[Rails] How to properly implement nested form/field functionality?

Question

Ruby on Rails

There is an application that provides for filling in the "Phone Number" field. There may be several numbers.
On the view, phone numbers are displayed in different places.
What is the correct way to fill in this field?
I understand it is good practice to make a separate model. But after all not to create for each new such field model.
Model one. Field :phone

Answer 1

ActiveRecord has an array serialization into one column in the DBMS
. But if you need to have access to each phone separately (delete, change, search, etc.), then it is much more convenient to have a separate model