[GitHub] [airflow] ashb commented on a diff in pull request #22858: Speed up `has_access` decorator by ~200ms

[GitBox <gi...@apache.org>]

ashb commented on code in PR #22858:
URL: https://github.com/apache/airflow/pull/22858#discussion_r846295180


##########
airflow/www/fab_security/sqla/models.py:
##########
@@ -229,10 +229,24 @@ def is_anonymous(self):
 
     @property
     def perms(self):
-        perms = set()
-        for role in self.roles:
-            perms.update((perm.action.name, perm.resource.name) for perm in role.permissions)
-        return perms
+        if not self._perms_cache:
+            # Using the ORM here is _slow_ (Creating lots of objects to then throw them away) since this is in
+            # the path for every request. Avoid it if we can!
+            if current_app:
+                sm = current_app.appbuilder.sm
+                self._perms_cache: Set[Tuple[str, str]] = set(
+                    sm.get_session.query(sm.action_model.name, sm.resource_model.name)
+                    .join(sm.permission_model.action)
+                    .join(sm.permission_model.resource)
+                    .join(sm.permission_model.role)
+                    .filter(sm.role_model.user.contains(g.user))

Review Comment:
   ```suggestion
                       .filter(sm.role_model.user.contains(self))
   ```



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