Daily Incident app docs crash: NoneType object has no attribute strftime

[adborden]

Reproduction

1. Open http://localhost:8000/dailyIncid/doc/

Expected

Daily Incident docs are shown.

Actual

Environment:

Request Method: GET
Request URL: http://localhost:8000/dailyIncid/doc/

Django Version: 1.11.18
Python Version: 3.6.8
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.flatpages',
 'django.contrib.gis',
 'rest_framework',
 'dailyIncid']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.contrib.flatpages.middleware.FlatpageFallbackMiddleware']

Traceback:

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/app/showCrime/dailyIncid/views.py" in docView
  1004.     maxDateStr = maxDate.strftime('%b %d %Y')

Exception Type: AttributeError at /dailyIncid/doc/
Exception Value: 'NoneType' object has no attribute 'strftime'

[rbelew]

my guess is that this reflects the fact that the database hasn't been loaded:
maxDate =OakCrime.objects.filter( ... (line 999) returns None.

[rbelew]

dominated by Issue#64