Question

这是我使用knockout.js的第一个项目，我遇到了一个无法解决的问题。我试图让foreach绑定3级深度。前两个级别有效，但第三个级别没有。我的HTML或JavaScript都没有看错。

<div class="skill-list-body">
    <div class="inner-skill-list-body">
        <div class="skill-list-publication-title" data-bind="text: publication"></div>
        <div data-bind="foreach: { data: categories, as: 'category' }">            
            <div>
                <div class="skill-list-category-title" data-bind="text: category.name"></div>
                <div class="category-container" data-bind="foreach: { data: realms, as: 'realm' } ">
                    <div class="realm-skill-box">
                        <div class="skill-list-realm-heading" data-bind="text: name">
                           <div data-bind="foreach: { data: skills, as: 'skill' }">
                                <div data-bind="text: skill.name"></div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>            
        </div>
    </div>
</div>

的JavaScript

var viewModel = {
    publication: 'Medieval Fantasy Skills',
    categories: ko.observableArray([
            {
            name: 'Physical & Social Combat Skills',
            realms: ko.observableArray([
                    {
                        name: 'The Realm of Combat Tactics Skills',
                        skills: ko.observableArray([
                                { name: 'Craft Profession', id: 0 }
                            ])
                    }
                ])
            }
        ])
};

ko.applyBindings(viewModel);

Answer 1

您需要关闭名称div标签以打开foreachthe binding -

http://jsfiddle.net/a3L60L4h/

<div class="skill-list-realm-heading" data-bind="text: name">
</div>
<div data-bind="foreach: { data: skills, as: 'skill' }">
     <div data-bind="text: skill.name"></div>
</div>

这是因为名称绑定会覆盖包含foreach循环的innerHtml

Answer 2

这就是问题所在：

<div class="skill-list-realm-heading" data-bind="text: name">
<div data-bind="foreach: { data: skills, as: 'skill' },   ">
    <div data-bind="text: skill.name"></div>
</div>
</div>

您的外部name绑定有效地清除了节点的内容。让技能成为节点的兄弟，而不是孩子。

<div class="skill-list-realm-heading" data-bind="text: name"></div>
<div data-bind="foreach: { data: skills, as: 'skill' },   ">
    <div data-bind="text: skill.name"></div>
</div>

Knockoutjs预示第三个嵌套级别不起作用

2 个答案: