Django: Catching Integrity Error and showing a customized message using template

Question

In my django powered app there is only one obvious case where \"IntegrityError\" can arise.
So, how can I catch that error and display a message using templates?

Answer 1

Simplest solution: write a middleware implementing process_exception that only catches IntegrityError and returns an HttpResponse with your rendered template, and make sure this middleware is after the default error handling middleware so it is called before (cf https://docs.djangoproject.com/en/dev/topics/http/middleware/#process-exception for more).

Now if I was you, I wouldn't assume such a thing as "there is only one obvious case where "IntegrityError" can arise", so I strongly recommand you do log the exception (and send email alerts) in your middleware.