Take a look at the LogEntry class which stores the log for the actions inside the admin.
You could use it like this to insert custom entries in the logs:
from settings import LOG_SIZE, LOG_THRESHOLD
from django.contrib.admin.models import LogEntry
if not LogEntry._meta.installed:
raise ImproperlyConfigured("You'll need to put 'django.contrib.admin' in your INSTALLED_APPS setting before you can use the admin application.")
def log_action(user_id, content_type_id, object_id, object_repr, action_flag, change_message=''):
# limit log size
log_count = LogEntry.objects.count()
if log_count > LOG_THRESHOLD:
to_delete = LogEntry.objects.all()[LOG_SIZE:log_count]
#FIXME (!?): to_delete.delete()
for d in to_delete:
d.delete()
LogEntry.objects.log_action(user_id, content_type_id, object_id, object_repr, action_flag, change_message)