Remove text-mangling of default values.

            value = [self.base_field.to_python(val) for val in vals]

        return value

    def get_default(self):

        """Overridden from the default to prevent string-mangling."""

        if self.has_default():

            if callable(self.default):

                return self.default()

            return self.default

        return None

    def value_to_string(self, obj):

        values = []

        vals = self._get_val_from_obj(obj)

        if self.has_default():

            if callable(self.default):

                return self.default()

            return force_text(self.default, strings_only=True)

            return self.default

        if (not self.empty_strings_allowed or (self.null and

                   not connection.features.interprets_empty_strings_as_nulls)):

            return None

  :exc:`~django.test.client.RedirectCycleError` if it detects a loop or hits a

  maximum redirect limit (rather than passing silently).

* Translatable strings set as the ``default`` parameter of the field are cast

  to concrete strings later, so the return type of ``Field.get_default()`` is

  different in some cases. There is no change to default values which are the

  result of a callable.

.. _deprecated-features-1.8:

Features deprecated in 1.8