def post_save_callback(self, sender, **kwargs):
instance = kwargs['instance']
created = kwargs['created']
if not created:
key = self._get_key_for_instance(instance)
before = self.cache.pop(key, None)
if before:
after = serialize_instance(instance)
diff = self._compare_dicts(before, after)
if diff:
model_changed.send(sender, instance=instance,
raw=kwargs.get('raw'),
using=kwargs.get('using'), changes=diff)
else:
model_added.send(sender, instance=instance, raw=kwargs.get('raw'),
using=kwargs.get('using'))
def on_model_added(sender, **kwargs):
record_trail('add', kwargs.get('instance', None),
serialize_instance(kwargs.get('instance')))
def pre_save_callback(self, sender, **kwargs):
instance = kwargs['instance']
value = serialize_instance(instance, before=True)
if value:
key = self._get_key_for_instance(instance)
self.cache[key] = value
