--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/db/__init__.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,82 @@
+import os
+from django.conf import settings
+from django.core import signals
+from django.core.exceptions import ImproperlyConfigured
+from django.utils.functional import curry
+from django.utils.importlib import import_module
+
+__all__ = ('backend', 'connection', 'DatabaseError', 'IntegrityError')
+
+if not settings.DATABASE_ENGINE:
+    settings.DATABASE_ENGINE = 'dummy'
+
+def load_backend(backend_name):
+    try:
+        # Most of the time, the database backend will be one of the official
+        # backends that ships with Django, so look there first.
+        return import_module('.base', 'django.db.backends.%s' % backend_name)
+    except ImportError, e:
+        # If the import failed, we might be looking for a database backend
+        # distributed external to Django. So we'll try that next.
+        try:
+            return import_module('.base', 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(__path__[0], '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 = []
+            available_backends.sort()
+            if backend_name not in available_backends:
+                error_msg = "%r isn't an available database backend. Available options are: %s\nError was: %s" % \
+                    (backend_name, ", ".join(map(repr, available_backends)), e_user)
+                raise ImproperlyConfigured(error_msg)
+            else:
+                raise # If there's some other error, this must be an error in Django itself.
+
+backend = load_backend(settings.DATABASE_ENGINE)
+
+# `connection`, `DatabaseError` and `IntegrityError` are convenient aliases
+# for backend bits.
+
+# DatabaseWrapper.__init__() takes a dictionary, not a settings module, so
+# we manually create the dictionary from the settings, passing only the
+# settings that the database backends care about. Note that TIME_ZONE is used
+# by the PostgreSQL backends.
+connection = backend.DatabaseWrapper({
+    'DATABASE_HOST': settings.DATABASE_HOST,
+    'DATABASE_NAME': settings.DATABASE_NAME,
+    'DATABASE_OPTIONS': settings.DATABASE_OPTIONS,
+    'DATABASE_PASSWORD': settings.DATABASE_PASSWORD,
+    'DATABASE_PORT': settings.DATABASE_PORT,
+    'DATABASE_USER': settings.DATABASE_USER,
+    'TIME_ZONE': settings.TIME_ZONE,
+})
+DatabaseError = backend.DatabaseError
+IntegrityError = backend.IntegrityError
+
+# Register an event that closes the database connection
+# when a Django request is finished.
+def close_connection(**kwargs):
+    connection.close()
+signals.request_finished.connect(close_connection)
+
+# Register an event that resets connection.queries
+# when a Django request is started.
+def reset_queries(**kwargs):
+    connection.queries = []
+signals.request_started.connect(reset_queries)
+
+# Register an event that rolls back the connection
+# when a Django request has an exception.
+def _rollback_on_exception(**kwargs):
+    from django.db import transaction
+    try:
+        transaction.rollback_unless_managed()
+    except DatabaseError:
+        pass
+signals.got_request_exception.connect(_rollback_on_exception)