如何使用基因剔除映射插件添加新项目 [英] how to add new item using knockout mapping plugin

问题描述

我正在尝试敲除映射样本，并认为我快要准备好了.我似乎无法在viewModel.foos中添加新的Foo-有人可以看到我在这里错过的内容吗?

I'm trying out a knockout mapping sample and think I'm almost there. I don't seem able to add a new Foo to the viewModel.foos - can anyone see what I've missed here?

var Foo = function (data) {

    var self = this;
    self.id = data.id;
    self.Name = ko.observable(data.Name);

}

var dataMappingOptions = {
    key: function(data) {
        return data.id;        
    },
    create: function (options) {

        return new Foo(options.data);
    }
};


var viewModel = {

    foos: ko.mapping.fromJS([]),
    loadInitialData: function () {
        ko.mapping.fromJS(serverData, dataMappingOptions, viewModel.foos);
    },
    loadUpdatedData: function () {
        ko.mapping.fromJS(serverData, dataMappingOptions, viewModel.foos);
    }
};

viewModel.addFoo = function () {
    viewModel.foos.push(ko.mapping.fromJS(new Foo()));
    viewModel.loadUpdatedData();
}


    <ul data-bind="template: {name: 'TopTemplate'}"></ul>
<script type="text/html" id="TopTemplate">
    <li><span>Result</span>
        <ul data-bind=" template: {name:  'FooTemplate' , foreach: foos} " style="list-style-type:circle;margin-left:15px">
        </ul>
    </li>
    <button data-bind='click: addFoo'>Add Foo</button>
</script>       
<script type="text/html" id="FooTemplate">     
    <li><span data-bind='text: Name'></span>

    </li>

</script>

推荐答案

您可以直接将新的Foo推送到observableArray.

You can just push a new Foo to your observableArray directly.

这里是加载一些初始数据，然后加载一些更新的数据以及在客户端添加新项的按钮的示例. http://jsfiddle.net/rniemeyer/wRwc4/

Here is a sample of loading some initial data and then loading some updated data along with a button to add new items on the client side. http://jsfiddle.net/rniemeyer/wRwc4/

var viewModel = {
    foos: ko.mapping.fromJS([]),
    loadInitialData: function() {
        ko.mapping.fromJS(initialData, dataMappingOptions, viewModel.foos);
    },
    loadUpdatedData: function() {
        ko.mapping.fromJS(updatedData, viewModel.foos);
    }
};

viewModel.addFoo = function() {
    viewModel.foos.push(new Foo({ id: 0, Name: "New" }));
};

这篇关于如何使用基因剔除映射插件添加新项目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！