old_contents: """
  The manager classes.
  """
  import django
  from django.db.models.query import QuerySet
  from mptt.managers import TreeManager
  from parler.managers import TranslatableManager, TranslatableQuerySet
  
  try:
      # mptt 0.7 has queryset methods too
      from mptt.querysets import TreeQuerySet
  except ImportError:
      # provide compatibility with older mptt versions by adding a stub.
      class TreeQuerySet(QuerySet):
          pass
  
  
  class CategoryQuerySet(TranslatableQuerySet, TreeQuerySet):
      """
      The Queryset methods for the Category model.
      """
      def as_manager(cls):
          # Make sure the Django 1.7 way of creating managers works.
          manager = CategoryManager.from_queryset(cls)()
          manager._built_with_as_manager = True
          return manager
      as_manager.queryset_only = True
      as_manager = classmethod(as_manager)
  
  
  class CategoryManager(TreeManager, TranslatableManager):
      """
      Base manager class for the categories.
      """
      # This attribute is now a standard property in Django 1.7:
      _queryset_class = CategoryQuerySet
  
      def get_queryset(self):
          return self._queryset_class(self.model, using=self._db).order_by(self.tree_id_attr, self.left_attr)
  
      # For Django 1.5
      if django.VERSION < (1, 7):
          get_query_set = get_queryset
  
new_contents: """
  The manager classes.
  """
  import django
  from django.db.models.query import QuerySet
  from mptt.managers import TreeManager
  from parler.managers import TranslatableManager, TranslatableQuerySet
  
  try:
      # mptt 0.7 has queryset methods too
      from mptt.querysets import TreeQuerySet
  except ImportError:
      # provide compatibility with older mptt versions by adding a stub.
      class TreeQuerySet(QuerySet):
          pass
  
  
  class CategoryQuerySet(TranslatableQuerySet, TreeQuerySet):
      """
      The Queryset methods for the Category model.
      """
      def as_manager(cls):
          # Make sure the Django 1.7 way of creating managers works.
          manager = CategoryManager.from_queryset(cls)()
          manager._built_with_as_manager = True
          return manager
      as_manager.queryset_only = True
      as_manager = classmethod(as_manager)
  
  
  class CategoryManager(TreeManager, TranslatableManager):
      """
      Base manager class for the categories.
      """
      _queryset_class = CategoryQuerySet
  
      def get_queryset(self):
          # Nasty: In some django-mptt 0.7 versions, TreeManager.get_querset() no longer calls super()
          # Hence, redefine get_queryset() here to have the logic from django-parler and django-mptt.
          return self._queryset_class(self.model, using=self._db).order_by(self.tree_id_attr, self.left_attr)
  
      # For Django 1.5
      if django.VERSION < (1, 7):
          get_query_set = get_queryset
  
subject: Comment on get_queryset() logic