Sort by entity name in NSFetchRequest

Question

I have a fetched results controller that should display all items of a certain entity that has a number of subentities.

The sections in the fetched results controller should be based on the entity name, i.e which subentity an item belongs to. Setting the sectionNameKeyPath to @"entity.name" works.

It seems, however, to be impossible to get the right sort descriptor for the fetch request. Things like [NSSortDescriptor sortDescriptorWithKey:@"entity.name" ascending:YES] result in errors like keypath entity.name not found in entity Something.

Answer 1

Try using [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES]; You don't need the preceding entitiy, since the entitiy ist already defined by the fetch request. See also the Sort Descriptor Class Reference.