Fixed #26431 -- Prevented django.urls.resolve() from returning missing optional parameters.

Previous behavior was inconsistent with django.urls.reverse() and
caused that translate_url() created an incorrect URL when an optional
parameter was missing.

1 files changed, 1 insertions, 1 deletions

diff --git a/django/urls/resolvers.py b/django/urls/resolvers.py
index af0508f94e..247e3680c0 100644
--- a/django/urls/resolvers.py
+++ b/django/urls/resolvers.py
@@ -153,7 +153,7 @@ class RegexPattern(CheckURLMixin):
             # If there are any named groups, use those as kwargs, ignoring
             # non-named groups. Otherwise, pass all non-named arguments as
             # positional arguments.
-            kwargs = match.groupdict()
+            kwargs = {k: v for k, v in match.groupdict().items() if v is not None}
             args = () if kwargs else match.groups()
             return path[match.end():], args, kwargs
         return None