在每个帮助器中调用的组件中的yield [英] yield in component that is called from an each helper

问题描述

这是我组件模板的一部分：

This is part of my component's template:

{{#each displayResults}}
  <li {{action addSelection this}} {{bindAttr class=\":result active\"}}>
  {{#if controller.template}}
    {{yield}}
  {{else}}
    <span class=\"result-name\">{{displayHelper controller.searchPath}}</span>
  {{/if}}
  <\/li>
{{/each}}

我希望用户能够自定义html

I want the user to be able to customise the html that is used to display the results.

问题是{{yield}}在{{{e ++}}助手中被调用，如果组件是声明如下：

The problem is that the {{yield}} is called while in an {{#each}} helper and if the component is declared like this:

{{#auto-suggest source=controller.employees destination=controller.chosenEmployees}}
<span class=\"result-name\"><img src="img/small_avatar.png"/>{{fullName}}</span>
{{/auto-suggest}}

然后{{#auto -suggest}}在组件中没有{{#each}}帮助器的上下文。

Then the block between the {{#auto-suggest}} does not have the context of the {{#each}} helper in the component.

有什么我可以做的还是这样呢是

Is there anything I can do or is this just the way it is?

推荐答案

更新

现在 ember 1.10 已经降落，引入了一种称为块参数的新语法。所以没有必要重写 _yield 方法。例如，在您的组件模板中，您可以执行以下操作：

Now that ember 1.10 has landed, a new syntax was introduced called block params. So there is no need to override the _yield method. For instance inside of your component's template you do:

<ul>    
  {{#each item in source}}
    <li>
    {{! the component is being used in the block form, so we yield}}
    {{#if template.blockParams}}
      {{yield item}}
    {{! no block so just display the item}}
    {{else}}
      {{item}}
    {{/if}}
    </li>
  {{/each}}
</ul>

然后当使用组件时，您会得到传递给 {{yield使用作为| var |

And then when using the component you get the params passed to {{yield}} using as |var|

{{! no block, the component will just display the item}}
{{auto-suggest source=model as |item|}}

{{! in the block form our custom html will be used for each item}}
{{#auto-suggest source=model as |item|}}
  <h1>{{item}}</h1>
{{/auto-suggest}}

简单的实例

当然，你可以使用 {{yield name age occupa hobbies}} 生成任何变量，并在组件中捕获它们：

Of course, you can yield any variables using {{yield name age occupation hobbies}} and catch them in the component with:

{{#x-foo user=model as |name age occupation hobbies|}}
  Hi my name is {{name}}, I am {{age}} years old. Major of the times I am {{occupation}}, but also love to {{hobbies}}.
{{/x-foo}}

对于旧版本

您可以覆盖默认的 _yield 方法， Ember.Component ，并将上下文：get（parentView，'context'）更改为 context：get（view，'context'）。

You can override the default _yield method, of Ember.Component, and change the context: get(parentView, 'context') to context: get(view, 'context').

App.AutoSuggestComponent = Ember.Component.extend({
  _yield: function(context, options) {      
    var get = Ember.get, 
    view = options.data.view,
    parentView = this._parentView,
    template = get(this, 'template');

    if (template) {
      Ember.assert("A Component must have a parent view in order to yield.", parentView);      
      view.appendChild(Ember.View, {
        isVirtual: true,
        tagName: '',
        _contextView: parentView,
        template: template,
        context: get(view, 'context'), // the default is get(parentView, 'context'),
        controller: get(parentView, 'controller'),
        templateData: { keywords: parentView.cloneKeywords() }
      });
    }
  }
});

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