You can use Ember.ArrayController to represent an array of models. To tell an
ArrayController
which models to represent, set its model
property
in your route's setupController
method.
You can treat an ArrayController
just like its underlying array. For
example, imagine we want to display the current playlist. In our route,
we setup our SongsController
to represent the songs in the playlist:
export default Ember.Route.extend({
setupController: function(controller, playlist) {
controller.set('model', playlist.get('songs'));
}
});
In the songs
template, we can use the {{#each}}
helper to display
each song:
You can use the ArrayController
to collect aggregate information about
the models it represents. For example, imagine we want to display the
number of songs that are over 30 seconds long. We can add a new computed
property called longSongCount
to the controller:
export default Ember.ArrayController.extend({
longSongCount: function() {
var longSongs = this.filter(function(song) {
return song.get('duration') > 30;
});
return longSongs.get('length');
}.property('@each.duration')
});
Now we can use this property in our template:
Sorting
The Ember.ArrayController
uses the Ember.SortableMixin to allow sorting
of content. There are two properties that can be set in order to set up sorting:
export default Ember.ArrayController.extend({
sortProperties: ['name', 'artist'],
sortAscending: true // false for descending
});
Item Controller
It is often useful to specify a controller to decorate individual items in
the ArrayController
while iterating over them. This can be done by
creating a Controller
:
export default Ember.Controller.extend({
name: Ember.computed.alias('model.name'),
artist: Ember.computed.alias('model.artist'),
fullName: function() {
return this.get('name') + ' by ' + this.get('artist');
}.property('name', 'artist')
});
Then, the ArrayController
itemController
property must be set to
the decorating controller.
export default Ember.ArrayController.extend({
itemController: 'song'
});
or you could setup the itemController
directly in the template:
export default Ember.ArrayController.extend({
});