def action_log_delete(sender, instance, **kwargs):
"""
Signal receiver that creates a log entry when a model instance is deleted from the database.
Direct use is discouraged, connect your model through :py:func:`actionslog.registry.register` instead.
"""
if instance.pk is not None:
changes = model_instance_diff(instance, None)
log_entry = LogAction.objects.create_log_action(
instance=instance,
action=LogAction.DELETE,
changes=json.dumps(changes),
)
def action_log_create(sender, instance, created, **kwargs):
"""
Signal receiver that creates a log entry when a model instance is first saved to the database.
Direct use is discouraged, connect your model through :py:func:`actionslog.registry.register` instead.
"""
if created:
changes = model_instance_diff(None, instance)
log_entry = LogAction.objects.create_log_action(
instance=instance,
action=LogAction.CREATE,
changes=json.dumps(changes),
)
def action_log_update(sender, instance, **kwargs):
"""
Signal receiver that creates a log entry when a model instance is changed and saved to the database.
Direct use is discouraged, connect your model through :py:func:`actionslog.registry.register` instead.
"""
if instance.pk is not None:
try:
old = sender.objects.get(pk=instance.pk)
except sender.DoesNotExist:
pass
else:
new = instance
changes = model_instance_diff(old, new)
# Log an entry only if there are changes
if changes:
log_entry = LogAction.objects.create_log_action(
instance=instance,
action=LogAction.UPDATE,
changes=json.dumps(changes),
)