In this tutorial you are going to learn how to pass extra data to your serializer, before saving it to the database. Introduction Example Using APIView Example Using ViewSet Introduction When using regular Django forms, there is this common pattern where we save the form with commit=False and then pass some extra data to the instance before saving it to the database, like this: form=InvoiceForm(request.POST)ifform.is_valid():invoice=form.save(commit=False)invoice.user=request.userinvoice.save...