403 on OPTIONS

When we save a form, the preflight OPTIONS request is blocked with a 403 error.

Here url paths:

urlpatterns = [
    url(r'^$', views.index, name='index'),
    url(r'^users/', LDPViewSet.urls(model=User), name='users_sib'),
    url(r'^elected/', LDPViewSet.urls(model=Elected), name='electeds_sib'),
]

And the model:

class Elected(models.Model):
    civility = models.CharField(max_length=100, null=True, verbose_name=u"Civilité")
    firstname = models.CharField(max_length=100, null=True, verbose_name=u"Prénom")
    lastname = models.CharField(max_length=100, null=True, verbose_name=u"Nom")
    function = models.CharField(max_length=255, null=True, verbose_name=u"Fonction")
    title = models.CharField(max_length=255, null=True, verbose_name=u"Titre")
    protocol_role = models.CharField(max_length=100, null=True, verbose_name=u"Rôle protocolaire")
    protocol_person = models.CharField(max_length=100, null=True, verbose_name=u"Personne protocolaire")
    political_party = models.CharField(max_length=100, null=True, verbose_name=u"Parti politique")
    election_department = models.CharField(max_length=100, null=True, verbose_name=u"Département d'élection")
    election_region = models.CharField(max_length=100, blank=True, null=True, verbose_name=u"Région d'élection")
    phone_direct = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Tél. mobile direct")
    phone_organization = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Tél. organisation")
    email_direct = models.EmailField(max_length=100, blank=True, null=True, verbose_name=u"Email direct")
    email_organization = models.EmailField(max_length=100, blank=True, null=True, verbose_name=u"Email Organisation")
    address1 = models.CharField(max_length=255, blank=True, null=True, verbose_name=u"Adresse 1")
    address2 =  models.CharField(max_length=255, blank=True, null=True, verbose_name=u"Adresse 2")
    postal_code = models.IntegerField(blank=True, null=True, verbose_name=u"Code postal")
    city = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Ville")
    country = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Pays")
    website = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Site web")
    organization_type = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Type d'organisation")
    organization_subtype = models.CharField(max_length=50, blank=True, null=True, verbose_name=u"Sous-type d'organisation")
    photo = models.URLField(verbose_name=u"Photo", default=settings.SITE_URL + "static/img/avatar.png")

    def __str__(self):
        if self.firstname and self.lastname:
            return self.firstname + " " + self.lastname
        else:``
            return "no name"

By Gino on 2018-11-23T18:06:22 (imported from GitLab project)

closed via commit 52d5b820

@Ladowitch @clairezed @zenate @clement should be fixed by 0.5a11

mentioned in commit 52d5b820