2007/4/20, Jason McVetta <[EMAIL PROTECTED]>:
> I need to add real audit trail and change-notification support to an
> existing Django app and to one that is under development. The best way to
> do this, it seems to me, is to add audit support to the Django framework
> itself. My requirements are similar to those named by Paul Childs in his
> django-users post last June:
>
Here is what I have quickly done with signals (I don't know if it can
be helpful):
## signals.py
from django.contrib.admin.models import LogEntry, ADDITION, CHANGE, DELETION
from django.contrib.contenttypes.models import ContentType
""" Those functions allow application logging.
It's a bit ugly to declare instance hidden variables (pre) but we need to be
sure that the save/delete is effective (post) before logging it.
PROTO: For the moment, it used the admin LogEntry model which is not really
safe given the fact that django admin will be changed soon to include newforms.
TODO: Add diff in change_message argument of LogEntry when this is a CHANGE.
"""
def log_pre_save(sender, instance, signal):
try:
initial_object = sender.objects.get(id=instance.id)
instance._action_flag = CHANGE
except sender.DoesNotExist:
instance._action_flag = ADDITION
def log_post_save(sender, instance, signal):
LogEntry.objects.log_action(
user_id=instance.user.id,
content_type_id=ContentType.objects.get_for_model(sender).id,
object_id=instance.id,
object_repr=str(sender.objects.get(id=instance.id)),
action_flag=instance._action_flag)
def log_pre_delete(sender, instance, signal):
instance._object_repr = str(sender.objects.get(id=instance.id))
def log_post_delete(sender, instance, signal):
LogEntry.objects.log_action(
user_id=instance.user.id,
content_type_id=ContentType.objects.get_for_model(sender).id,
object_id=instance.id,
object_repr=instance._object_repr,
action_flag=DELETION)
## todo/models.py
from sibiocle.misc.signals import log_pre_save, log_post_save,
log_pre_delete, log_post_delete
[...]
dispatcher.connect(log_pre_save, signal=signals.pre_save, sender=Todo)
dispatcher.connect(log_post_save, signal=signals.post_save, sender=Todo)
dispatcher.connect(log_pre_delete, signal=signals.pre_delete, sender=Todo)
dispatcher.connect(log_post_delete, signal=signals.post_delete, sender=Todo)
Anyway, I'm really intersted in your work, let us know your progression ;-).
Regards,
David
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