这里我正在研究使用Knockout sortable的代码。它应该显示深度为3级以上的嵌套排序。
数据传递给模板,但是一些元素在被删除后返回到原始位置(例如 A,B元素位于最高级别)。
我应该如何配置嵌套排序,以便在没有错误的情况下也可以使用最高级别?
错误:
knockout-sortable.js:244 Uncaught TypeError:sourceParent.splice不是函数
或
knockout-sortable.js:252 Uncaught TypeError:targetParent.splice不是函数
JSFiddle - Similar working example
var viewModel = function() {
var self = this;
self.children = ko.observable([{
"name": "A",
"children": [{
"name": "A1",
"children": [{
"name": "A11"
}, {
"name": "A12"
}]
}, {
"name": "A2"
}]
}, {
"name": "B",
"children": [{
"name": "B1"
}, {
"name": "B2"
}]
}]);
}
ko.applyBindings(new viewModel());
ul {
border: solid 1px green;
list-style-type: none;
margin:0px;
}
li {
padding: 10px;
border: solid 1px blue;
margin:0px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<script src="https://rawgithub.com/rniemeyer/knockout-sortable/master/build/knockout-sortable.js"></script>
<script id="nodeTmpl" type="text/html">
<li>
<!-- ko if: $data.name -->
<a href="#" data-bind="text: $data.name"></a>
<!-- /ko -->
<!-- ko if: $data.children -->
<ul data-bind="sortable: { template: 'nodeTmpl', data: $data.children }"></ul>
<!-- /ko -->
</li>
</script>
<ul data-bind="sortable: { template: 'nodeTmpl', data: $root.children }"></ul>
答案 0 :(得分:1)
Peter Gerhat提供的解决方案不正确。 问题在于使用了observable数组,而不是observableArray。
错误表明sourceParent
(从中拖动元素的viewmodel上的集合)没有splice
函数。哪个是正确的,一个observable没有splice
函数,而array
或observableArray
就是targetParent
函数。这同样适用于observable
(这是拖动元素的viewmodel上的集合)。
要使初始样本有效,所有需要做的就是将observableArray
更改为array
。
但是,正如您将在原始示例和Peter Gerhat提供的解决方案中注意到的那样,即使没有抛出任何错误,它仍然无法正常工作。您会注意到,当您拖动元素时,要么根本不移动,要么消失。
此处的解决方案是将每个observableArray
变为sortable
,以便var viewModel = function() {
var self = this;
self.children = ko.observableArray([{
"name": "A",
"children": ko.observableArray([{
"name": "A1",
"children": ko.observableArray([{
"name": "A11"
}, {
"name": "A12"
}])
}, {
"name": "A2"
}])
}, {
"name": "B",
"children": ko.observableArray([{
"name": "B1"
}, {
"name": "B2"
}])
}]);
}
ko.applyBindings(new viewModel());
- 绑定更新它们。
ul {
border: solid 1px green;
list-style-type: none;
margin: 0px;
}
li {
padding: 10px;
border: solid 1px blue;
margin: 0px;
}
&#13;
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.2.0/knockout-min.js"></script>
<script src="https://rawgithub.com/rniemeyer/knockout-sortable/master/build/knockout-sortable.js"></script>
<script id="nodeTmpl" type="text/html">
<li>
<!-- ko if: $data.name -->
<a href="#" data-bind="text: $data.name"></a>
<!-- /ko -->
<!-- ko if: $data.children -->
<ul data-bind="sortable: { template: 'nodeTmpl', data: $data.children }"></ul>
<!-- /ko -->
</li>
</script>
<ul data-bind="sortable: { template: 'nodeTmpl', data: $root.children }"></ul>
&#13;
this.http
.get(url)
.map((res: Response) => {
return res.json().map((obj: Type) => {
return Object.assign(new Type(), obj);
});
})
// And so on
&#13;
答案 1 :(得分:-1)
通过对行<ul data-bind="template: { name: 'nodeTmpl', data: $root }"></ul>
进行更改并从某些引用中删除$data
来解决问题,因为它导致了错误。
var viewModel = function() {
var self = this;
self.children = [{
"name": "A",
"children": [{
"name": "A1",
"children": [{
"name": "A11",
}, {
"name": "A12",
}]
}, {
"name": "A2",
}]
}, {
"name": "B",
"children": [{
"name": "B1",
}, {
"name": "B2",
}]
}]
};
ko.applyBindings(new viewModel());
&#13;
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/2.2.1/knockout-min.js"></script>
<script src="https://rawgithub.com/rniemeyer/knockout-sortable/master/build/knockout-sortable.js"></script>
<script id="nodeTmpl" type="text/html">
<li>
<!-- ko if: $data.name -->
<a href="#" data-bind="text: name"></a>
<!-- /ko -->
<!-- ko if: $data.children -->
<ul data-bind="sortable: { template: 'nodeTmpl', data: children }"></ul>
<!-- /ko -->
</li>
</script>
<ul data-bind="template: { name: 'nodeTmpl', data: $root }"></ul>
&#13;