如何在#each循环中使用Ember.Object实例

Question

我正在整理我的第一个Ember应用程序，但数据有些麻烦。 看来我的选择是：

• 通过Ember Data（类似的声音尚未准备就绪 ， 可能已损坏 ）
• 通过Ember.Object（在遍历这些对象时遇到麻烦）
• 通过一个普通的JS数组（我怀疑这太简单了）

我猜测要走的路是使用Ember.Object实例：

// Attempt to modify the Blog Tutorial (http://emberjs.com/guides/) to use Ember.Object for data
App.Posts = Ember.Object.extend([
{
    id: '1',
    title: "Rails is Omakase",
    author: { name: "d2h" },
    date: new Date('12-27-2012'),
    body: "I want this for my ORM, I want that for my template language, and let's finish it off with this routing library. Of course, you're going to have to know what you want, and you'll rarely have your horizon expanded if you always order the same thing, but there it is. It's a very popular way of consuming software.\n\nRails is not that. Rails is omakase."
}, {
    id: '2',
    title: "The Parley Letter",
    author: { name: "d2h" },
    date: new Date('12-24-2012'),
    body: "A long list of topics were raised and I took a time to ramble at large about all of them at once. Apologies for not taking the time to be more succinct, but at least each topic has a header so you can skip stuff you don't care about.\n\n### Maintainability\n\nIt's simply not true to say that I don't care about maintainability. I still work on the oldest Rails app in the world."  
}
]);
posts = App.Posts.create();

但是然后我无法遍历这些数据：

<!-- === POSTS === -->
<script type="text/x-handlebars" id="posts">
  <table class='table'>
    <thead>
      <tr><th>Recent Posts</th></tr>
    </thead>
    {{#each model}}
      <tr><td>
        {{#link-to 'post' this}}{{title}} <small class='muted'>by {{author.name}}</small>{{/link-to}}
      </td></tr>
    {{/each}}
  </table>

  {{outlet}}
</script>

我的检查器控制台显示：

Denying load of chrome-extension://ganlifbpkcplnldliibcbegplfmcfigp/scripts/vendor/jquery/jquery.min.map. Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension. (index):1
DEBUG: -------------------------------                                ember-1.0.0-rc.8.js:382
DEBUG: Ember.VERSION : 1.0.0-rc.8                                     ember-1.0.0-rc.8.js:382
DEBUG: Handlebars.VERSION : 1.0.0                                     ember-1.0.0-rc.8.js:382
DEBUG: jQuery.VERSION : 1.9.1                                         ember-1.0.0-rc.8.js:382
DEBUG: -------------------------------                                ember-1.0.0-rc.8.js:382
Assertion failed: Expected hash or Mixin instance, got [object Array] ember-1.0.0-rc.8.js:382
Assertion failed: The value that #each loops over must be an Array. You passed <App.Posts:ember284>   ember-1.0.0-rc.8.js:382
Uncaught TypeError: Object [object Object] has no method 'addArrayObserver'     ember-1.0.0-rc.8.js:21860
Ember Debugger Active
Resource interpreted as Script but transferred with MIME type text/html: "http://www.superfish.com/ws/sf_main.jsp?dlsource=tduqbwo&userId=834F74FF-83A8-4EDB-BC8A-9433A559E216".

那么如何遍历Ember.Object实例中的数据？

Answer 1

你的所作所为是错误的（我认为）。 您创建了一个App.Posts实例，该对象的内容是一个数组。 可以说，您应该创建App.Post实例（单数），并将其放入数组中。 所做的事情是，App.Posts实例是一个对象，您已将其分配给控制器的内容，因此，它只是一个（不是数组）对象，并且在视图中尝试迭代它，但它不是数组，如果要遍历它，请尝试：

{{#each post in model.content}}
  <tr><td>
    {{#link-to 'post' this}}{{post.title}} <small class='muted'>by {{post.author.name}}</small>{{/link-to}}
  </td></tr>
{{/each}}

看看是否可行。 还要尝试我说的话，更好。