[FIX] calendar: fix virtual ids present when recomputing models

Issue

	- Install Calendar, HR Recruitment & Studio
	- Go into Calendar
	- Create a recurring event
	- Edit it with Studio
	- Add a related field
	- Select Applicant > Assigned

	Traceback

Cause

	Applicant > Assigned is a stored field.
	Adding a stored field seems to triggers
	something that recomputes all models

	odoo/odoo:odoo/modules/registry.py@12.0#L307

	Then it calls the _write method of models.py
	which uses self.ids (which contains virtuals ids)
	for a SQL query.

	odoo/odoo:odoo/models.py@12.0#L3428

Solution

	Avoid all the virtuals ids to be retrieved
	when we have "update_custom_fields" in
	the context.

OPW-2214170

closes odoo/odoo#48208

X-original-commit: 112f976eb193020c093068fd30a004be3f5e9254
Signed-off-by: Jason Van Malder (jvm) <jvm@odoo.com>

addons/calendar/models/calendar.py

@@ -1751,7 +1751,9 @@ class Meeting(models.Model):
                 new_arg = (arg[0], arg[1], get_real_ids(arg[2]))
             new_args.append(new_arg)
 
-        if not self._context.get('virtual_id', True):
+        # update_custom_fields: context used by the ORM to check if custom fields (studio) should be updated
+        virtual_id_fallback = not self._context.get('update_custom_fields')
+        if not self._context.get('virtual_id', virtual_id_fallback):
             return super(Meeting, self)._search(new_args, offset=offset, limit=limit, order=order, count=count, access_rights_uid=access_rights_uid)
 
         if any(arg[0] == 'start' for arg in args) and \