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Improved error message when DATABASE_ENGINE is invalid. It now displays a list of all available database backends 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@215 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2005-07-19 19:04:12 +00:00
parent 258afd8fae
commit 5874952a8e
1 changed files with 8 additions and 1 deletions
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9
django/core/db/__init__.py
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@ -18,8 +18,15 @@ from django.conf.settings import DATABASE_ENGINE
try:
dbmod = __import__('django.core.db.backends.%s' % DATABASE_ENGINE, '', '', [''])
except ImportError:
# The database backend wasn't found. Display a helpful error message
# listing all possible database backends.
from django.core.exceptions import ImproperlyConfigured
raise ImproperlyConfigured, "Your DATABASE_ENGINE setting, %r, is invalid. Is it spelled correctly?" % DATABASE_ENGINE
import os
backend_dir = os.path.join(__path__[0], 'backends')
available_backends = [f[:-3] for f in os.listdir(backend_dir) if f.endswith('.py') and not f.startswith('__init__')]
available_backends.sort()
raise ImproperlyConfigured, "Your DATABASE_ENGINE setting, %r, is invalid. Is it spelled correctly? Available options are: %s" % \
(DATABASE_ENGINE, ', '.join(map(repr, available_backends)))
DatabaseError = dbmod.DatabaseError
db = dbmod.DatabaseWrapper()