在Ember中按不同模型的属性排序

Question

I understand that you can sort different properties in ascending/descending orders by doing the following:

App.TestsController = Ember.ArrayController.extend(
    sortProperties: ['testDate:desc', 'name:asc']
    sortedObjects: Ember.computed.sort('content', 'sortProperties')
)

and then referencing sortedObjects in {{#each}}. However, in the case that each test has a user associated with it, is there a way we can also sort by the user's properties? I've noticed that when I just sort by test properties or user properties, everything works fine, but when I do this:

App.TestsController = Ember.ArrayController.extend(
    sortProperties: ['testDate:desc', 'user.lastName:asc']
    sortedObjects: Ember.computed.sort('content', sortProperties')
)

I get an "Index out of range" error. Will I need to use my own sort to accommodate sorting through different models?

Answer 1

Try binding the object property to the controller:

App.TestsController = Ember.ArrayController.extend(
    needs: ['user'],
    lastName: '',
    lastNameBinding: 'controllers.user.lastName',
    sortProperties: ['testDate:desc', 'lastName:asc']
    sortedObjects: Ember.computed.sort('content', sortProperties')
)

You could also try a computed property.

Answer 2

So what ended up being the issue was how I was setting up connections between tests and users. At first I was connecting users to tests in the setupController, which resulted in users being returned as promises to the controller. When I moved the process to the model hook, my loading screen was no longer showing up. If anyone runs into the same problem, I followed this article by Balint Erdi.