[1.2.X] Fixed #13206 -- call super().__init__() in Model.__init__ to allow...

import types

import sys

from itertools import izip

import django.db.models.manager     # Imported to register signal handler.

from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned, FieldError, ValidationError, NON_FIELD_ERRORS

from django.core import validators

                    pass

            if kwargs:

                raise TypeError("'%s' is an invalid keyword argument for this function" % kwargs.keys()[0])

        super(Model, self).__init__()

        signals.post_init.send(sender=self.__class__, instance=self)

    def __repr__(self):

    def __unicode__(self):

        return self.content

class Mixin(object):

    def __init__(self):

        self.other_attr = 1

        super(Mixin, self).__init__()

class MixinModel(models.Model, Mixin):

    pass

from django.test import TestCase

from models import (Chef, CommonInfo, ItalianRestaurant, ParkingLot, Place,

    Post, Restaurant, Student, StudentWorker, Supplier, Worker)

    Post, Restaurant, Student, StudentWorker, Supplier, Worker, MixinModel)

class ModelInheritanceTests(TestCase):

        finally:

            settings.DEBUG = old_DEBUG

    def test_mixin_init(self):

        m = MixinModel()

        self.assertEqual(m.other_attr, 1)