old_contents: from django.db.models import Manager
  
  
  class FilteredManager(Manager):
      def __init__(self, **kwargs):
          self.filter_args = kwargs
          super(FilteredManager, self).__init__()
  
      def get_queryset(self):
          return super(FilteredManager, self).get_query_set() \
                  .filter(**self.filter_args)
  
      def get_query_set(self):
          return self.get_queryset()
  
  
  class CustomQuerySetManager(Manager):
      """
      A manager that uses a custom QuerySet class. If you access a property that
      doesn't exist on the manager, it will attempt to proxy to the queryset. This
      behavior is consistent with methods like ``all()``, ``filter()`` and
      ``exclude()`` which are also available via the manager.
  
      Example::
  
          class MyCustomQS(QuerySet):
              def current(self):
                  return self.exclude(start_time__gt=now) \
                          .exclude(end_time__lt=now)
  
          class MyModel(models.Model):
              objects = CustomQuerySetManager(MyCustomQS)
  
          m = MyModel.objects.get(pk=1)
          m.objects.all().current()  # Access the ``current()`` method of the queryset
          m.objects.current()  # Also works!
  
      """
      def __init__(self, queryset_class, *args, **kwargs):
          self.queryset_class = queryset_class
          super(CustomQuerySetManager, self).__init__(*args, **kwargs)
  
      def __getattr__(self, attr):
          qs = self.get_query_set()
          try:
              return getattr(qs, attr)
          except AttributeError:
              raise
  
      def get_queryset(self):
          return self.queryset_class(self.model, using=self._db)
  
      def get_query_set(self):
          return self.get_queryset()
  
new_contents: from django.db.models import Manager
  
  
  class FilteredManager(Manager):
      def __init__(self, **kwargs):
          self.filter_args = kwargs
          super(FilteredManager, self).__init__()
  
      def get_queryset(self):
          return super(FilteredManager, self).get_queryset() \
                  .filter(**self.filter_args)
  
      def get_query_set(self):
          return self.get_queryset()
  
  
  class CustomQuerySetManager(Manager):
      """
      A manager that uses a custom QuerySet class. If you access a property that
      doesn't exist on the manager, it will attempt to proxy to the queryset. This
      behavior is consistent with methods like ``all()``, ``filter()`` and
      ``exclude()`` which are also available via the manager.
  
      Example::
  
          class MyCustomQS(QuerySet):
              def current(self):
                  return self.exclude(start_time__gt=now) \
                          .exclude(end_time__lt=now)
  
          class MyModel(models.Model):
              objects = CustomQuerySetManager(MyCustomQS)
  
          m = MyModel.objects.get(pk=1)
          m.objects.all().current()  # Access the ``current()`` method of the queryset
          m.objects.current()  # Also works!
  
      """
      def __init__(self, queryset_class, *args, **kwargs):
          self.queryset_class = queryset_class
          super(CustomQuerySetManager, self).__init__(*args, **kwargs)
  
      def __getattr__(self, attr):
          qs = self.get_query_set()
          try:
              return getattr(qs, attr)
          except AttributeError:
              raise
  
      def get_queryset(self):
          return self.queryset_class(self.model, using=self._db)
  
      def get_query_set(self):
          return self.get_queryset()
  
subject: fix super object call