选择带有 ember 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

但选择视图需要在 each 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.

这是视图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 有效:

<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，则不会触发更改事件(这是有道理的)

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>

所以我猜选择必须包含在视图中..在这种情况下我如何传递相关对象?...这段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

Ember 现在有一个内置的选择视图.

Ember now has a built-in Select view.

这是一个用法示例:

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"}}

同样，这是一个 jsFiddle 示例:http://jsfiddle.net/ebryn/zgLCr/

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

这篇关于选择带有 ember 的下拉菜单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！