When run the django.core.urlresolvers.resolve ( '/') to the @api_view decorated function, ResolverMatch.func_name has been set a invalid dotted name

[TakesxiSximada]

Checklist

• I have verified that that issue exists against the master branch of Django REST framework.
• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• This is not a usage question. (Those should be directed to the discussion group instead.)
• This cannot be dealt with as a third party library. (We prefer new functionality to be in the form of third party libraries where possible.)
• I have reduced the issue to the simplest possible case.
• I have included a failing test as a pull request. (If you are unable to do so we can still accept the issue.)

Steps to reproduce

When run the django.core.urlresolvers.resolve ( '/') to the @api_view decorated function, ResolverMatch.func_name has been set a invalid dotted name.

This is example code.

proj/urls.py::

from django.conf.urls import url

from . import views


urlpatterns = [
    url(r'^', views.test_view),
]

proj/views.py::

import rest_framework.decorators
import rest_framework.response


@rest_framework.decorators.api_view()
def test_view(request):
    return rest_framework.response.Response()


def not_view_func():
    pass

When I run the django.core.urlresolvers.resolve('/'), ResolverMatch.func_name has been set a invalid dotted name.

>>> import proj.views
>>> import django.core.urlresolvers
>>> resolve_match = django.core.urlresolvers.resolve('/')
>>> resolve_match.view_name
'rest_framework.decorators.test_view'

The module is set to the dotted name that to module defined it.

>>> proj.views.not_view_func.__module__
'proj.views'

But @api_view decorated view function's module has been set rest_framework.decorators.

>>> proj.views.test_view.__module__
'rest_framework.decorators'

Because @api_view decorated view function is WrappedAPIView,
and WrappedAPIView generated in the rest_framework.decorators.

>>> proj.views.test_view
<function WrappedAPIView at 0x110732e18>

https://github.com/tomchristie/django-rest-framework/blob/07efbdb45e5c7ef70249e985b3c1ef1cead455ba/rest_framework/decorators.py#L27-L31

ResolveMatch.view_name has been using it, so set invalid dotted name to ResolveMatch.view_name.

This issue has occrred because of the WrappedAPIView.name has been overwritten and WrappedAPIView.module has not been overwritten.
https://github.com/tomchristie/django-rest-framework/blob/07efbdb45e5c7ef70249e985b3c1ef1cead455ba/rest_framework/decorators.py#L57

The following results are obtained if overwriting module.

>>> import proj.views
>>> import django.core.urlresolvers
>>> resolve_match = django.core.urlresolvers.resolve('/')
>>> resolve_match.view_name
'proj.views.test_view'
>>> resolve_match
ResolverMatch(func=proj.views.test_view, args=(), kwargs={}, url_name=None, app_names=[], namespaces=[])

[tomchristie]

Closed via #4465.
Thanks!