Add missing decorator: versioning_class

Mirrors encode/django-rest-framework#9719

Author: qqii

adrf/decorators.py

@@ -22,9 +22,9 @@ def decorator(func):
         #     WrappedAPIView.__doc__ = func.doc    <--- Not possible to do this
 
         # api_view applied without (method_names)
-        assert not (
-            isinstance(http_method_names, types.FunctionType)
-        ), "@api_view missing list of allowed HTTP methods"
+        assert not (isinstance(http_method_names, types.FunctionType)), (
+            "@api_view missing list of allowed HTTP methods"
+        )
 
         # api_view applied with eg. string instead of list of strings
         assert isinstance(http_method_names, (list, tuple)), (
@@ -75,6 +75,10 @@ def handler(self, *args, **kwargs):
             func, "permission_classes", APIView.permission_classes
         )
 
+        WrappedAPIView.versioning_class = getattr(
+            func, "versioning_class", APIView.versioning_class
+        )
+
         WrappedAPIView.schema = getattr(func, "schema", APIView.schema)
 
         return WrappedAPIView.as_view()