A small step ahead... ... the following code seems to create an instance of MyEntity and sets the attribute 'attribute1' to the value 'Test'. entityDesc = NSEntityDescription.new entityDesc.setName("MyEntity") att = NSAttributeDescription.new att.setAttributeType(NSStringAttributeType) att.setName("attribute1") entityDesc.setProperties([att]) instance = MyEntity.alloc.initWithEntity(entityDesc, insertIntoManagedObjectContext:nil) instance.setValue("Test", forKey:"attribute1") Two question arising from this code: a) Is it really THAT complicated to create an instance of MyEntity and set the attribute? I'm coming from the Rails/ActiveRecord world where this could easily be done with a single line of code (including saving the instantiated object): MyEntity.new(:attribute1 => "Test").save ) b) How can I save this fresh instance and update my NSTableView? Regards, Timo Am 13.11.2011 um 22:20 schrieb Timo Springmann:
Hi List,
I've successfully created a core data entity with some attributes. I'm displaying object in a NSTableView and I was able to add new instances by calling the entities array controller add: action.
The last hour I tried to figure out how to add/create a core data entity in ruby code without using the interface builder. I tried to instantiate a new object like this:
MyEntity.new
but I always get the following error:
Failed to call designated initializer on NSManagedObject class 'MyEntity'
What's the proper way of doing this?
For rails-devs: I'm looking for something like: a = MyARObject.new a.attribute1 = "test" a.attribute2 = "test2 a.save
Regards, Timo
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