[FIX] website_event_online: take visitor informations from registration time asc

When computing phone and email of a visitor based on its linked registrations
take first registration values as more important. Indeed we think first encoded
registrations have a better chance to be accurate than the last ones.

Task ID-2169118
odoo/odoo#55967
odoo/enterprise#12438

X-original-commit: e983336b2e89101f6123c15848f59a8b8c111342

addons/website_event_online/models/website_visitor.py

@@ -43,7 +43,7 @@ class WebsiteVisitor(models.Model):
         self.flush()
 
         for visitor in self.filtered(lambda visitor: not visitor.email or not visitor.mobile):
-            linked_registrations = visitor.event_registration_ids.sorted('create_date', reverse=True)
+            linked_registrations = visitor.event_registration_ids.sorted(lambda reg: (reg.create_date, reg.id), reverse=False)
             if not visitor.email:
                 visitor.email = next((reg.email for reg in linked_registrations if reg.email), False)
             if not visitor.mobile: