调用Backbone集合的获取函数时出现“未定义不是函数”错误

Z时代
2024-01-10
分类：问答

我在调用fetch函数时出现错误。调用Backbone集合的获取函数时出现“未定义不是函数”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>

回答：

有几个问题。我正在建立@ChrisG的答案。

您需要实例化一个集合。下面是我的代码：

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();

我更新下划线的版本和骨干
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