[schema migration] make some stuff to ease file 1.9 migration : we want to kill the Image entity so that existing image are turned into (existing entity type) File entities
.. -*- coding: utf-8 -*-
Les crochets (*hooks*)
======================
XXX FILLME
Les crochets sont appelés avant ou après la mise à jour d'une entité ou d'une
relations dans le dépot
Leur prototypes sont les suivants
* after_add_entity (session, entity)
* after_update_entity (session, entity)
* after_delete_entity (session, eid)
* before_add_entity (session, entity)
* before_update_entity (session, entity)
* before_delete_entity (session, eid)
* after_add_relation (session, fromeid, rtype, toeid)
* after_delete_relation (session, fromeid, rtype, toeid)
* before_add_relation (session, fromeid, rtype, toeid)
* before_delete_relation (session, fromeid, rtype, toeid)
* server_startup
* server_shutdown
* session_open
* session_close