belongs_to relationship doesn't work as Rails association. We should update the child model parentID manually when parent model sync with backend. It doesn't trigger any type of updates in child model.
Then what does the belongs_to do?
According to what little documentation I could find
Rhom has a
belongs_towhich you can use to trigger updates on sync-enabled models. This is useful where you have relationships between backend service objects.
This leads me to believe it does trigger something. I am just trying to figure out what it triggers and how it is used.