Javascript 使用自定义敲除映射时获取索引值
我正在设置一个击倒视图模型,如下所示:Javascript 使用自定义敲除映射时获取索引值,javascript,knockout.js,Javascript,Knockout.js,我正在设置一个击倒视图模型,如下所示: var Schedule = function(data, parent) { var self = this; ko.mapping.fromJS(data, {}, self); self.foo = 'bar'; ... }; var ScheduleViewModelMapping = { 'schedules': { create: function(options) {
var Schedule = function(data, parent) {
var self = this;
ko.mapping.fromJS(data, {}, self);
self.foo = 'bar';
...
};
var ScheduleViewModelMapping = {
'schedules': {
create: function(options) {
return new Schedule(options.data, options.parent);
}
}
};
ko.mapping.fromJS(data, ScheduleViewModelMapping, self);
$(document).ready(function() {
var ViewModel = new ScheduleViewModel;
ko.applyBindings(ViewModel);
});
Schedules是一个数组,我希望能够在某处获取当前计划的索引,以便能够将其与options.data和options.parent一起传递给schedule对象。我建议更改映射处理程序,以便它可以存储某些状态:
var ScheduleViewModelMapping = new (function(){
var counter = 0;
this.schedules = {
create: function(options) {
//use counter as index as required
var s = new Schedule(options.data, options.parent);
counter++;
return s;
}
}
this.resetCounter = function() {
counter = 0;
}
})();
ScheduleViewModelMapping.resetCounter();
ko.mapping.fromJS(data, ScheduleViewModelMapping, self);