Django 3, How to take data from one table and add a record to another table?

Question

Django

For example, I have a table "Halls" in this table there are fields:
room_number,
how many_rows,
number_of_seats_in_row,
capacity * - this field is necessary, we do not pay attention to it


When adding a record, I want to take data from the fields ( how many_rows, number -in_places_in_row ) and with this data create records in the "Places" table, for example, if we have 5 rows and 20
places in a row, then we get 100 records in the "Places" table,

but how to do this automatically when adding a record to the "Halls" table, then it automatically takes this data and fills it in a cycle in the table "Places" the

table "Halls" is filled only in the admin panel, not in the view

How to implement this ??? somehow in admin.py ?

Answer 1

Write a signal handler that creates seats when the hall is created.