How to serialize a single value?

[domingues]

I have an endpoint that returns a list of IDs and I want to produce the following schema:

      responses:
        '200':
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/PersonId'
--
components:
  schemas:
    PersonId:
      type: string

To achieve this I created a simple FieldSerializer

class FieldSerializer(serializers.BaseSerializer):
    field: serializers.Field = None

    def __init__(self, *args, **kwargs):
        self.field = kwargs.pop('field', copy.deepcopy(self.field))
        assert self.field is not None, '`field` is a required argument.'
        assert not inspect.isclass(self.field), '`field` has not been instantiated.'
        super().__init__(*args, **kwargs)
        self.field.bind(field_name='', parent=self.parent)

    def to_internal_value(self, data):
        return self.field.to_internal_value(data)

    def to_representation(self, instance):
        return self.field.to_representation(instance)

and modified get_componetns and get_responses of AutoSchema to process BaseSerializers instead of only Serializers.

Don't know if this is the best approach... Comments are welcomed.