是否有可能在映射过程中修改对象(缺少更好的术语)模式？我想是的,我似乎无法让它发挥作用.我正在尝试这样的事情：
var data = {
itemOne: 'someData',itemTwo: 'moreData'
}
var mapping = {
"newItem": {
create: function(options) {
return ko.observable(false);
}
}
};
ko.mapping.fromJS(data,mapping,_model.observableArrayPart);
解决方法
下面的示例演示了如何自定义阵列的创建方式以及为其定义键,以便您可以使用映射插件应用更新：
http://jsfiddle.net/rniemeyer/LHeQZ/
var data = [
{ id: 1,first: "Bob",last: "Smith" },{ id: 2,first: "Jim",last: "Jones" },{ id: 3,first: "Delete",last: "Me" }
];
var updatedData = [
{ id: 1,first: "Robert",first: "James",{ id: 4,first: "New",last: "Guy" }
];
var Person = function(data) {
this.id = data.id;
this.first = ko.observable(data.first);
this.last = ko.observable(data.last);
this.full = ko.computed(function() {
return this.first() + " " + this.last();
},this);
};
var dataMappingOptions = {
key: function(data) {
return data.id;
},create: function(options) {
return new Person(options.data);
}
};
var viewmodel = {
people: ko.mapping.fromJS([]),loadInitialData: function() {
ko.mapping.fromJS(data,dataMappingOptions,viewmodel.people);
},loadUpdatedData: function() {
ko.mapping.fromJS(updatedData,viewmodel.people);
}
};
ko.applyBindings(viewmodel);
