[BUG] Decorators on operations are ignored

[flaeppe]

Describe the bug

Any decorator added to an operation isn't run. Consider below, where I'd like my hello_world operation to respond with a set cookie header including a csrftoken cookie.

from django.views.decorators.csrf import ensure_csrf_cookie
from ninja import NinjaAPI

api = NinjaAPI()

@ensure_csrf_cookie
@api.get("/hello")
def hello_world(request):
    return "Hello world"

I'm fully aware of that in case process_view or process_response of the ensure_csrf_cookie decorator would've been triggered. I would have received a "Hello world" response (string) value from my operation and not a response object.

Although I'm more interested in how I would proceed to decorate any of my functions being decorated with an api_operation from django ninja. Where I'm able to intercept both the request and response object, just like a django middleware.

Versions (please complete the following information):

• Python version: 3.10
• Django version: 4.1
• Django-Ninja version: 0.19.1

[vitalik]

@flaeppe

the router decorator must be the very top one (as it does the final operation preparation and registration)

@api.get("/hello")
@ensure_csrf_cookie
def foo(request....

[flaeppe]

Yes, I noticed that in the end. But it also forces me to return a HttpResponse from foo.

The idea I had above was about returning e.g. a tuple from foo while still receiving the HttpResponse object (created by django ninja) in process response of ensure_csrf_cookie.

[c4ffein]

Just in case, I tried to upgrade the documentation in #906 , which may make it clearer how to use ensure_csrf_cookie