Accessing meta-information on associations

[ghost]

One thing that would be useful is to be able to access meta information on associated objects. Here's an example of a use case:

Let's say that I have a Todo list with a list of Actions. Each Action hasMany Comments. I would like to find out how many comments an action has without loading the association and also find out whether the association has been loaded to determine whether I'm showing a collapsed or expanded comments view.

This would let me have a view that looks like this:

My cool action title!!!

• View 3 comments

My cool action title!!
comment 1
comment 2
comment 3

App.Action = DS.Model.extend({
   comments: DS.hasMany('App.Comment');
})

App.Comment = DS.Model.extend({
  body: DS.attr('string');
});

// Example request
a=App.store.findAll(App.Action);

// Response
{actions: [
 {"id":0 comment_ids: [123,456,321] }, ...
]

// This is what I'd like to be able to do
a.comments.isLoaded();   // or a.get('comments.isLoaded')
  => false
a.comments.count();  // or a.get('comments.count')
  => 3

a.get('comments');
 => // triggers a load request and returns an array of comments

a.comments.isLoaded();
  => true   // because the associated objects have been loaded

Hope this makes sense!

[ppcano]

+1, to provide a simple way to be notified when a list of items has been loaded either by callback functions or any binding to a property. This could be applied for associations and modelArrays.

[wagenet]

Duplicate of #83.

[ppcano]

@wagenet , peter you closed all the associated issues #83, and #190. is there already an implemented solution for this issue??

[wagenet]

#83 is not closed.