeFetchRequest:fetch error:nil];
    
if (test.count == 0) {
    return nil;
}
    
User *user = (User *)test.firstObject;

The fetch request fetches the properties of the user object perfectly, but the transformable "access" array is unpopulated.

Upvotes: 0

Views: 25

Answers (1)

Declan Land
Declan Land

Reputation: 650

Solved!

Instead of using transformables to store an array of core data objects, use a relationship and set the destination to the custom object class, and change the type from To One to To Many.

This will require you change your property in your header file to an NSSet instead of an NSArray.

Upvotes: 1

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