在ArrayController模型的已过滤子集上设置itemController [英] Setting itemController on a filtered subset of an ArrayController's model
问题描述
问题摘要:虽然我可以收集一个集合的子集(在ArrayController上定义)为个人使用特定的对象控制器,但这对于子项的过滤子集不起作用。
Problem Summary: While I can get the children of a collection (defined on an ArrayController) to use a specific object controller for the individuals, this doesn't work on filtered subsets of the children.
短上下文:我有Subcriptions,它们有Items。我想按照类型筛选我的视图中的订阅项,并将这些订阅中的项目按时间戳排序。这是订阅控件:
Short context: I've got Subcriptions, which have Items. I'd like to filter the subscriptions in my view by type, and have the items within those subscriptions sort by timestamp. Here's the SubscriptionsController:
Social.SubscriptionsController = Ember.ArrayController.extend({
itemController: 'subscription',
announcements: function() {
return this.get('model').filterBy('kind', 'announcement');
}.property('model.@each.kind'),
user_sites: function() {
return this.get('model').filterBy('kind', 'user');
}.property('model.@each.kind')
});
我已经定义了SubscriptionController:
I've defined SubscriptionController thusly:
Social.SubscriptionController = Ember.ObjectController.extend({
items: function() {
return Ember.ArrayProxy.createWithMixins(Ember.SortableMixin, {
sortProperties: ['post_timestamp'],
sortAscending: false,
content: this.get('content.items')
});
}.property('content.items'),
});
这里是我的手柄模板的相关位:
And here's the relevant bit of my handlebars template:
{{#each controller}}
<li>{{controller.description}} {{controller.kind}} {{controller.feed_url}} {{controller.base_url}}</li>
<ul>
{{#each item in controller.items}}
<li>{{item.post_timestamp}}: {{{item.summary}}}</li>
{{/each}}
</ul>
{{/each}}
该代码或多或少地做我想要的:它按照SubscriptionController定义它来呈现项目,按item.post_timestamp排序。
That code more-or-less does what I want: it renders the items, sorted by item.post_timestamp, as SubscriptionController defines it.
问题是如果我更改 {{#每个控制器} }
到 {{#user_sites中的每个网站}}
,itemController属性似乎并不适用于子列表。有没有什么样的巫术我应该用来通知我的过滤器,我宁愿返回控制器的对象而不是对象本身?
The problem is if I change {{#each controller}}
to {{#each site in user_sites}}
, the itemController property doesn't seem to magically apply to the sublist. Is there some kind of Sorcery I should use to inform Ember in my filters that I'd rather return the controller for the objects rather than the objects themselves?
编辑添加:我知道我可以在Subscription模型本身添加一个像sorted_items这样的新的属性,但是设计上是错误的。该模型保存数据,视图显示数据,控制器处理排序/过滤以及所有爵士乐。或者至少这是我如何考虑MVC分离的一部分。
EDITed to add: I know I can just add a new property like sorted_items on the Subscription model itself, but this feels wrong, design-wise. The model holds the data, the view shows the data, and the controller deals with sorting / filtering and all that jazz. Or at least that's part of how I think about MVC separation.
推荐答案
您可以手动设置 itemController
for循环。您可以在模板中尝试:
You can manually set the itemController
for loops. You might try this in your template:
{{#each site in user_sites itemController="subscription"}}
...
{{/each}}
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