Custom Django 404 error

Question

I have a 404.html page, but in some cases I want to be able to send a json error message (for 404 and 500, etc.). I read the following page:

https://docs.djangoproje

Answer 1

Basics:

To define custom view for handling 404 errors, define in the URL config, a view for handler404, like handler404 = 'views.error404'

Apart from the basics, some things to note about (custom 404 views):

1. It will be enabled only in Debug=False mode.

2. And more ignored one, across most answers (and this this stuck my brains out).

   The 404 view defaults to

   django.views.defaults.page_not_found(request, exception, template_name='404.html')

   Notice the parameter exception

   This was causing a 404 to 500 redirect from within def get_exception_response(self, request, resolver, status_code, exception) function defined in core.handlers.base since it could not find the parameter exception