add if-then-else

pallets · Aug 19, 2017 · 5a171ff · 5a171ff
1 parent 2f05076
commit 5a171ff
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/flask/blueprints.py b/flask/blueprints.py
@@ -198,7 +198,8 @@ def add_url_rule(self, rule, endpoint=None, view_func=None, **options):
         """
         if endpoint:
             assert '.' not in endpoint, "Blueprint endpoints should not contain dots"
-        assert '.' not in view_func.__name__, "Blueprint view function name should not contain dots"
+        if view_func:
+            assert '.' not in view_func.__name__, "Blueprint view function name should not contain dots"
         self.record(lambda s:
             s.add_url_rule(rule, endpoint, view_func, **options))