Rename swagger_serializer_method parameter and update docs

docs/custom_spec.rst

@@ -159,45 +159,53 @@ Where you can use the :func:`@swagger_auto_schema <.swagger_auto_schema>` decora
 Support for SerializerMethodField
 *********************************
 
-Schema generation of ``serializers.SerializerMethodField`` supported in two ways:
+Schema generation of ``serializers.SerializerMethodField`` is supported in two ways:
 
-1) The decorator ``swagger_serializer_method(serializer)`` for the use case where the serializer method
-   is using a serializer.  e.g.:
+1) The :func:`swagger_serializer_method <.swagger_serializer_method>` decorator for the use case where the serializer
+   method is using a serializer. e.g.:
 
-
-.. code-block:: python
+   .. code-block:: python
 
       from drf_yasg.utils import swagger_serializer_method
 
-
       class OtherStuffSerializer(serializers.Serializer):
           foo = serializers.CharField()
 
-
       class ParentSerializer(serializers.Serializer):
-
           other_stuff = serializers.SerializerMethodField()
 
-       @swagger_serializer_method(serializer=OtherStuffSerializer)
+          @swagger_serializer_method(serializer_or_field=OtherStuffSerializer)
           def get_other_stuff(self, obj):
               return OtherStuffSerializer().data
 
 
-Note that the serializer parameter can be either be a serializer class or instance
+   Note that the ``serializer_or_field`` parameter can accept either a subclass or an instance of ``serializers.Field``.
 
 
-2) For simple cases where the method is returning one of the supported types,
-   `Python 3 type hinting`_ of the serializer method return value can be used.  e.g.:
+2) For simple cases where the method is returning one of the supported types, `Python 3 type hinting`_ of the
+   serializer method return value can be used. e.g.:
 
    .. code-block:: python
 
       class SomeSerializer(serializers.Serializer):
-
           some_number = serializers.SerializerMethodField()
 
           def get_some_number(self, obj) -> float:
               return 1.0
 
+   When return type hinting is not supported, the equivalent ``serializers.Field`` subclass can be used with
+   :func:`swagger_serializer_method <.swagger_serializer_method>`:
+
+   .. code-block:: python
+
+      class SomeSerializer(serializers.Serializer):
+          some_number = serializers.SerializerMethodField()
+
+          @swagger_serializer_method(serializer_or_field=serializers.FloatField)
+          def get_some_number(self, obj):
+              return 1.0
+
+
 ********************************
 Serializer ``Meta`` nested class
 ********************************

src/drf_yasg/inspectors/field.py

@@ -459,8 +459,8 @@ def get_basic_type_info_from_hint(hint_class):
 
 
 class SerializerMethodFieldInspector(FieldInspector):
-    """Provides conversion for SerializerMethodField, optionally using information from the swagger_method_field
-    decorator
+    """Provides conversion for SerializerMethodField, optionally using information from the swagger_serializer_method
+    decorator.
     """
 
     def field_to_swagger_object(self, field, swagger_object_type, use_references, **kwargs):

src/drf_yasg/utils.py

@@ -178,18 +178,18 @@ def swagger_auto_schema(method=None, methods=None, auto_schema=unset, request_bo
     return decorator
 
 
-def swagger_serializer_method(serializer):
+def swagger_serializer_method(serializer_or_field):
     """
     Decorates the method of a serializers.SerializerMethodField
     to hint as to how Swagger should be generated for this field.
 
-    :param serializer: serializer class or instance
+    :param serializer_or_field: ``Serializer``/``Field`` class or instance
     :return:
     """
 
     def decorator(serializer_method):
         # stash the serializer for SerializerMethodFieldInspector to find
-        serializer_method._swagger_serializer = serializer
+        serializer_method._swagger_serializer = serializer_or_field
         return serializer_method
 
     return decorator

testproj/users/method_serializers_without_typing.py

@@ -22,21 +22,21 @@ class MethodFieldExampleSerializer(serializers.Serializer):
     hinted_bool = serializers.SerializerMethodField(
         help_text="the type hint on the method should determine this to be a bool")
 
