"Undefined is not a function" 调用 Backbone 集合的提取函数时出错

Question

我在调用 fetch 函数时遇到错误。

Undefined is not a function Error in Backbone js

var models = Backbone.Model.extend({
  userId: function() {
    return this.get('userId');
  },
  id: function() {
    return this.get('id');
  },
  body: function() {
    return this.get('body');
  }
});
//Collections
var todolistStore = Backbone.Collection.extend({
  url: function() {
    return 'https://jsonplaceholder.typicode.com/posts'
  },
  model: models,
  parse: function(response) {
    return response;
  }
});
todolistStore.fetch();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://ajax.cdnjs.com/ajax/libs/underscore.js/1.1.4/underscore-min.js" type="text/javascript"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js" type="text/javascript"></script>

Answer 1

有几个问题。我正在建立@ChrisG 的答案。

您需要实例化一个集合。这是我的代码：

var Model = Backbone.Model.extend({
    userId: function() {
        return this.get('userId');
    },
    id: function() {
        return this.get('id');
    },
    body: function() {
        return this.get('body');
    }
});

//Collections
var TodoListStore = Backbone.Collection.extend({
    url: function() {
        return 'https://jsonplaceholder.typicode.com/posts'
    },
    model: Model,
    parse: function(response) {
        return response;
    }
});

var todolistStore = new TodoListStore();
todolistStore.fetch();

我更新了Underscore和Backbone
的版本
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.3.3/backbone-min.js

"Undefined is not a function" 调用 Backbone 集合的提取函数时出错

"Undefined is not a function" error when calling a Backbone collection's fetch function

javascript

backbone.js

backbone.js-collections