CODEWITHSUNDEEP
ioscocoa-touchcore-data
Fuzej
Fuzej

Reputation: 97

Core Data relationship error

I want to save a Goal and an Actor. The two entities are related with an Responsibility-relationship:

Goal *addgoal = (Goal*)[NSEntityDescription insertNewObjectForEntityForName:@"Goal" inManagedObjectContext:context];

    addgoal.goalNaam = nameTextField.text;
    addgoal.goalId = idField.text;
    addgoal.goalBeschrijving = beschrijvingField.text;

    Actor *addactor = (Actor*)[NSEntityDescription insertNewObjectForEntityForName:@"Actor" inManagedObjectContext:context];

    addactor.actorNaam = responsibleField.text;

    [addgoal addResponsibilityObject:addactor];

the line above ([addgoal addResponsibility:addactor]) is causing the error, what is wrong ?

in Goal.h:

@interface Goal (CoreDataGeneratedAccessors)
- (void)addResponsibilityObject:(Actor *)value;
@end

Error:

2012-08-02 20:57:11.838 Choose3[7434:fb03] -[__NSCFSet entity]: unrecognized selector sent to instance 0x8877810 2012-08-02 20:57:11.840 Choose3[7434:fb03] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFSet entity]: unrecognized selector sent to instance 0x8877810'

Upvotes: 1

Views: 1109

Answers (2)

Andrei Herford
Andrei Herford

Reputation: 18729

I just encountered the same problem. The solution here was, that I forgot to check the "To-Many" option in the relationship options within the model inspector.

Upvotes: 6

Phillip Mills
Phillip Mills

Reputation: 31016

It appears that Core Data is confused about the nature of the Responsibility relationship. I suggest creating NSManagedObject subclasses that match the current state of your data model.

One way to create this error would be to change a to-many relationship into a to-one relationship without re-generating the entity class files.

Upvotes: 0

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