Access parent record in formula field

Access parent record in formula field

Formula fields in CRM  are very useful. While I can use various functions on record's fields, I cannot seem to be able to access parent's record.

Example:
- I have a custom module Transactions and then a lookup field on Deals module allowing 1:many relations
- so from a a Transaction record standpoint Deal record is parent
-> I have a formula field in the Transactions module and want to access Deal.amount field of the parent record in the formula.

I don't think it's currently possible. Correct?

Perhaps the closest thing I can think of is a workaround via field of lookup on the child record, but that's not good enough because:
- I do not want to copy the data, i. e. I do not want to recreate the amount field on the Transaction record - it's a n unnecessary redundancy
- currently field of lookup is not synced: https://help.zoho.com/portal/en/community/topic/auto-sync-field-of-lookup-value

That makes me think that if accessing the parent in the formula field was possible, then field of lookup would not be necessary as a feature in first place :)

Wanted to double check anyway!