pre_remove and post_remove "actions" not sent via m2m_changed signalling?

Hi all,

http://dpaste.org/1vhf6/ 

With the following models.py, and the output seen further

down, can anyone explain why pre_remove and post_remove

"actions" are not happening when I remove an item from

a M2M relation?  class Interface(models.Model):     name = models.CharField('Interface',                             primary_key=True,                             max_length=80)  class Netgroup(models.Model):     name = models.CharField('Netgroup',                             primary_key=True,                             max_length=80)      interfaces = models.ManyToManyField(Interface,                                         null=True,                                         blank=True)      def __unicode__(self):         return self.name  from django.db.models.signals import m2m_changed  def tester(sender, **kwargs):     action = kwargs['action']     instance = kwargs['instance']     pk_set = kwargs['pk_set']     model = kwargs['model']     fd = open('/tmp/m2m.log', 'a+')     fd.write('%s on %s pk_set of %s is %s\n' % (action, instance, model, str(pk_set)))     fd.close()  m2m_changed.connect(tester, dispatch_uid="whatever")  #=============================================================== # # IN ADMIN UI: Removed 'barley.foo.org' from jbtest2 which

#              had 4 interfaces (and then has 3, correctly)

# #              Logs the following...

#

#              Where's the "remove" actions? # #===============================================================  pre_clear on instance jbtest2: pk_set of <class 'hostdb.models.Interface'> is None post_clear on instance jbtest2: pk_set of <class 'hostdb.models.Interface'> is None pre_add on instance jbtest2: pk_set of <class 'hostdb.models.Interface'> is set([u'babylon.foo.org', u'ape.foo.org', u'baker.foo.org']) post_add on instance jbtest2: pk_set of <class 'hostdb.models.Interface'> is set([u'babylon.foo.org', u'ape.foo.org', u'baker.foo.org']) 

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