How to access deleted records in ember? - ember.js

Question

Assume I have a tasks application.
When the user updates a task an update button is enabled and the number of updated records is displayed. I do not manage to implement this when I delete a record.
For updates this is easily done in the controller:
App.TasksController = Ember.ArrayController.extend({
changedAmount: function(){
#filterBy('isDirty', true).get('length');
}.property('content.#each.isDirty');
})
But then when I delete a record using the deleteRecord function I don't manage to get the amount of changed/deleted records. Example:
App.TasksRoute = Ember.Route.extend({
.
.
actions: {
delete: function(task){
task.deleteRecord()
}
}
});
How can I access the deleted records or at least the amount of them?
My environment:
Ember : 1.3.1.1
Ember Data : 1.0.0-beta.6
Handlebars : 1.2.1
jQuery : 1.10.2

Answer 1

Looks like the property you're looking for is isDeleted. So you could modify that controller to be like:
App.TasksController = Ember.ArrayController.extend({
dirtyTasks: Ember.computed.filterBy('content', 'isDirty', true),
deletedTasks: Ember.computed.filterBy('content', 'isDeleted', true),
changedTasks: Ember.computed.union('dirtyTasks', 'deletedTasks')
});
Update:
I see what you mean about the content being autoupdated. I tracked this one down to the recordArrayManager being used by the Ember Store. When you issue either a find or a filter on the store, what is returned is a filtered record array, and one of the filters applied to that array is that none of the records in it can be in an isDeleted state. You can see that in action here.
Off the top of my head, I can't see a solution to this that I'm particularly satisfied with. But, if you absolutely need the content in your array controller to included deletedRecords, then you would need to override the method I linked to above in a custom RecordArrayManager class, and then set that recordArrayManager in the initialize for your application's store, as seen here.
Here's a jsbin demonstrating it
Note that this is a dirty hack and you really shouldn't do it. Frankly, I think a better solution would be to, instead of deleting the record using ember data methods, come up with your own flagged customIsDeleted state and set the model in that state instead of outright deleting it, if you really want it to stay on the screen.