Ember.js：Handlebars不显示任何内容 [英] Ember.js: Handlebars displays nothing
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问题描述
/app.js
var Welcome = Ember.Application.create({});
Welcome.person = Ember.View.extend({
personName: 'Andrew'
});
以下是index.html的内容，视图的一部分：
Here is the content of the index.html, part of the view:
/index.html
<!doctype html>
<!--[if lt IE 7 ]> <html lang="en" class="ie6"> <![endif]--> <!--[if IE 7 ]> <html lang="en" class="ie7"> <![endif]--> <!--[if IE 8 ]> <html lang="en" class="ie8"> <![endif]--> <!--[if IE 9 ]> <html lang="en" class="ie9"> <![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--> <html lang="en"> <!--<![endif]-->
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title></title>
<meta name="description" content="">
<meta name="author" content="">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<script type="text/x-handlebars">
{{personName}}
</script>
<script src="js/libs/handlebars-1.0.0.beta.6.js"></script>
<script src="js/libs/ember-1.0.pre.min.js"></script>
<script src="js/app.js"></script>
</body>
</html>
我的问题是为什么不显示任何内容？不应该呈现 personName 的内容吗？
My question is why isn't it displaying anything? Shouldn't it render the content of personName?
更新：
我正在使用Ember的入门套件。它已经定义了一个视图。我只是添加了一个属性到对象，但仍然是不可见的视图。
I am using the Starter Kit from Ember. It already has a view defined. I just added one more property to the object but still it is not visible to the view.
App.MyView = Em.View.extend({
mouseDown: function() {
window.alert("hello world!");
},
name: 'Andrew'
});
.html中的视图部分是：
And the view part in .html is:
<script type="text/x-handlebars">
{{#view App.MyView}}
<h1>Hello world {{name}}!</h1>
{{/view}}
</script>
既然事件有效，这个名字是不是可以访问的？
Since the event works, isn't the name supposed to be accessible?
推荐答案
自1.0以来，视图保留了他们的上下文。
Since 1.0, the views preserve their context.
VIEW CONTEXT CHANGES
In apps built on earlier version of Ember (before 1.0), the {{#view}} helper
created a new context for the view. This meant that you had to explicitly set the
context on them.
In 1.0, we've made this a bit simpler. The {{#view}} helper no longer changes
the context, instead maintaining the parent context by default. Alternatively,
we will use the controller property if provided. You may also choose to directly
overridethe context property. The order is as follows:
Specified controller
Supplied context (usually by Handlebars)
parentView's context (for a child of a ContainerView)
In the event that you do need to directly refer to a property on the view, you
can use the view keyword, i.e. {{view.myProp}}.
So, for your example, tou have to use {{view.name}}
<script type="text/x-handlebars">
{{#view App.MyView}}
<h1>Hello world {{view.name}}!</h1>
{{/view}}
</script>
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