Fixes error I encounter when no view is executed

[thinred]

Some time ago I started to get """RequestVarsDebugPanel' object has no attribute 'view_func'""" error.
It's caused by unset self.view_func value. This commit fixes the issue for me.
I'm not the first to notice it, though other patches didn't work for me.

[dcramer]

Could you tell me why self.view_func would be unset? I mostly want to add test coverage for this case for future regressions.

[thinred]

When the URL in the browser does not hit anything in urls.py, process_view is not called. I will prepare a simple project for you that triggers that.

[thinred]

Yes, this triggers on every new project with Django 1.3.
You may use this (then just enter any URL different from ""):

urls.py:

from django.conf.urls.defaults import url, patterns
from django.http import HttpResponse

def whatever(req):
    return HttpResponse(':)')

urlpatterns = patterns('',
    url(r'^$', whatever),
)

settings.py:

DEBUG = True
TEMPLATE_DEBUG = DEBUG
ADMINS = tuple()
MANAGERS = ADMINS
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3', # Add 'postgresql_psycopg2', 'postgresql', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': '/tmp/sq.tmp',                      # Or path to database file if using sqlite3.
        'USER': '',                      # Not used with sqlite3.
        'PASSWORD': '',                  # Not used with sqlite3.
        'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
    }
}
TIME_ZONE = 'America/Chicago'
LANGUAGE_CODE = 'en-us'
SITE_ID = 1
USE_I18N = True
USE_L10N = True
MEDIA_ROOT = ''
MEDIA_URL = ''
STATIC_ROOT = ''
STATIC_URL = '/static/'
ADMIN_MEDIA_PREFIX = '/static/admin/'
STATICFILES_DIRS = tuple()
STATICFILES_FINDERS = ('django.contrib.staticfiles.finders.AppDirectoriesFinder',)
SECRET_KEY = '))*0u-ko4bulu&avyzr1o*b&h3!&8^#5agvdylr)akw@3fy2xh'
TEMPLATE_LOADERS = ('django.template.loaders.app_directories.Loader',)
MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'debug_toolbar.middleware.DebugToolbarMiddleware',
)
ROOT_URLCONF = 'mockup.urls'
TEMPLATE_DIRS = tuple()
INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'debug_toolbar',
)

If you give me some time, I will write a unit test for that.

[apollo13]

It is caused by a middleware which returns a response in process_request -- as soon as that's the case process_view isn't called and bam no self.view_func (if the returned response has mimetype html debug_toolbar then tries to kick in and fails)

[thinred]

@apollo13:
You are right. Thanks for that: I added an additional commit with two unit tests to cover this issue.
@dcramer:
Is it ok?

[dcramer]

I love you guys for providing the tests :)

[mjacksonw]

Nice! Can't wait for this to make it into a release!