openbackloggery/collection/games/signals.py

from games.models import Timeline


def game_saved(sender, instance, created, raw, using, update_fields,
               **kwargs):
    """
    Add timeline entry.
    If game is created, add 2 timlines: 1 with CREATED status. The other with
    current object status.
    """
    # FIXME: don't write a timeline if previous have same title and object_id
    entry = {
        'item': instance,
        'status': instance.status,
    }
    # Add CREATED status if Game was created
    if created is True:
        new_entry = dict(entry)
        new_entry.update({'status': instance.CREATED})
        Timeline.objects.create(**new_entry)
    # Add new timeline entry ONLY if status is difference from CREATED one
    if instance.status != instance.CREATED:
        Timeline.objects.create(**entry)