backbone.js - 未定義不是函數

Question

我已經開始學習Backbone.js並試圖用Collections來編寫我的第一個應用程序。下面是代碼：

console.clear(); 
(function($){ 

    window.App = { 

     Models : {}, 
     Collections : {}, 
     Views : {} 

    }; 



    //a single estimate 
    App.Models.Estimate = Backbone.Model.extend({}); 

    // multiple esitmates 
    App.Collections.Estimates = Backbone.Collection.extend({ 


     model : App.Collections.Estimate 


    }); 


    App.Views.Estimates = Backbone.View.extend({ 
     tagName: 'ul', 


     render : function(){ 

     this.collection.each(this.addTo,this); 

    }, 
     addTo:function(estimate){ 

     var dir = App.Views.Estimate({model:estimate}).render(); 
     this.$el.append(dir.el); 

     } 





    }); 


    App.Views.Estimate = Backbone.View.extend({ 
     tagName: 'li', 


     render :function(){ 

     this.$el.html(this.model.get('title')); 
     return this; 
     } 


    }); 



    var jSon = [{title:'Abhiram', estimate:8}]; 
    var estimates = new App.Collections.Estimates(jSon); 
    console.log(estimates); 

    var tasksView = new App.Views.Estimates({collection:estimates}); 
    // var a = tasksView.render().el; 
    //console.log(a); 

})($j||jQuery); 

我所有三個包括：

jQuery的第一個，下一個下劃線和骨幹。我一直得到「未定義不是函數」。請讓我知道如果我做錯了什麼。

謝謝！

Answer 1

您確定要將集合App.Collections.Estimate作爲模型指定給它嗎？

// multiple esitmates 
App.Collections.Estimates = Backbone.Collection.extend({ 
    model : App.Collections.Estimate 
});