diff --git a/redash/permissions.py b/redash/permissions.py
index b69e21f4a9..7118a6b83d 100644
--- a/redash/permissions.py
+++ b/redash/permissions.py
@@ -15,17 +15,19 @@
 
 
 def has_access(obj, user, need_view_only):
+    groups = obj.groups if hasattr(obj, 'groups') else obj
+
     if 'admin' in user.permissions:
         return True
 
-    matching_groups = set(obj.groups.keys()).intersection(user.group_ids)
+    matching_groups = set(groups.keys()).intersection(user.group_ids)
 
     if not matching_groups:
         return False
 
     required_level = 1 if need_view_only else 2
 
-    group_level = 1 if all(flatten([obj.groups[group] for group in matching_groups])) else 2
+    group_level = 1 if all(flatten([groups[group] for group in matching_groups])) else 2
 
     return required_level <= group_level