我有以下Knockout视图模型:
var myViewModel = {
courseData: ko.observable(null);
};
然后我从服务器收到以下数据:
var data = {
"courses": [
{
"srcCourses": [ { "code": "001", "name": "Course 1"}, { "code": "002", "name": "Course 2"} ],
"destCourse": { "code": "003", "name": "Course 3"}
},
{
"srcCourse": [ { "code": "004", "name": "Course 4"}, { "code": "005", "name": "Course 5"} ],
"destCourse": { "code": "006", "name": "Course 6"}
}
]
}
我通过Knockout映射插件运行到我的视图模型中,如下所示:
this.courseData(ko.mapping.fromJS(data));
这基本上让我看到了以下视图模型对象层次结构:
{
KnockoutObservable(this.courseData): {
KnockoutObservableArray(Courses): [
{
KnockoutObservableArray(srcCourses): [ ... ],
destCourse: { KnockoutObservable(code), KnockoutObservable(name) }
},
{
...
}
]
}
}
问题是“destCourse”对象仍然是一个对象,并且不会转换为observable(尽管destCourse对象中的每个属性都转换为observable)。
如何将所有子对象的数据转换为可观察的?理想情况下,以最通用的方式?
答案 0 :(得分:2)
我之前遇到过这种情况,我从来没有弄清楚为什么淘汰赛会对儿童物品做这件事。
无论如何,您只需要给映射器一些指导as described in the docs
var coursesMapping = {
"destCourse":{
create:function(options){
return ko.observable(ko.mapping.fromJS(options.data));
}
}
}
var mapped = ko.mapping.fromJS(data, coursesMapping);
这是一个片段:
var data = {
"courses": [
{
"srcCourses": [ { "code": "001", "name": "Course 1"}, { "code": "002", "name": "Course 2"} ],
"destCourse": { "code": "003", "name": "Course 3"}
},
{
"srcCourse": [ { "code": "004", "name": "Course 4"}, { "code": "005", "name": "Course 5"} ],
"destCourse": { "code": "006", "name": "Course 6"}
}
]
}
var coursesMapping = {
"destCourse":{
create:function(options){
return ko.observable(ko.mapping.fromJS(options.data));
}
}
}
var mapped = ko.mapping.fromJS(data,coursesMapping);
console.log(mapped.courses()[0].destCourse().name()); // "Course 3"
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout.mapping/2.4.1/knockout.mapping.js"></script>