DRF Switch IO Field

drf_switch_io_field.py

class SwitchIOField(Field):
    def __init__(
            self,
            input_field: Field,
            output_field: Field,
            *args, **kwargs
    ):
        # -- setting up input field
        self.input_field = input_field
        self.validators = input_field.validators
        self.input_field.read_only = True

        # -- setting up output field
        self.output_field = output_field
        self.output_field.write_only = True
        # -- copy field data
        self.output_field.required = kwargs.get('required', False)
        self.output_field.allow_null = kwargs.get('allow_null', False)
        self.label = self.output_field.label or kwargs.get('label', None)
        self.source = self.output_field.source or kwargs.get('source', None)

        super().__init__(*args, **kwargs)

    def validate_empty_values(self, data):
        return self.output_field.validate_empty_values(data)

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

    def to_representation(self, value):
        return self.output_field.to_internal_value(value)