Who generates the default page of django welcome page?

Question

I just set up the django environment and as the tutorial said. I typed python manager.py runserver and it told me to open 127.0.0.1:8000. When I open it, it worked with the correct welcome page.

But here is my question: who generates this default welcome page? Since there is no views.py and the urls.py page is empty.

Answer 1

If anyone would like to have it back (or reuse it), you just need to add debug.default_urlconf view to your urls:

…
from django.views import debug
…

urlpatterns = [
    …
    path('', debug.default_urlconf),
    …
]

Answer 2

If your urls.py is empty (as in contains no patterns to match urls) and Django is in debug mode (DEBUG = True in your settings) then Django fires back the page you're seeing.

The Django view:

https://github.com/django/django/blob/main/django/views/debug.py#L575-L583

The HTML template:

https://github.com/django/django/blob/ca9872905559026af82000e46cde6f7dedc897b6/django/views/templates/default_urlconf.html