django.core.exceptions.ImproperlyConfigured:constance.backends.database app isn't installed correctly

Question

Hi I am setting up my django with virtualenv
When I run python manage.py migrate, I got this error.

File "/Users/anh/testRadicards/env/lib/python2.7/site- packages/constance/backends/database/init.py", line 27, in init
"The constance.backends.database app isn't installed " django.core.exceptions.ImproperlyConfigured: The constance.backends.database app isn't installed correctly. Make sure it's in your INSTALLED_APPS setting.

This is my setup, running with Mac OSX 10.5, on Python 2.7:
1. cd into my project dir
2. run virtualenv --no-site-packages env
3. activate my virtualenv with source/env/bin/activate
4. pip install django (currently 1.7.1)
5. git clone a django project repo called radicards
6. cd into radicards
7. run python.manage.py runserver

(The repo radicards already have a sqlite db setup, so there's no need for migration).

I followed the error code and open settings.py and it include this:

INSTALLED_APPS = (
'constance',
'constance.backends.database',
'rd_suit',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'paintstore',
'cards',
)

'Contance.backends.database' is included. I heard django 1.7 has some issues with unique name error.
What should I do? To set this up.

Answer 1

Try adding this setting to your settings.py file:

CONSTANCE_BACKEND = 'constance.backends.database.DatabaseBackend'