Find an updated NSManagedObject via NSPredicate

Question

I'm using some ManagedObjects with relationships: Customers have many Tasks.

During a server update, I need to update some customers and delete some tasks.

Obviously due to the deletion of a Task, the corresponding Customer is getting updated. I debugged it and I can find the Customer in the updatedObjects set of the Context.

Now I need to search for a specific Customer using a NSPredicate (customerId == 123) and a FetchRequest. The problem is that this request doesn't return a result. Obviously because the customer is changed.

This all runs in a kind of transaction, so I don't want to save the context between deleting the Task and searching for the customer.

What am I doing wrong? Or how do I deal with this scenario? Before searching via NSFetchRequest, I could iterate over the updatedObjects in the context, but I don't think this is a good solution?!

Answer 1

When ever your deleting the Task you need to remove mapping as well

- (void)removeTaskObject:(Task *)value;

Answer 2

I ended up with an new editing context for the changes to the data (removing a task). And using the main context (which is not yet affected by the changes) for the fetch. This is working.