Fixed #25550 -- Deprecated direct assignment to the reverse side of a related set.

        models.Model.save_base(self.object, using=using, raw=True, **kwargs)

        if self.m2m_data and save_m2m:

            for accessor_name, object_list in self.m2m_data.items():

                setattr(self.object, accessor_name, object_list)

                getattr(self.object, accessor_name).set(object_list)

        # prevent a second (possibly accidental) call to save() from saving

        # the m2m data twice.

        return getattr(obj, self.attname).all()

    def save_form_data(self, instance, data):

        setattr(instance, self.attname, data)

        getattr(instance, self.attname).set(data)

    def formfield(self, **kwargs):

        db = kwargs.pop('using', None)

from __future__ import unicode_literals

import warnings

from operator import attrgetter

from django.db import connections, router, transaction

from django.db.models import Q, signals

from django.db.models.query import QuerySet

from django.utils.deprecation import RemovedInDjango20Warning

from django.utils.functional import cached_property

        - ``instance`` is the ``parent`` instance

        - ``value`` in the ``children`` sequence on the right of the equal sign

        """

        warnings.warn(

            'Direct assignment to the reverse side of a related set is '

            'deprecated due to the implicit save() that happens. Use %s.set() '

            'instead.' % self.rel.get_accessor_name(), RemovedInDjango20Warning, stacklevel=2,

        )

        manager = self.__get__(instance)

        manager.set(value)

* The ``makemigrations --exit`` option will be removed.

* Support for direct assignment to a reverse foreign key or many-to-many

  relation will be removed.

.. _deprecation-removed-in-1.10:

1.10

        Many-to-many field to :class:`~django.contrib.auth.models.Permission`::

            group.permissions = [permission_list]

            group.permissions.set([permission_list])

            group.permissions.add(permission, permission, ...)

            group.permissions.remove(permission, permission, ...)

            group.permissions.clear()