Hello.

This is my problematic: When a user join a specific group, I need to
automatically remove it from another group.

But I can't find how.

When you add a record on "res.groups" with an "implied_ids" field, you
can do a:

<record id="group_guest" model="res.groups">
…
<field name="implied_ids"
eval="[(3, ref('my_group'))],"/>
…
</record>

But, this didn't remove the user from the group "my_group" when she/he
join the group "group_guest". This only remove the implication that
joining the "group_guest" make the user also join "my_group".


Is my only solution is to override res.groups or res.user write()
method?