{{#each}} 内的车把助手 [英] Handlebar helper inside {{#each}}

问题描述

我尝试在 {{#each}} 循环中调用注册的车把助手.不幸的是 Ember.js 抱怨，因为它试图将帮助器解析为控制器的属性而不是帮助器.

I try to call a registered handlebar helper inside a {{#each}} loop. Unfortunately Ember.js complains because it tries to resolve the helper as a property of the controller rather than a helper.

Handlebars.registerHelper('testHelper', function(name) {
    return 'foo: ' + name
});

(名称和内容只是显示示例的虚拟值)

(names and content are just dummy values to show the example)

{{#each entry in App.testController}}
   <div>{{{testHelper entry.name}}}</div>
{{/each}}

Ember.js 打印的错误是:

The error that the Ember.js prints is:

Uncaught Error:  Handlebars error: Could not find property 'testHelper' on object <App.testController:ember254>.

我需要如何调用已注册的助手以使其被识别?

How do I need to call the registered helper so that it gets recognized?

推荐答案

使用 这个解决方案让它运行起来,

Javascript

Handlebars.registerHelper('testHelper', function(property, options) {
  return 'foo: ' + Ember.get(options.data.view.content, property);
});

车把模板

<script type="text/x-handlebars" data-template-name='app-view'>
  <ul>
  {{#each entry in content}}
    <li>{{testHelper name}}</li>
  {{/each}}
  </ul>
</script>​

甚至更好，有了这个:

Javascript

Handlebars.registerHelper('testHelper', function(property) {
  return 'foo: ' + Ember.get(this, property);
});

车把模板

<script type="text/x-handlebars" data-template-name='app-view'>
  <ul>
  {{#each entry in content}}
    {{#with entry}}
      <li>{{testHelper name}}</li>
    {{/with}}
  {{/each}}
  </ul>
</script>​

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