我正在尝试加载一个简单的视图模型,它有两个模型,Profile是ko.observable()和requests,它是一个ko.observableArray() .
当我应用绑定然后尝试绑定到ether profile.field或foreach:requests时,我没有输出,没有javascript或绑定错误 . 但是当我转出ko.toJSON(self.profile)或ko.toJSON(self.requests)时,我实际上得到了数据,它只是没有约束力,我不知道为什么,任何想法我正在做什么错误 .
这是我的模特
var Profile = function(profile) {
var self = this;
self.id = ko.observable(profile.id);
self.user_id = ko.observable(profile.user_id);
self.first_name = ko.observable(profile.first_name);
self.last_name = ko.observable(profile.last_name);
self.age = ko.observable(profile.age);
self.email = ko.observable(profile.email);
self.area = ko.observable(profile.area);
self.favorite_restaurant = ko.observable(profile.favorite_restaurant);
self.avatar = ko.observable(profile.avatar);
self.on_mailing_list = ko.observable(profile.on_mailing_list);
}
var Request = function(request) {
var self = this;
self.id = ko.observable(request.id);
self.user_id = ko.observable(request.user_id);
self.title = ko.observable(request.title);
self.participants = ko.observable(request.participants);
self.food_type = ko.observable(request.food_type);
self.event_date = ko.observable(request.event_date);
self.time_of_day = ko.observable(request.time_of_day);
self.area = ko.observable(request.area);
self.description = ko.observable(request.description);
self.status = ko.observable(request.status);
}
这是我的ViewModel
var MasterViewModel = function() {
var self = this;
self.profile = ko.observable();
self.requests = ko.observableArray();
self.notifications = ko.observableArray();
// load the users profile
$.getJSON('/profiles/load', {}, function(profile) {
self.profile = new Profile(ko.toJS(profile));
console.log(ko.toJSON(self.profile));
// load the users requests
$.getJSON('/request/load', {}, function(requests){
var mappedRequests = $.map(requests, function(request) {
return new Request(request);
});
self.requests = mappedRequests;
console.log(ko.toJSON(self.requests));
});
});
}
这是我试图应用的简单绑定
<h2 data-bind="text: profile.first_name"></h2>
<ul data-bind="foreach: requests">
<li data-bind="text: title"></li>
</ul>
当然,我正在准备文件中应用淘汰赛绑定
<script>
$(document).ready(function() {
// bind the ViewModel
ko.applyBindings(new MasterViewModel());
});
</script>
2 回答
您应该设置observable不使用新值覆盖它们 .
你写了 :
你应该这样写:
为什么?因为这样,ko知道配置文件已更改,并且必须刷新视图 .
同样的问题:
应该是:
你需要更新observables的值而不是它的引用 . 您还需要将配置文件值作为函数访问
检查这个小提琴http://jsfiddle.net/victorrseloy/qFnUC/1/
HTML: