I think signals will be easier, if you also want to record delete
information of a record, you can also hook pre_delete, the pseudo code
is:
from django.db.models import signals
def pre_save(sender, instance, signal, *args, **kwargs):
if instance.id: #update
state = 'change'
old_record = serder.objects.get(id=instance.id) #because the
instance has been changed, so you should get the unchanged record
first
result = #compre old_record and instance
else:
state = 'add'
result = #format instance
WriteLog(state, result)
def pre_delete(sender, instance, signal, *args, **kwargs):
state = 'delete'
result = #format instance
WriteLog(state, result)
dispatcher.connect(pre_save , signal=signals.pre_save)
dispatcher.connect(pre_delete , signal=signals.pre_delete)
--
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