How to make a drop down list in activeadmin?

Question

Ruby on Rails

Hello!
I have a Posts and Languages ​​table (it's just a list of languages). The language_name field (from Posts) is associated with a foreign key to the name field (from the Language table).
How can I make it so that when adding a new post, the language_name field looks like a select from those languages ​​that are available? For now, I just have it as an input field.

Answer 1

Perhaps this will help
And it is better to use Rails Admin. Everything works there by default and looks more modern.