since Flask 2.2: MethodView no longer has a metaclass (#238)

* since Flask 2.2: MethodView no longer has a metaclass

* Update changelog

Co-authored-by: Steven Loria <[email protected]>

Author: woutdenolf

CHANGELOG.rst

@@ -1,6 +1,14 @@
 Changelog
 ---------
 
+0.11.2 (unreleased)
+*******************
+
+Bug fixes:
+
+* Fix Flask 2.2 support (:issue:`237`). 
+  Thanks :user:`woutdenolf` for the catch and patch.
+
 0.11.1 (2022-03-29)
 *******************
 

docs/usage.rst

@@ -25,7 +25,7 @@ Use the :func:`use_kwargs <flask_apispec.annotations.use_kwargs>` and :func:`mar
     def list_pets(**kwargs):
         return Pet.query.filter_by(**kwargs).all()
 
-Decorators can also be applied to view classes, e.g. Flask's :class:`MethodView <flask.views.MethodView>` or flask-restful's :class:`Resource <flask_restful.Resource>`. For correct inheritance behavior, view classes should use the `ResourceMeta` meta-class; for convenience, **flask-apispec** provides `MethodResource`, which inherits from `MethodView` and uses the `ResourceMeta` and `MethodViewType` meta-classes.
+Decorators can also be applied to view classes, e.g. Flask's :class:`MethodView <flask.views.MethodView>` or flask-restful's :class:`Resource <flask_restful.Resource>`. For correct inheritance behavior, view classes should use the `ResourceMeta` meta-class; for convenience, **flask-apispec** provides `MethodResource`, which inherits from `MethodView` and uses the `ResourceMeta` meta-class.
 
 .. code-block:: python
 

examples/petstore.py

@@ -76,7 +76,7 @@ def get_pet(pet_id):
 
 docs.register(get_pet)
 
-class MethodResourceMeta(ResourceMeta, flask.views.MethodViewType):
+class MethodResourceMeta(ResourceMeta, type(flask.views.MethodView)):
     pass
 
 class MethodResource(flask.views.MethodView, metaclass=MethodResourceMeta):

flask_apispec/views.py

@@ -38,7 +38,7 @@ def __new__(mcs, name, bases, attrs):
         return klass
 
 
-class MethodResourceMeta(ResourceMeta, flask.views.MethodViewType):
+class MethodResourceMeta(ResourceMeta, type(flask.views.MethodView)):
     pass