id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
29664	Need Proper error handling for CBV in urls.	Amar	emiamar@…	"When in urls.py if one misses to call `as_view()`  (Example shown below) method django throws weird error.  Need better way of handling error 

Incorrect definition
{{{
urlpatterns = [
    path('admin/', admin.site.urls),
    path('hello/', HelloView)
]
}}}

Correct definition
{{{
urlpatterns = [
    path('admin/', admin.site.urls),
    path('hello/', HelloView.as_view())
]
}}}

Error

{{{
TypeError at /hello/

__init__() takes 1 positional argument but 2 were given

Request Method: 	GET
Request URL: 	http://localhost:8000/hello/
Django Version: 	2.0.7
Exception Type: 	TypeError
Exception Value: 	

__init__() takes 1 positional argument but 2 were given

Exception Location: 	/home/amar/.virtualenvs/djmongo/lib/python3.6/site-packages/django/core/handlers/base.py in _get_response, line 126
}}}


This make it really  hard to figure out actual error. I faced this once and had to struggle for hours to understand what went wrong. Here is my [https://github.com/django/django/pull/10294 PR]

"	Cleanup/optimization	closed	Core (URLs)	2.1	Normal	wontfix		emiamar@…	Unreviewed	0	0	0	0	0	0