javascript - Backbone.js model.save 返回类型错误？

Question

我正在尝试在 Django 中实现如下所示的 backbone.js 模型:

class Booking(models.Model):
    date        = models.DateField('date booked')
    time        = models.TimeField('time booked')
    duration    = models.PositiveSmallIntegerField('duration booked') #x * 15
    user        = models.ForeignKey(User, related_name='bookings')
    room        = models.ForeignKey(Room, related_name='bookings')
    description = models.TextField()

它通过 TastyPie 的 RESTful 接口(interface)提供服务:/api/booking。我的主干模型是按照说明设置的 here :

window.Booking = Backbone.Model.extend({
url     :   function(){
                return this.get('resource_uri') || this.collection.url;
            },
urlRoot :   "/api/booking",
defaults:   {
                user    :   "/api/user/5" //defaults to nobodys
                }
});
window.Bookings = Backbone.Collection.extend({
url         :   BOOKING_API,
parse       :   function(data){
                return data.objects;
            }
});

现在尝试像这样在控制台中测试它:

var booking = new Booking({date : "2011-08-17", time: "12:45", duration: 30, room: "/api/room/1", description: "quickbook"});
booking.save();

上面的代码返回一个 TypeError。我看不出我做错了什么。

Answer 1

您没有定义 resource_uri 或将您的预订放入集合中。您看到的 TypeError 来自 this.collection.url。您会在执行 booking.collection.url 时看到同样的错误。像下面这样的东西应该可以解决问题。

var bookings = new Bookings;
bookings.add(booking);
booking.save();