- Create an event, add an attendee
- Click on the stat button 'Mail Attendees'
The domain is shown as 'Event', '?', [id].
This is because the domain selector widget doesn't support the `in`
operator. Supporting it is not trivial, since ultimately `field_utils`
cannot parse a list of ids for a Many2one. It's less intrusive to change
the domain, since a standard use of the method will simply contain a
single id.
opw-1878322
This commit removes the strange selection box based on a magic flag and
some strange methods returning a string. Instead just allow to send mass
mailing on all models inheriting from mail.thread using the is mail
thread flag.
Various addons are updated to remove the _mail_mass_mailing class
attribute used to determine mass mailing capability.
We consider people could send a mass mailing on every model inheriting
from mail.thread. It makes no sense to limit it to a given set of addons.
If the event has some attendees a button is displayed to launch a mass
mailing on those attendees. This button requires a new bridge module
between mass mailing and event.