我正在尝试使用敲除映射,但它并没有像我预期的那样工作。在这里,我创造了我能做的最简单的小提琴,但它不起作用。
我是不是错过了什么?
https://jsfiddle.net/p48d11j5/1/
function Model(){
var self = this;
self.Id = ko.observable(0);
self.Name = ko.observable("Default");
self.Visible = ko.observable(false);
self.Items = ko.observableArray([]);
}
function ModelItem(){
var self = this;
self.Id = ko.observable(0);
self.Name = ko.observable("Default item name")
}
var m = new Model();
ko.mapping.fromJS({
Id:1,
Name: "Test",
Visible: true,
Items: [
{
Id:1,
Name:"First"
},
{
Id:2,
Name:"Second"
}
]
}, m);
ko.applyBindings(m);
edit:我使用嵌套数组,所以我添加了数组
edit2:我想让模型"类型化"以使用函数或ko.计算它们的属性
如果用两个参数调用ko.mapping.fromJS
:ko.mapping.fromJS(data, mappedObject)
,则第二个参数是已经创建的mappedObject
。然后,第二个参数将被视为viewModel
,而不是options
。
你所要做的就是:ko.mapping.fromJS(data,{},viewModel)-这一步将你的数据放入你的模型中。
ko.mapping.fromJS({
Id:1,
Name: "Test",
Visible: true,
Items: [{Id: 1, Name: "First"}, {Id: 2, Name: "Second"}]
}, {} ,m); // pass the second argument as an empty object.
试试这个
var m = ko.mapping.fromJS({
Id:1,
Name: "Test",
Visible: true,
Items: [
{
Id:1,
Name:"First"
},
{
Id:2,
Name:"Second"
}
]
}, new Model());
ko.applyBindings(m);
工作示例:https://jsfiddle.net/p48d11j5/2/
您可以尝试这样的操作,使用映射插件设置默认状态并应用更新:
// Set up the initial model.
var model = ko.mapping.fromJS({
Id: 0,
Name: "Default",
Visible: false,
Items: []
});
ko.applyBindings(model);
// Map new data from the "server"...
var model = ko.mapping.fromJS({
Id:1,
Name: "Test",
Visible: true,
Items: [
{
Id:1,
Name:"First"
},
{
Id:2,
Name:"Second"
}
]
}, model);
// ...or directly manipulate the model.
model.Id(2);
model.Items.push({Id: 3, Name: "Third"});
https://jsfiddle.net/3evtx022/