macOS Append a Group with Core Data

[Garrett]

Hello, again!

Here is my current NSOutlineView:

I am trying to figure out how to append a "Group", so it, it's all wrapped like:

Anyone have any ideas? I would assume I need to grab all my data, and append a group before inserting it?

 

[Garrett]

Any ideas?

I am sure someone knows how!

 

[Garrett]

No knows still?

 

[MrFusion]

No knows still?

I can try to answer.

I am not sure how your datamodel is constructed, but this is how I have it.

I have an entity called "Group", which has a "parent" (to one) and "children" (to many) relationship, with the inverse relationship set. To be clear, these two point to each other, it stays within this entity.
I have other entities, which are subclasses of the Group entity.

id parent = [NSEntityDescription insertNewObjectForEntityForName:groupEntityName inManagedObjectContext:moc];
id child = [NSEntityDescription insertNewObjectForEntityForName:childEntityName inManagedObjectContext:moc];
[parent addChildrenObject:child];

You could also move existing children into a parent node, by fetching them from the store.
First try to do this in code.
Drag and drop is a next step.