          """
          # If the validators have been declared explicitly then use that.
          validators = getattr(getattr(self, 'Meta', None), 'validators', None)
          if validators is not None:
              return validators[:]
  
          # Otherwise use the default set of validators.
          return (
              self.get_unique_together_validators() +
              self.get_unique_for_date_validators()
 
</s> remove         return validators[:] if validators else []
 </s> add         return list(validators) if validators else [] </s> remove             self.validators = validators[:]
 </s> add             self.validators = list(validators) </s> remove         return self.default_validators[:]
 </s> add         return list(self.default_validators) </s> remove from rest_framework import fields, relations, serializers
 </s> add from rest_framework import exceptions, fields, relations, serializers
            return list(validators)
          """
          # If the validators have been declared explicitly then use that.
          validators = getattr(getattr(self, 'Meta', None), 'validators', None)
          if validators is not None:
            return list(validators)
  
          # Otherwise use the default set of validators.
          return (
              self.get_unique_together_validators() +
              self.get_unique_for_date_validators()
keep keep keep keep replace keep keep keep keep keep
 Adjusted field `validators` to accept iterables. (#6282)

Closes 6280. 
rest_framework/serializers.py