Fix none type link

doc/index.rst

@@ -191,3 +191,4 @@ usecase-driven documentation, see :ref:`get-started` or :ref:`user-guides`.
    glossary
    changes/index
    examples
+

sphinx/domains/python/_object.py

@@ -151,15 +151,49 @@ def make_xrefs(
 
 
 class PyField(PyXrefMixin, Field):
-    pass
+    def make_xref(
+        self,
+        rolename: str,
+        domain: str,
+        target: str,
+        innernode: type[TextlikeNode] = nodes.emphasis,
+        contnode: Node | None = None,
+        env: BuildEnvironment | None = None,
+        inliner: Inliner | None = None,
+        location: Node | None = None,
+    ) -> Node:
+        if rolename == 'class' and target == 'None':
+            # None is not a type, so use obj role instead.
+            rolename = 'obj'
+
+        return super().make_xref(
+            rolename, domain, target, innernode, contnode, env, inliner, location
+        )
 
 
 class PyGroupedField(PyXrefMixin, GroupedField):
     pass
 
 
 class PyTypedField(PyXrefMixin, TypedField):
-    pass
+    def make_xref(
+        self,
+        rolename: str,
+        domain: str,
+        target: str,
+        innernode: type[TextlikeNode] = nodes.emphasis,
+        contnode: Node | None = None,
+        env: BuildEnvironment | None = None,
+        inliner: Inliner | None = None,
+        location: Node | None = None,
+    ) -> Node:
+        if rolename == 'class' and target == 'None':
+            # None is not a type, so use obj role instead.
+            rolename = 'obj'
+
+        return super().make_xref(
+            rolename, domain, target, innernode, contnode, env, inliner, location
+        )
 
 
 class PyObject(ObjectDescription[tuple[str, str]]):

sphinx/util/typing.py

@@ -261,6 +261,7 @@ def restify(cls: Any, mode: _RestifyMode = 'fully-qualified-except-typing') -> s
     # things that are not types
     if cls is None or cls == types.NoneType:
         return ':py:obj:`None`'
+
     if cls is Ellipsis:
         return '...'
     if isinstance(cls, str):