Django Rest Framework (DRF) Custom Unique Together Message

UniqueTogetherValidator.py

from django.utils.translation import ugettext_lazy as _
from rest_framework import serializers


class SomeSerializer(serializers.ModelSerializer):
  """
  Demostrating How to Override DRF UniqueTogetherValidator Message
  """

    class Meta:
        model = Some
        validators = [
            serializers.UniqueTogetherValidator(
                queryset=model.objects.all(),
                fields=('field1', 'field2'),
                message=_("Some custom message.")
            )
        ]

This worked for me as well.
Thanks a lot.

What if we want to check uniqueness based on lowercase character. can we do this in default validators or build own.