我正在尝试使用 Backbone Relational 设置一对模型,但我不明白删除事件是如何触发的。
这是我的模型代码:
var Car = Backbone.RelationalModel.extend({
idAttribute: "id"
});
var Cars = Backbone.Collection.extend({
model: Car
});
var CarCollection = new Cars();
var User = Backbone.RelationalModel.extend({
idAttribute: 'id',
relations: [{
type: Backbone.HasMany,
key: 'model',
relatedModel: Car,
collectionType: Cars,
includeInJSON: 'model',
reverseRelation: {
key: 'ownedBy',
includeinJSON: 'name'
}
}]
});
var Users = Backbone.Collection.extend({
model: User
});
var UserCollection = new Users();
//Bootstrap data and put it in the collections
var carsData = [
{id:1, model:'500',ownedBy:1},
{id:2, model:'Corsa',ownedBy:2},
{id:3, model:'Civic',ownedBy:2}
];
var usersData = [
{id:1,name:'Dude'},
{id:2,name:'Mark'}
];
CarCollection.add(carsData);
UserCollection.add(usersData);
在 JSON 中,我得到的是:
UserCollection = {"id":1,"name":"Dude","model":["500"]}{"id":2,"name":"Mark","model":["Corsa","Civic"]}
CarCollection = {"id":1,"model":"500","ownedBy":"Dude"}{"id":2,"model":"Corsa","ownedBy":"Mark"}{"id":3,"model":"Civic","ownedBy":"Mark"}
现在,如果我像这样向 CarCollection 添加一个元素:
CarCollection.add({id:4,model:'Prius',ownedBy:1};);
'add' 事件被触发,但如果我从集合中删除一个元素:
var el = CarCollection.get(1);
CarCollection.remove(el);
没有事件被触发。
我已经通过一些解决方法解决了它,例如:
var el = CarCollection.get(1);
el.destroy();
或者直接在 Backbone.store 中取消注册:
Backbone.Relational.store.unregister(el);
或者只是将ownedBy设置为null:
var el = CarCollection.get(1);
el.set("ownedBy",null);
这是插件的正确行为吗?或者我以错误的方式配置了我的模型?感谢您的每一个答案。