选择带有余烬的下拉菜单 [英] select dropdown with ember

问题描述

我正在尝试生成一个选择输入，并将所选对象传递给视图上的更改事件。 ember联系人示例使用< ul> ，但选择该视图需要在每个视图之外，否则更改甚至不会被触发。

I'm trying to produce a select input and pass the selected object to the change event on the view. The ember contact example uses a <ul> but with a select the view needs to be outside the each otherwise the change even isn't fired.

这里是查看js：

App.SelectView = Ember.View.extend({

    change: function(e) {
        //event for select
        var content = this.get('content');
        console.log(content);   

        App.selectedWidgetController.set('content', [content]);
    },
    click: function(e) {
        //event for ul
        var content = this.get('content');
        console.log(content);   

        App.selectedWidgetController.set('content', [content]);
    }
});

示例中的 ul / p>

The ul from the example works:

<ul>
    {{#each App.widgetController.content}}
        {{#view App.SelectView contentBinding="this"}}
            <li>{{content.name}}</li>
        {{/view}}
    {{/each}}
</ul>

但是，如果我直接替换html，更改事件不会被触发（这是有道理的） p>

But if I replace html directly, the change event isn't fired (which makes sense)

<select>
    {{#each App.widgetController.content}}
        {{#view App.SelectView contentBinding="this"}}
            <option>{{content.name}}</option>
        {{/view}}
    {{/each}}
</select>

所以我猜想选择必须被包装在视图中..在这种情况下我如何通过相关对象？...此代码导致整个数组被传递：

So I guess the select has to be wrapped in the view.. in which case how do I pass the relevant object?... This code results in the entire array being passed:

{{#view App.select_view contentBinding="App.widgetController.content"}}
    <select>
    {{#each App.widgetController.content}}
        <option>{{name}}</option>
    {{/each}}
    </select>
{{/view}}

推荐答案

现在有一个内置的选择视图。

Ember now has a built-in Select view.

这是一个使用示例：

var App = Ember.Application.create();

App.Person = Ember.Object.extend({
    id: null,
    firstName: null,
    lastName: null,

    fullName: function() {
        return this.get('firstName') + " " + this.get('lastName');
    }.property('firstName', 'lastName').cacheable()
});

App.selectedPersonController = Ember.Object.create({
    person: null
});

App.peopleController = Ember.ArrayController.create({
    content: [
        App.Person.create({id: 1, firstName: 'Yehuda', lastName: 'Katz'}),
        App.Person.create({id: 2, firstName: 'Tom', lastName: 'Dale'}),
        App.Person.create({id: 3, firstName: 'Peter', lastName: 'Wagenet'}),
        App.Person.create({id: 4, firstName: 'Erik', lastName: 'Bryn'})
    ]
});

您的模板将如下所示：

{{view Ember.Select
       contentBinding="App.peopleController"
       selectionBinding="App.selectedPersonController.person"
       optionLabelPath="content.fullName"
       optionValuePath="content.id"}}

再次，这里是一个jsFiddle示例： a href =http://jsfiddle.net/ebryn/zgLCr/> http://jsfiddle.net/ebryn/zgLCr/

Again, here's a jsFiddle example: http://jsfiddle.net/ebryn/zgLCr/

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