code: def get_field_value(obj, field):
      
      if isinstance(field, DateTimeField):
          # DateTimeFields are timezone-aware, so we need to convert the field
          # to its naive form before we can accuratly compare them for changes.
          try:
              value = field.to_python(getattr(obj, field.name, None))
              if value is not None and settings.USE_TZ and not timezone.is_naive(value):
                  value = timezone.make_naive(value, timezone=timezone.utc)
          except ObjectDoesNotExist:
              value = field.default if field.default is not NOT_PROVIDED else None
      else:
          try:
              value = smart_text(getattr(obj, field.name, None))
          except ObjectDoesNotExist:
              value = field.default if field.default is not NOT_PROVIDED else None
  
      return value
docs: Gets the value of a given model instance field.
      :param obj: The model instance.
      :type obj: Model
      :param field: The field you want to find the value of.
      :type field: Any
      :return: The value of the field as a string.
      :rtype: str