【发布时间】：2013-11-06 13:18:00
【问题描述】：
我有一个 Ember.js (1.0.0) 应用程序，我正在尝试为其实现内置的 Ember.Select 视图。
此应用程序显示三个任务列表：inProgress、completed 和 unassigned。用户可以过滤其相应项目显示的任务。这就是 Ember.Select 视图的用武之地。但是，当我加载路线时，Ember 对我咆哮着说我给它的值的类型：
Assertion failed: The value that #each loops over must be an Array. You passed projects.all
Uncaught TypeError: Object projects.all has no method 'addArrayObserver'
Uncaught Error: Something you did caused a view to re-render after it rendered but before it was inserted into the DOM.
我已经为此苦苦挣扎了几个小时，尝试了下面代码的不同排列 - 我知道我必须遗漏了一些明显的东西，因为它只是 不能很难让这么简单的组件正常工作。希望你们能指出我正确的方向。
这是我的路线：
Bee.TasksIndexRoute = Bee.Auth.Route.extend
setupController: (ctrl) ->
# get tasks
Bee.Auth.send
url: Bee.endpoint "/tasks"
.done (tasks) ->
ctrl.set "tasks.all", tasks
# get projects
Bee.Auth.send
url: Bee.endpoint "/projects"
.done (projects) ->
ctrl.set "projects.owned", projects.owned
ctrl.set "projects.participating", projects.participating
ctrl.set "projects.all", projects.owned.concat projects.participating
这是我的控制器：
Bee.TasksIndexController = Ember.ObjectController.extend
project: null
content:
tasks:
all: []
inProgress: []
completed: []
unassgined: []
projects:
all: []
owned: []
participating: []
visible: (->
ctrl = @
# filter tasks here
).property "project"
这是我的模板：
<script type="text/x-handlebars" id="tasks/index">
<div class="center-pane">
<div class="top_options">
<div class="project_filter">
<strong>Viewing: </strong>
{{view Ember.Select
content=projects.all
optionValuePath='content._id'
optionLabelPath='content.title'
value=project
prompt='All Tasks'
}}
</div>
<strong class="gold-gradient option_button">
{{#link-to 'tasks.create' classNames='new_task'}}Create Task{{/link-to}}
</strong>
</div>
<div class="col3">
<div class="col-header in-progress light-gradient">
<h3>In Progress</h3>
</div>
<div id="tasks_active_list">
{{#if visible.inProgress.length}}
<ul>{{#each visible.inProgress}}{{view Bee.TaskListView}}{{/each}}</ul>
{{else}}
<p class="no_projects">None</p>
{{/if}}
</div>
</div>
<div class="col3">
<div class="col-header completed light-gradient">
<h3>Completed</h3>
</div>
<div id="tasks_closed_list">
{{#if visible.completed.length}}
<ul>{{#each visible.completed}}{{view Bee.TaskListView}}{{/each}}</ul>
{{else}}
<p class="no_projects">None</p>
{{/if}}
</div>
</div>
<div class="col3">
<div class="col-header unassigned light-gradient">
<h3>Unassigned</h3>
</div>
<div id="tasks_unassigned_list">
{{#if visible.unassigned.length}}
<ul>{{#each visible.unassigned}}{{view Bee.TaskListView}}{{/each}}</ul>
{{else}}
<p class="no_projects">None</p>
{{/if}}
</div>
</div>
</div>
</script>
任何见解将不胜感激。我知道Ember.Select 是罪魁祸首，因为当我用简单的替换它时：
<select>
{{#each projects.all}}
<option value="{{_id}}">{{title}}</option>
{{/each}}
</select>
...它渲染得很好-但是我需要使用Ember.Select，因此我可以将值绑定到TasksIndexController上的project属性-因为我将使用它作为触发@987654337的可观察值@函数。
【问题讨论】：
标签： javascript ember.js coffeescript