[Python] how DRF undestand which field in serialazer.py is related to which model field?

imagine i have a super simple serializer.py file :


and i just want to use it ! nothing special .. so im going to write something like this (with a model class called "Product") & its going to work :

But how DRF undrstand which field in serializer.py file belongs to which field in the "Product" class in models file ? (i told DRF nothing about it !? + considering that the API Model != Data Model )

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