old_contents: from types import ClassType
  
  from django.db import models
  from django.db.models.manager import Manager
  from django.db.models.query import QuerySet
  
  class QueryManager(models.Manager):
      def __init__(self, *args, **kwargs):
          if args:
              self._q = args[0]
          else:
              self._q = models.Q(**kwargs)
          super(QueryManager, self).__init__()
  
      def order_by(self, *args):
          self._order_by = args
          return self
  
      def get_query_set(self):
          qs = super(QueryManager, self).get_query_set().filter(self._q)
          if hasattr(self, '_order_by'):
              return qs.order_by(*self._order_by)
          return qs
  
  
  def manager_from(*mixins, **kwds):
      '''
      Returns a Manager instance with extra methods, also available and
      chainable on generated querysets.
  
      (By George Sakkis, originally posted at
      http://djangosnippets.org/snippets/2117/)
  
      :param mixins: Each ``mixin`` can be either a class or a function. The
          generated manager and associated queryset subclasses extend the mixin
          classes and include the mixin functions (as methods).
  
      :keyword queryset_cls: The base queryset class to extend from
          (``django.db.models.query.QuerySet`` by default).
  
      :keyword manager_cls: The base manager class to extend from
          (``django.db.models.manager.Manager`` by default).
      '''
      bases = [kwds.get('queryset_cls', QuerySet)]
      attrs = {}
      for mixin in mixins:
          if isinstance(mixin, (ClassType, type)):
              bases.append(mixin)
          else:
              try: attrs[mixin.__name__] = mixin
              except AttributeError:
                  raise TypeError('Mixin must be class or function, not %s' %
                                  mixin.__class__)
      # create the QuerySet subclass
      id = hash(mixins + tuple(kwds.iteritems()))
      qset_cls = type('Queryset_%d' % id, tuple(bases), attrs)
      # create the Manager subclass
      bases[0] = kwds.get('manager_cls', Manager)
      attrs['get_query_set'] = lambda self: qset_cls(self.model, using=self._db)
      manager_cls = type('Manager_%d' % id, tuple(bases), attrs)
      return manager_cls()
  
new_contents: from types import ClassType
  
  from django.db import models
  from django.db.models.manager import Manager
  from django.db.models.query import QuerySet
  
  class QueryManager(models.Manager):
      def __init__(self, *args, **kwargs):
          if args:
              self._q = args[0]
          else:
              self._q = models.Q(**kwargs)
          super(QueryManager, self).__init__()
  
      def order_by(self, *args):
          self._order_by = args
          return self
  
      def get_query_set(self):
          qs = super(QueryManager, self).get_query_set().filter(self._q)
          if hasattr(self, '_order_by'):
              return qs.order_by(*self._order_by)
          return qs
  
  
  def manager_from(*mixins, **kwds):
      '''
      Returns a Manager instance with extra methods, also available and
      chainable on generated querysets.
  
      (By George Sakkis, originally posted at
      http://djangosnippets.org/snippets/2117/)
  
      :param mixins: Each ``mixin`` can be either a class or a function. The
          generated manager and associated queryset subclasses extend the mixin
          classes and include the mixin functions (as methods).
  
      :keyword queryset_cls: The base queryset class to extend from
          (``django.db.models.query.QuerySet`` by default).
  
      :keyword manager_cls: The base manager class to extend from
          (``django.db.models.manager.Manager`` by default).
      '''
      bases = [kwds.get('queryset_cls', QuerySet)]
      attrs = {}
      for mixin in mixins:
          if isinstance(mixin, (ClassType, type)):
              bases.append(mixin)
          else:
              try: attrs[mixin.__name__] = mixin
              except AttributeError:
                  raise TypeError('Mixin must be class or function, not %s' %
                                  mixin.__class__)
      # create the QuerySet subclass
      id = hash(mixins + tuple(kwds.iteritems()))
      qset_cls = type('Queryset_%d' % id, tuple(bases), attrs)
      # create the Manager subclass
      bases[0] = kwds.get('manager_cls', Manager)
      def _get_query_set(self):
          if hasattr(self, '_db'):
              return qset_cls(self.model, using=self._db)
          else:
              return qset_cls(self.model)
      attrs['get_query_set'] = _get_query_set
      manager_cls = type('Manager_%d' % id, tuple(bases), attrs)
      return manager_cls()
  
subject: make manager_from Django 1.1 compatible