How to implement a selection of rows from the first table based on the WHERE of the second table?

Question

Ruby on Rails

The title is muddled. I'll explain now.
There are three models - News, NewsAndUser and User.
You need to display news that has such and such a user_id. user_id is passed through the address bar.
How to implement it?

Answer 1

guides.rubyonrails.org/active_record_querying.html...