cache request.user_permissions

src/c3nav/control/middleware.py

@@ -7,6 +7,15 @@ class UserPermissionsMiddleware:
     def __init__(self, get_response):
         self.get_response = get_response
 
+    def get_user_permissions(self, request):
+        try:
+            return getattr(request, '_user_permissions_cache')
+        except AttributeError:
+            pass
+        result = UserPermissions.get_for_user(request.user)
+        self._user_permissions_cache = result
+        return result
+
     def __call__(self, request):
-        request.user_permissions = SimpleLazyObject(lambda: UserPermissions.get_for_user(request.user))
+        request.user_permissions = SimpleLazyObject(lambda: self.get_user_permissions(request))
         return self.get_response(request)