RATIONALE
Channel model is a mail.thread enabled model behaving strangely with followers,
notifications and discuss. Its code should however be simplified to be more
self contained and avoid unwanted side effects on other models.
SPECIFICATIONS
Remove ``channel_ids`` argument and support from ``message_subscribe`` and
``message_unsubscribe`` API. Indeed we do not support adding channel-based
followers anymore. Only partners should be added or removed from followers.
It also allows to simplify API and understanding of both methods.
Various addons are updated to match the simplified (un)subscribe API. Some
enterprise addons may also be impacted.
LINKS
Task ID-2070632 (main task)
Task ID-2419762 (followup task)
COM PR odoo/odoo#62859
ENT PR odoo/enterprise#15172
UPG PR odoo/upgrade#2005
Thibault Delavallée
7991118bfe