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Ticket #8238: load-backend-pep-302.diff

File load-backend-pep-302.diff, 1.2 KB (added by bhuztez, 13 years ago)
taken from pep-302.5.diff for #596

diff --git a/django/db/utils.py b/django/db/utils.py
index 3f5b86e..5c4740f 100644

-              a
 import os
 from threading import local
+import pkgutil
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
-…
+               def load_backend(backend_name):
     except ImportError, e_user:
         # The database backend wasn't found. Display a helpful error message
         # listing all possible (built-in) database backends.
+        backend_dir = os.path.join(os.path.dirname(__file__), 'backends')
+        try:
+            available_backends = [f for f in os.listdir(backend_dir)
+                    if os.path.isdir(os.path.join(backend_dir, f))
+                    and not f.startswith('.')]
+        except EnvironmentError:
+            available_backends = []
+        backend_path = import_module('django.db.backends').__path__
+        available_backends = [ name for loader, name, ispkg
+                in pkgutil.iter_modules(backend_path)
+                if ispkg ]
         full_notation = backend_name.startswith('django.db.backends.')
         if full_notation:
             backend_name = backend_name[19:] # See #15621.