backbone.js - getting Backbone collection size? -

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मेरे पास एक बैकबोन संग्रह है 

  var users = backbone.collection.extend ({ Url: 'https: // localhost: 2222 / उपयोगकर्ता', मॉडल: उपयोगकर्ता});

नियंत्रक में मुझे उपयोगकर्ताओं की संख्या प्राप्त करने की आवश्यकता नहीं है। 

  var usersList = नए उपयोगकर्ता (); UsersList .fetch ({से पहले: सामान्य यूटीएसएंडएडिट एटिफिकेशन, डेटा: $ .परम ({समूह: समूह.आईडी}}});

मैंने उपयोगकर्ताओं की कोशिश की है। लांट यह लाता है 0 लेकिन कंसोल 'usersList' में कुछ डेटा दिखाता है

मैंने लॉग इन किया 

  console.log (usersList); console.log (usersList.length); 'बच्चे' वस्तु लंबाई में 0 के रूप में दिखाया जाता है, लेकिन उस लंबाई के अंदर 4 है।   
 
 
 क्या आप सुनिश्चित हैं कि आप  लाने के  के आने के बाद लंबाई की गिनती कर रहे हैं? याद रखें कि आकर्षित करने में कुछ समय लगता है और आपका जावास्क्रिप्ट इसके लिए इंतजार नहीं करेगा।

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