iOS Core Data - Relationships

Question

I’m guessing this is a basic question and hopefully someone will be able to point me in the right direction to some sample code, so my question….

I want/have created a core data model that has a parent child relationship, one to many, what I would like to know is what is the correct way to insert child records if the parent already exists. What I’m struggling to understand is how the parent relationship is created when only inserting child records.

Hopefully this makes sense, thanks for any help.

Answer 1

Here You have a series of 3 tutorials: RayWenderlich: Core Data Tutorial

Here a sample app: iPhoneCoreDataRecipes with a more complex data model

Here a Core Data tutorial – One to Many Relationship

Sorry I not respond to your question in his totally. I'm also starting with Core Data, so If You find a good intermediate tuturial, please let me know.

EDIT: A nice article: Core Data Class Overview

Answer 2

So you'll have Parent and Child. Child will contain a Parent *parentobject while Parent will contain a NSSet *children. Whenever you set the relationship correct in the Datamodel the relationship will be applied automatically when you fill the children set with Child objects.

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