I have added two fields to res.partner called firma1 and firma2 and I use them on my address layout.

The problem is that I have to reenter firma1 and firma2 for every individual that belongs to the company, instead, it should just take the firma1 and firma2 field from the parent_id it belongs to.

I have thought about adding related fields to solve this problem, however, then they have different names?

Is there a way to overwrite the method every time someone accesses a field? Then I could check in that method if the partner is an individual and if so take the field from the parent?

What is the correct way to solve this?