Modified wait_for_db

app1/management/commands/wait_for_db.py

@@ -18,7 +18,7 @@ class Command(BaseCommand):
         db_up = False
         while db_up is False:
             try:
-                self.check(database=['default'])
+                self.check(databases=['default'])
                 db_up = True
             except (Psycopg2OpError, OperationalError):
                 self.stdout.write('Database unavailable, waiting 1 sec...')