Custom exception handling

[jensneuhaus]

☝️What is it? Why do we need it?

django-rest-framework works great but the exception handling is not as good because it mixes HTML responses (e.g. 404 or 500) with JSON responses

For the API the format should be consistent:

{
   "message" : "This is a user message, we might show to the User"
   "error_code": "PASSWORD_TOO_INSECURE"
}

Please write a custom exception handler which we can use in all kind of projects, documentation on this is here: https://www.django-rest-framework.org/api-guide/exceptions/#custom-exception-handling

📋 Todos

• [ ] Read into my former (quick & dirty) solution: https://gist.github.com/jensneuhaus/f86ed013ff86292de0c8cd7dfb33185a - I am happy if you have a better version of it
• [ ] Have a new custom exception service, which can e.g.
  • [ ] Only gives out JSON
  • [ ] Gives valid Status code responses, e.g. 400 on User errors; 500 on unknown errors, 404 on missing objects, 422 for potential Developer-errors and so on
  • [ ] Translate Django own HTML responses (e.g. for 500) into correct JSON
• [ ] Implement the custom_exception_handler also in the emails project and make sure, all errors from the API come correctly