Using Django ajax doesn't function properly when it's in a separate file

My Django site utilizes AJAX to handle requests. Initially, I had the JavaScript code embedded within the HTML document using <script>...</script>, which worked perfectly fine. However, when I decided to move the JavaScript to a separate file, everything still functioned correctly except for the AJAX calls. Every time an AJAX request was made, I consistently received a 404 (Not Found) error pointing to the exact line in the document where the AJAX process began. My URL patterns are structured as follows:

url(r'^(?P<letnik_id>[1-4])/(?P<classes_id>[A-G])/(?P<subject_id>[\w\-]+)/dodaj$', views.create_exam, name="create_exam"),

Within the views:

def create_exam(request, letnik_id, classes_id, subject_id):
...

The AJAX call is crafted like this:

$.ajax({
    url: "{% url 'create_exam' letnik_id=letnik_id classes_id=classes_id subject_id=subject_id %}",
...

I suspect that perhaps the

{% url 'create_exam' letnik_id=letnik_id classes_id=classes_id subject_id=subject_id %}
syntax does not function properly in a separate file. Is there an alternative method to reference the URL in this scenario? What could be causing this issue?

Answer №1

You have provided a solution to your own question by mentioning that a django template tag will not function in a separate JS file, as it is designed to work only on templates rendered by a Django view. It seems like you may need to explore alternative methods for achieving your desired outcome.

One suggestion could be to define a global JavaScript variable within the template containing the URL, and then utilize this variable in your JS file. While I am uncertain if this is the optimal approach, it could potentially resolve the issue at hand.

Prior to importing the JS file and declaring the variable in your HTML document, consider the following:

MY_URL = "{% url 'create_exam' letnik_id=letnik_id classes_id=classes_id subject_id=subject_id %}";
<script src="myscripts.js"></script>

Answer №2

Issue at hand:

You are attempting to utilize a Django Template tag ({% url ... %}) outside of its intended usage within a template.

Solution:

To resolve this, consider outputting data into your HTML and linking it to the window object in the browser

<script>
window.page_data = {
  someUrl: {% url ... %}
};
</script>

Subsequently, employ other scripts by retrieving the data from the window...

$.ajax(window.page_data.someUrl)

Alternatively, you can incorporate the URL directly into the markup using a data attribute

<div data-url="{% url ... %}">

Then extract this information from the element using Javascript.

As the complexity of your project increases, ensure that your API conveys the necessary data for each resource action. Avoid tightly coupling your client with your server unnecessarily. Refrain from hard coding URLs as they may change, leading to unforeseen issues. If any hard coding is unavoidable, centralize it and make note to address it accordingly in the future.

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