I understand that we can use reverse()
in FBV and reverse_lazy()
in CBV. I understand that we have to use reverse_lazy()
in CBV as the urls are not loaded when the file is imported (Ref: Reverse_lazy and URL Loading?)
What I don't understand is:
How are the urls loaded when we call reverse
from the FBV? As when we import the views at the top of the urls.py
in a Django app, urlpatterns
list is yet to be evaluated. How does reverse()
for FBV work but not for CBV?
#importme.py
def a():
print("FUNCTION HELLO")
class B():
print("CLASS HELLO")
>>> import importme
>>> CLASS HELLO
Class attributes are evaluated on import. The answer to when or exactly how that happens, resides within the depths of python's import system.