id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
22421	Loading fixtures with one-to-one inheritance on abstract model and M2M fails since 1.7 Beta	stanislas.guerra@…	Ramiro Morales	"Hi,

I am testing a project with the 1.7Beta release / master branch and Django can't load some fixtures when I am running my test-suite:


{{{
======================================================================
ERROR: test_validation_ajouter_double_page (fab4.front.tests.tests.DossierTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/test/testcases.py"", line 175, in __call__
    self._pre_setup()
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/test/testcases.py"", line 747, in _pre_setup
    self._fixture_setup()
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/test/testcases.py"", line 869, in _fixture_setup
    return super(TestCase, self)._fixture_setup()
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/test/testcases.py"", line 788, in _fixture_setup
    **{'verbosity': 0, 'database': db_name, 'skip_checks': True})
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/core/management/__init__.py"", line 167, in call_command
    return klass.execute(*args, **defaults)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/core/management/base.py"", line 337, in execute
    output = self.handle(*args, **options)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/core/management/commands/loaddata.py"", line 60, in handle
    self.loaddata(fixture_labels)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/core/management/commands/loaddata.py"", line 89, in loaddata
    self.load_label(fixture_label)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/core/management/commands/loaddata.py"", line 146, in load_label
    obj.save(using=self.using)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/core/serializers/base.py"", line 176, in save
    setattr(self.object, accessor_name, object_list)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/db/models/fields/related.py"", line 1183, in __set__
    manager = self.__get__(instance)
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/db/models/fields/related.py"", line 1169, in __get__
    through=self.field.rel.through,
  File ""/Users/stan/src/venv_dj_1_7/lib/python2.7/site-packages/Django-1.8.dev20140410233300-py2.7.egg/django/db/models/fields/related.py"", line 821, in __init__
    (instance, source_field_name))
ValueError: Problem installing fixture '/Users/stan/Dropbox/Projets/Aden/Publish/repos/publish/fab4/fabrication/fixtures/tests/fabrication/fabrication2.json': ""<Assistant: >"" needs to have a value for field ""user"" before this many-to-many relationship can be used.

}}}


My models are :


{{{
from django.contrib.sites.models import Site
from django.contrib.auth.models import User


class SupportManager(models.Manager):
    def get_current(self):
        return self.get(pk=settings.SITE_ID)

    def get_by_natural_key(self, short_name):
        return self.get(short_name=short_name)


class Support(Site):
    short_name = models.CharField('nom court', max_length=10, unique=True)
    logo = models.ImageField('logo', upload_to='images/supports', blank=True)
    site_ptr = models.OneToOneField(Site, primary_key=True)  # allow to do select related without an extra query to Site.
    objects = SupportManager()

    def __unicode__(self):
        return self.name

    def natural_key(self):
        return (self.short_name,)


class Organisation(models.Model):
    name = models.CharField(max_length=100)
    short_name = models.CharField('nom court', max_length=16)


class Employe(User):
    supports = models.ManyToManyField(Support)
    organisation = models.ForeignKey('Organisation', null=True, blank=True)
    filtre_organisation = models.BooleanField(default=False)
    telephone = models.CharField(u'téléphone', max_length=100, blank=True)

    class Meta:
        abstract = True

    def __unicode__(self):
        return self.get_full_name()


class Assistant(Employe):
    class Meta:
        verbose_name = 'chargé de clientèle'

}}}


The fixture causing the crash is a concat from the following dumps (master version of dumpdata):

{{{
python manage.py dumpdata sites.Site --indent=2 --natural-foreign --pk=1
python manage.py dumpdata parametrage.Support --indent=2 --natural-foreign --pk=1
python manage.py dumpdata auth.Group --indent=2 --natural-foreign --pk=2
python manage.py dumpdata auth.User --indent=2 --natural-foreign --pk=8
python manage.py dumpdata parametrage.Assistant --indent=2 --natural-foreign --pk=8

}}}

Which is :

{{{
[
{
  ""fields"": {
    ""domain"": ""proprietesdefrance.com"",
    ""name"": ""Propri\u00e9t\u00e9s de France""
  },
  ""model"": ""sites.site"",
  ""pk"": 1
},
{
  ""fields"": {
    ""logo"": ""images/supports/logo_PDF.jpg"",
    ""short_name"": ""PDF""
  },
  ""model"": ""parametrage.support"",
  ""pk"": 1
},
{
  ""fields"": {
    ""name"": ""Relation Client"",
    ""permissions"": [
      [
        ""add_logentry"",
        ""admin"",
        ""logentry""
      ],
      [
        ""change_statut_refus_bat_to_service_fab"",
        ""fabrication"",
        ""changementstatut""
      ],
      [
        ""see_all_status"",
        ""fabrication"",
        ""changementstatut""
      ],
      [
        ""see_chemindefer"",
        ""fabrication"",
        ""chemindefer""
      ],
      [
        ""add_dossier"",
        ""fabrication"",
        ""dossier""
      ],
      [
        ""change_dossier"",
        ""fabrication"",
        ""dossier""
      ],
      [
        ""change_prix_dossier"",
        ""fabrication"",
        ""dossier""
      ],
      [
        ""see_bat_pdf_dossier"",
        ""fabrication"",
        ""dossier""
      ],
      [
        ""change_logoconstructeur"",
        ""saisie"",
        ""logoconstructeur""
      ],
      [
        ""delete_logoconstructeur"",
        ""saisie"",
        ""logoconstructeur""
      ]
    ]
  },
  ""model"": ""auth.group"",
  ""pk"": 2
},
{
  ""fields"": {
    ""username"": ""igixxxxx"",
    ""first_name"": ""Isxxxxx"",
    ""last_name"": ""Gxxxxxx"",
    ""is_active"": true,
    ""is_superuser"": false,
    ""is_staff"": true,
    ""last_login"": ""2014-04-04T10:34:28"",
    ""groups"": [
      [
        ""Relation Client""
      ]
    ],
    ""user_permissions"": [],
    ""password"": ""sha1$17783$7152b7f25xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"",
    ""email"": ""igibxxxxx@xxxxxxxxx.fr"",
    ""date_joined"": ""2009-10-07T16:08:28""
  },
  ""model"": ""auth.user"",
  ""pk"": 8
},
{
  ""fields"": {
    ""organisation"": 1,
    ""telephone"": ""01 xx xx xx xx"",
    ""groups"": [
      [
        ""Relation Client""
      ]
    ],
    ""user_permissions"": [],
    ""filtre_organisation"": false,
    ""supports"": [
      [
        ""PDF""
      ]
    ]
  },
  ""model"": ""parametrage.assistant"",
  ""pk"": 8
}
]

}}}

Any idea ?

Thanks.

"	Bug	closed	Core (Serialization)	dev	Release blocker	fixed			Ready for checkin	1	0	0	0	0	0