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from django.db.models.signals import post_delete
from reversion.models import Version
def update_nb_version_on_version_delete(sender, instance, **kwargs):
pk = instance.object_id
ct = instance.content_type
obj = ct.get_object_for_this_type(pk=pk)
# Make sure we have a new coherent value
obj.nb_versions = len(Version.objects.get_for_object(obj))
obj.save()
def enable_update_nb_version():
post_delete.connect(update_nb_version_on_version_delete, sender=Version)
