Simulation of back-end fetch for backbone model

I am facing an issue with fetching a model using model.fetch();. The model's urlRoot is set to "/backend/item" in my application, but currently I do not have access to the back-end environment. To work around this, I decided to mock the results by adding a route in my router:

"backend/item/:id": "data_getItem"

and defining a function:

data_getItem: function(id) {
  console.log("data_getItem: "+ id);
  return {
    animals: [
      {
        name: 'flying cat',
        type: 'none'
      }
    ]
  };
}

However, when I run the application, I can see an ajax call being made to "http://127.0.0.1:8000/backend/item/1", but the console is empty and I receive an error (the fetch function redirects me to the error callback). I'm wondering why this is happening and how I can successfully mock the back-end data.

EDIT @rjz provided some help on achieving what I want to do, but I am curious if an ajax call can be intercepted by Backbone router. My intuition suggests that it might not be possible because ajax calls cannot execute client-side Backbone code, making the concept of router irrelevant in this scenario. Am I correct?..

Answer №1

If you are looking to simulate backend functionality in your project, using a Backbone.Router to catch AJAX calls may not be the best approach. Instead, consider utilizing a testing framework for this purpose. One option is to use:

For more elaborate unit testing scenarios, you might want to explore tools like Jasmine and its AJAX mocking capabilities available through Jasmine-AJAX library.

Regarding intercepting AJAX calls with Backbone.Router:

To answer your question directly, a Backbone.Router is unable to intercept AJAX calls.

The reason behind this limitation lies in how the router functions - by responding to URL-related events such as hashchange or popstate (when using pushState). As AJAX calls do not manipulate the URL directly, they essentially bypass the mechanisms employed by the router.

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