code: def create_object(self, data, view_kwargs):
          
          self.before_create_object(data, view_kwargs)
  
          relationship_fields = get_relationships(self.resource.schema, model_field=True)
          nested_fields = get_nested_fields(self.resource.schema, model_field=True)
  
          join_fields = relationship_fields + nested_fields
  
          obj = self.model(**{key: value
                              for (key, value) in data.items() if key not in join_fields})
          self.apply_relationships(data, obj)
          self.apply_nested_fields(data, obj)
  
          self.session.add(obj)
          try:
              self.session.commit()
          except JsonApiException as e:
              self.session.rollback()
              raise e
          except Exception as e:
              self.session.rollback()
              raise JsonApiException("Object creation error: " + str(e), source={'pointer': '/data'})
  
          self.after_create_object(obj, data, view_kwargs)
  
          return obj
docs: Create an object through sqlalchemy
  
          :param dict data: the data validated by marshmallow
          :param dict view_kwargs: kwargs from the resource view
          :return DeclarativeMeta: an object from sqlalchemy