CoreData warning: File.children -- to-many relationship does not have an inverse:
CoreData warning: File.children -- to-many relationship does not have an inverse:
- Subject: CoreData warning: File.children -- to-many relationship does not have an inverse:
- From: Ignacio Enriquez <email@hidden>
- Date: Wed, 4 Aug 2010 05:37:09 +0900
Hi,
I am having some trouble modeling my data. I would like to implement
the following:
User can create files and folders (they don't have to be real folders/files).
Folders can contain files or other folders
Files have:
title,
summary and
8 children
Each child also has a title and a summary and could have 8 children (optionally)
This could be as many levels (recursive) as the user desires.
I am not sure how to express this in CoreData. Could someone give a hand here?
This is what I've done: http://yfrog.com/j2o1op
"Child" entity with "title" and "summary" attributes and "children"
(to-many) relationship pointing to "Child" entity
"File" entity with "isDirectory" and "name" attributes and "files"
(to-many) relationship pointing to "File" entity and "children"
(to-many) relationship pointing to "Child" entity.
Doing that gets me a warning:
File.children -- to-many relationship does not have an inverse: this
is an advanced setting (no object can be in multiple destinations for
a specific relationship)
Why is that? I've tried to set the inverse relationship but there are
no options to choose from.
I am not sure if this well implements above structure. I am in the right way?
Thanks in advance.
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