是的。在您的控制器中,您必须创建一个属性以在使用Ember.Select
.
在下面的代码中,我将 Greetings 设置为选择框的内容,在列出这些 Greetings 的控制器中(检查ApplicationRoute
),我还有一个名为的属性selectedItems
,我将其绑定到Select
并且我正在使用其他几个属性来过滤我想要预选的值(1 和 3),以防在视图加载时尚未选择任何项目。
这将呈现一个多选框,其中 id 为 1 或 3 的项目标记为选中。你可以在这里看到源代码:http: //jsfiddle.net/schawaska/Y8P4m/
车把:
<script type="text/x-handlebars">
<h1>Test</h1>
{{view Ember.Select
multiple="true"
selectionBinding="controller.selectedItems"
contentBinding="controller"
optionLabelPath="content.text"
optionValuePath="content.id"}}
</script>
JavaScript:
window.App = Ember.Application.create();
App.Store = DS.Store.extend({
revision: 11,
adapter: 'DS.FixtureAdapter'
});
App.Greeting = DS.Model.extend({
text: DS.attr('string'),
when: DS.attr('date'),
selected: false,
isSelected: function() {
return this.get('selected');
}.property('selected')
});
App.ApplicationController = Em.ArrayController.extend({
preselected: function() {
return this.get('content').filter(function(greeting) {
return greeting.get('id') == 1 ||
greeting.get('id') == 3;
});
}.property('content.@each'),
selectedItems: function() {
if(this.get('selected.length') <= 0) {
return this.get('preselected');
} else {
return this.get('selected');
}
}.property('selected', 'preselected'),
selected: function() {
return this.get('content').filter(function(greeting) {
return greeting.get('isSelected');
})
}.property('content.@each')
});
App.Greeting.FIXTURES = [
{id: 1, text: 'First', when: '3/4/2013 2:44:52 PM'},
{id: 2, text: 'Second', when: '3/4/2013 2:44:52 PM'},
{id: 3, text: 'Third', when: '3/4/2013 2:44:52 PM'},
{id: 4, text: 'Fourth', when: '3/4/2013 3:44:52 PM'}
];
App.ApplicationRoute = Em.Route.extend({
setupController: function(controller) {
controller.set('model', App.Greeting.find());
}
});