      Validator that corresponds to `unique=True` on a model field.
  
      Should be applied to an individual field on the serializer.
      """
      message = _("This field must be unique.")
  
      def __init__(self, queryset, message=None):
          self.queryset = queryset
          self.serializer_field = None
          self.message = message or self.message
 
</s> remove     message = _("The fields {field_names} must make a unique set.")
    missing_message = _("This field is required.")
 </s> add     message = _('The fields {field_names} must make a unique set.')
    missing_message = _('This field is required.') </s> remove     missing_message = _("This field is required.")
 </s> add     missing_message = _('This field is required.') </s> remove     message = _("This field must be unique for the \"{date_field}\" date.")
 </s> add     message = _('This field must be unique for the "{date_field}" date.') </s> remove     message = _("This field must be unique for the \"{date_field}\" year.")
 </s> add     message = _('This field must be unique for the "{date_field}" year.') </s> remove     message = _("This field must be unique for the \"{date_field}\" month.")
 </s> add     message = _('This field must be unique for the "{date_field}" month.')
    message = _('This field must be unique.')
      Validator that corresponds to `unique=True` on a model field.
  
      Should be applied to an individual field on the serializer.
      """
    message = _('This field must be unique.')
  
      def __init__(self, queryset, message=None):
          self.queryset = queryset
          self.serializer_field = None
          self.message = message or self.message
keep keep keep keep replace keep keep keep keep keep
 prefer single quotes in source and double quotes in user visible strings; add some missing full stops to user visible strings 
rest_framework/validators.py