old_contents: from django.db import models
  from django.contrib.auth.models import User
  from django.conf import settings
  from django.utils.translation import ugettext_lazy as _
  from django.dispatch import receiver
  from django.contrib.auth.signals import user_logged_in
  
  
  class Structure(models.Model):
      """
      Represents an organisational structure, to which users are related.
      """
      name = models.CharField(max_length=256, verbose_name=_(u"Nom"))
  
      def __unicode__(self):
          return self.name
  
      class Meta:
          verbose_name = _(u"Structure")
          verbose_name_plural = _(u"Structures")
  
  
  def default_structure():
      return Structure.objects.get_or_create(name=settings.DEFAULT_STRUCTURE_NAME)[0]
  
  
  class StructureRelatedManager(models.Manager):
      def byUser(self, user):
          qs = super(StructureRelatedManager, self).get_query_set()
          return qs.filter(structure=user.profile.structure)
  
  
  class StructureRelated(models.Model):
      """
      A mixin used for any entities that belong to a structure
      """
      structure = models.ForeignKey(Structure, default=default_structure, verbose_name=_(u"Related structure")
  
      objects = models.Manager()
      in_structure = StructureRelatedManager()
  
      @classmethod
      def forUser(cls, user):
          return cls.in_structure.byUser(user)
  
      class Meta:
          abstract = True
          verbose_name = _(u"Related structures")
          verbose_name_plural = _(u"Related structure")
  
  
  class UserProfile(StructureRelated):
      user = models.OneToOneField(User, unique=True)
  
      language = models.CharField(_(u"Language"), max_length=10,
                                  choices=settings.LANGUAGES,
                                  default=settings.LANGUAGE_CODE)
      class Meta:
          verbose_name = _(u"User's profile")
          verbose_name_plural = _(u"User's profiles")
  
      def __unicode__(self):
          return _("Profile for %s") % self.user
  
  User.profile = property(lambda u: UserProfile.objects.get_or_create(user=u)[0])
  
  
  @receiver(user_logged_in)
  def lang(sender, **kwargs):
      """ Set user's language in session when he logs in. """
      lang_code = kwargs['user'].profile.language
      kwargs['request'].session['django_language'] = lang_code
  
new_contents: from django.db import models
  from django.contrib.auth.models import User
  from django.conf import settings
  from django.utils.translation import ugettext_lazy as _
  from django.dispatch import receiver
  from django.contrib.auth.signals import user_logged_in
  
  
  class Structure(models.Model):
      """
      Represents an organisational structure, to which users are related.
      """
      name = models.CharField(max_length=256, verbose_name=_(u"Nom"))
  
      def __unicode__(self):
          return self.name
  
      class Meta:
          verbose_name = _(u"Structure")
          verbose_name_plural = _(u"Structures")
  
  
  def default_structure():
      return Structure.objects.get_or_create(name=settings.DEFAULT_STRUCTURE_NAME)[0]
  
  
  class StructureRelatedManager(models.Manager):
      def byUser(self, user):
          qs = super(StructureRelatedManager, self).get_query_set()
          return qs.filter(structure=user.profile.structure)
  
  
  class StructureRelated(models.Model):
      """
      A mixin used for any entities that belong to a structure
      """
      structure = models.ForeignKey(Structure, default=default_structure, verbose_name=_(u"Related structure"))
  
      objects = models.Manager()
      in_structure = StructureRelatedManager()
  
      @classmethod
      def forUser(cls, user):
          return cls.in_structure.byUser(user)
  
      class Meta:
          abstract = True
          verbose_name = _(u"Related structures")
          verbose_name_plural = _(u"Related structure")
  
  
  class UserProfile(StructureRelated):
      user = models.OneToOneField(User, unique=True)
  
      language = models.CharField(_(u"Language"), max_length=10,
                                  choices=settings.LANGUAGES,
                                  default=settings.LANGUAGE_CODE)
      class Meta:
          verbose_name = _(u"User's profile")
          verbose_name_plural = _(u"User's profiles")
  
      def __unicode__(self):
          return _("Profile for %s") % self.user
  
  User.profile = property(lambda u: UserProfile.objects.get_or_create(user=u)[0])
  
  
  @receiver(user_logged_in)
  def lang(sender, **kwargs):
      """ Set user's language in session when he logs in. """
      lang_code = kwargs['user'].profile.language
      kwargs['request'].session['django_language'] = lang_code
  
subject: Add missing parenthesis