Fixes #103, adds support for @post_load:

Marshmallow `@post_load` decorator can be used as a factory object, to directly
return an instance instead of the usual dictionary.

This commit adds support for it.

Author: elatomo

flask_apispec/wrapper.py

@@ -43,8 +43,11 @@ def call_view(self, *args, **kwargs):
                 parsed = parser.parse(schema, locations=option['kwargs']['locations'])
                 if getattr(schema, 'many', False):
                     args += tuple(parsed)
-                else:
+                elif getattr(parsed, 'update', False):
                     kwargs.update(parsed)
+                else:
+                    args += (parsed, )
+
         return self.func(*args, **kwargs)
 
     def marshal_result(self, unpacked, status_code):

tests/test_views.py

@@ -3,7 +3,7 @@
 import json
 
 from flask import make_response
-from marshmallow import fields, Schema
+from marshmallow import fields, Schema, post_load
 
 from flask_apispec.utils import Ref
 from flask_apispec.views import MethodResource
@@ -30,6 +30,28 @@ def view(**kwargs):
         res = client.get('/', {'name': 'freddie'})
         assert res.json == {'name': 'freddie'}
 
+    def test_use_kwargs_schema_with_post_load(self, app, client):
+        class User:
+            def __init__(self, name):
+                self.name = name
+
+        class ArgSchema(Schema):
+            name = fields.Str()
+
+            @post_load
+            def make_object(self, data):
+                return User(**data)
+
+        @app.route('/', methods=('POST', ))
+        @use_kwargs(ArgSchema())
+        def view(user):
+            assert isinstance(user, User)
+            return {'name': user.name}
+
+        data = {'name': 'freddie'}
+        res = client.post('/', data)
+        assert res.json == data
+
     def test_use_kwargs_schema_many(self, app, client):
         class ArgSchema(Schema):
             name = fields.Str()