How to implement this relationship in Django?

Question

Django

I’m new to Django and I immediately propose a scheme

In App 1, all connections work well, namely, what I needed was RequestInline TabularInline
Question: how can I do the same functionality in App 2, i.e. I also need to display RequestInline in the App2 admin panel TabularInline having contract_id field in Rzi model

Answer 1

Contract
  name = Text

ServiceName
  name = Text

Request
  contract = ForeignKey(Contract)
  service = ManyToMany(ServiceName)

RZI
  contract = ForeignKey(Contract)