Fixed #12718 -- Tighten up the error handling when loading database r…

…outers. Thanks to Jeff Balogh for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12336 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/utils.py

@@ -95,11 +95,12 @@ def __init__(self, routers):
                 try:
                     module_name, klass_name = r.rsplit('.', 1)
                     module = import_module(module_name)
-                    router = getattr(module, klass_name)()
                 except ImportError, e:
                     raise ImproperlyConfigured('Error importing database router %s: "%s"' % (klass_name, e))
+                try:
+                    router = getattr(module, klass_name)()
                 except AttributeError:
-                    raise ImproperlyConfigured('Module "%s" does not define a "%s" database router' % (module, klass_name))
+                    raise ImproperlyConfigured('Module "%s" does not define a database router name "%s"' % (module, klass_name))
             else:
                 router = r
             self.routers.append(router)