如何在进行转换时从Ember路径调用控制器操作？

Question

我的目标是在我的页面上显示一个花哨的"loading ..."图形,而Ember通过Ember路线获取模型数据.

这导致我http://emberjs.com/guides/routing/loading-and-error-substates/.这激发了我在我的页面控制器上创建一个动作,它将在DOM中显示"加载"覆盖窗口.例如,这是我的控制器:

控制器/ users.js:

export default Ember.ArrayController.extend({
    ...
    actions: {
        displayLoading: function() {
            // Show the DOM element that says "Loading..."
        },
        ...
    }
});

我想在我的数据加载时调用它,所以我然后定义一个路由如下:

路线/ users.js:

export default Ember.Route.extend({
    model: function( params ) {
        return this.store.find('user', params );
    },

    actions: {
        loading: function(transition, originRoute) {
            transition.send('displayLoading');
        }
    }
});

但是,当我这样做时,我收到此错误:

Uncaught Error: Nothing handled the action 'displayLoading'. If you did handle the action, this error can be caused by returning true from an action handler in a controller, causing the action to bubble.

所以我的问题是我在哪里可以定义此操作,以便我的loading方法可以调用它？

请注意,尝试this.send('displayLoading')给了我这个错误:

Can't trigger action 'displayLoading' because your app hasn't finished transitioning into its first route. To trigger an action on destination routes during a transition, you can call .send() on the Transition object passed to the model/beforeModel/afterModel hooks..

更新:我能够在路线本身上捕捉到这个动作,但是我仍然无法在我的控制器上调用该动作.

更新#2:感谢@ kingpin2k的回答,我已经解决了这个问题.对于那些感兴趣的人,这是一个完整的解决方

控制器/ users.js:

export default Ember.ArrayController.extend( {
    actions: {
        showLoading: function() {
            this.set('isLoading', true);
        },

        hideLoading: function() {
            this.set('isLoading', false);
        },
    }
});

路由器/ users.js:

export default Ember.Route.extend({

    model: function( params ) {
        return this.store.find('user', params );
    },

    actions: {
        loading: function() {
            this.controllerFor('users').send('showLoading');
        },
        didTransition: function() {
            this.controllerFor('users').send('hideLoading');
        }
    }

});

一个关键的洞察力是我可以isLoading在我的控制器上设置一个属性,它确定我的模态"加载..."窗口是否显示在Handlebars模板中.

Answer 1

使用controllerFor,http://emberjs.com/api/classes/Ember.Route.html#method_controllerFor

    loading: function(transition, originRoute) {
        var controller = this.controllerFor('foo');
        controller.send('displayLoading');
    }