  
          if getattr(view, 'model', None):
              self.model = view.model
  
      def validate_request(self, data, files):
          """
          Given some content as input return some cleaned, validated content.
          Raises a :exc:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
          
          Validation is standard form or model form validation,
 
</s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None): </s> remove     def __init__(self, view):
        """
        Allow a :attr:`form` attributes set on the :class:`View` to override
        the :attr:`form` attribute set on the :class:`Resource`.
        """
        super(FormResource, self).__init__(view)

        if getattr(view, 'form', None):
            self.form = view.form

 </s> add  </s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None): </s> remove     def validate_request(self, data, files):
 </s> add     def validate_request(self, data, files=None): </s> remove         Given the request *data* return the cleaned, validated content.
        Typically raises an :class:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
 </s> add         Given the request *data* and optional *files*, return the cleaned, validated content.
        May raise an :class:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
    def validate_request(self, data, files=None):
  
          if getattr(view, 'model', None):
              self.model = view.model
  
    def validate_request(self, data, files=None):
          """
          Given some content as input return some cleaned, validated content.
          Raises a :exc:`response.ErrorResponse` with status code 400 (Bad Request) on failure.
          
          Validation is standard form or model form validation,
keep keep keep keep replace keep keep keep keep keep
 Allow .form specified on view.  Allow get_form, put_form, post_form.  Add .PARAMS. 
djangorestframework/resources.py