-    @swagger_serializer_method(serializer=serializers.BooleanField)
+    @swagger_serializer_method(serializer_or_field=serializers.BooleanField)
     def get_hinted_bool(self, obj):
         return True
 
     hinted_int = serializers.SerializerMethodField(
         help_text="the type hint on the method should determine this to be an integer")
 
-    @swagger_serializer_method(serializer=serializers.IntegerField)
+    @swagger_serializer_method(serializer_or_field=serializers.IntegerField)
     def get_hinted_int(self, obj):
         return 1
 
     hinted_float = serializers.SerializerMethodField(
         help_text="the type hint on the method should determine this to be a number")
 
-    @swagger_serializer_method(serializer=serializers.FloatField)
+    @swagger_serializer_method(serializer_or_field=serializers.FloatField)
     def get_hinted_float(self, obj):
         return 1.0
 
@@ -44,28 +44,28 @@ class MethodFieldExampleSerializer(serializers.Serializer):
         help_text="the type hint on the method should determine this to be a decimal")
 
     # note that in this case an instance is required since DecimalField has required arguments
-    @swagger_serializer_method(serializer=serializers.DecimalField(max_digits=6, decimal_places=4))
+    @swagger_serializer_method(serializer_or_field=serializers.DecimalField(max_digits=6, decimal_places=4))
     def get_hinted_decimal(self, obj):
         return decimal.Decimal(1)
 
     hinted_datetime = serializers.SerializerMethodField(
         help_text="the type hint on the method should determine this to be a datetime")
 
-    @swagger_serializer_method(serializer=serializers.DateTimeField)
+    @swagger_serializer_method(serializer_or_field=serializers.DateTimeField)
     def get_hinted_datetime(self, obj):
         return datetime.datetime.now()
 
     hinted_date = serializers.SerializerMethodField(
         help_text="the type hint on the method should determine this to be a date")
 
-    @swagger_serializer_method(serializer=serializers.DateField)
+    @swagger_serializer_method(serializer_or_field=serializers.DateField)
     def get_hinted_date(self, obj):
         return datetime.date.today()
 
     hinted_uuid = serializers.SerializerMethodField(
         help_text="the type hint on the method should determine this to be a uuid")
 
-    @swagger_serializer_method(serializer=serializers.UUIDField)
+    @swagger_serializer_method(serializer_or_field=serializers.UUIDField)
     def get_hinted_uuid(self, obj):
         return uuid.uuid4()
 

testproj/users/serializers.py

@@ -26,7 +26,7 @@ class UserSerializerrr(serializers.ModelSerializer):
 
     hint_example = MethodFieldExampleSerializer()
 
-    @swagger_serializer_method(serializer=OtherStuffSerializer)
+    @swagger_serializer_method(serializer_or_field=OtherStuffSerializer)
     def get_other_stuff(self, obj):
         """
         method_field that uses a serializer internally.
@@ -41,7 +41,7 @@ class UserSerializerrr(serializers.ModelSerializer):
         help_text="help text on field is set, so this should appear in swagger"
     )
 
-    @swagger_serializer_method(serializer=serializers.IntegerField(
+    @swagger_serializer_method(serializer_or_field=serializers.IntegerField(
         help_text="decorated instance help_text shouldn't appear in swagger because field has priority"))
     def get_help_text_example_1(self):
         """
@@ -52,7 +52,7 @@ class UserSerializerrr(serializers.ModelSerializer):
 
     help_text_example_2 = serializers.SerializerMethodField()
 
-    @swagger_serializer_method(serializer=serializers.IntegerField(
+    @swagger_serializer_method(serializer_or_field=serializers.IntegerField(
         help_text="instance help_text is set, so should appear in swagger"))
     def get_help_text_example_2(self):
         """
@@ -63,7 +63,7 @@ class UserSerializerrr(serializers.ModelSerializer):
 
     help_text_example_3 = serializers.SerializerMethodField()
 
-    @swagger_serializer_method(serializer=serializers.IntegerField())
+    @swagger_serializer_method(serializer_or_field=serializers.IntegerField())
     def get_help_text_example_3(self):
         """
         docstring is set so should appear in swagger as fallback