Basic vanilla Rails…
Your parent table (resort_basic?) should have an ID column.
All your child tables (like resort_contact?) should include a field
named resort_basic_id of type integer.
-> use a hidden field on the resort_contact form to store the
resort_basic_id, setting this value in the resort_contact controller’s
new method if the vlaue is known, then retrieve that from the params in
the create method
-> or the resort_contact form may include a droplist field where you
choose the resort_basic ID as part of creating the resort contact
-> or some other more advanced methods, but the nature of your question
leads me to believe that you should stick to the basics for now.
As for links:
There are tons of examples out there that don’t have to be repeated