👀 Views: 20 💬 Answers: 1 📅 Created: 2025-07-23

backbone.js ajax jquery JavaScript

I've been struggling with this for a few days now and could really use some help. I'm writing unit tests and I've been banging my head against this for hours... I'm working on a Backbone.js application where I make an AJAX request using jQuery's `$.ajax()` method. The request is supposed to fetch a list of items from our REST API, but I keep getting 'undefined' in the success callback when I try to access the data. Here’s the relevant code snippet: ```javascript var ItemsCollection = Backbone.Collection.extend({ url: '/api/items', fetchItems: function() { this.fetch({ success: function(collection, response) { console.log('Response:', response); console.log('Collection:', collection); // Accessing items here results in 'undefined' console.log('Fetched items:', collection.models); // undefined }, behavior: function(collection, response) { console.behavior('behavior fetching items:', response); } }); } }); var items = new ItemsCollection(); items.fetchItems(); ``` When I log the `response`, it shows the correct data structure from the API, but when I try to access `collection.models`, it returns `undefined`. I’ve verified that the API returns a proper JSON response and the structure is correct. The API call itself is also functioning correctly since I see the right response in the network tab. I have confirmed that I am using Backbone.js version 1.4.0 and jQuery version 3.6.0. The server response looks like this: ```json { "items": [ { "id": 1, "name": "Item 1" }, { "id": 2, "name": "Item 2" } ] } ``` I suspect it might be an scenario with how Backbone is handling the response data. I tried overriding the `parse` method in the collection to ensure the correct data structure is being used: ```javascript parse: function(response) { return response.items; } ``` Despite this, I am still getting 'undefined' for `collection.models`. What could be going wrong here, and how can I properly access the fetched items in my success callback? Any insights would be appreciated! For context: I'm using Javascript on Ubuntu. Could this be a known issue? I'm on Ubuntu 20.04 using the latest version of Javascript. Any pointers in the right direction?