ruby on rails f.select options with custom attributes

Question

I have a form select statement, like this:

= f.select :country_id, @countries.map{ |c| [c.name, c.id] }

Which results in this code:

Answer 1

You could do this as follows:

= f.select :country_id, @countries.map{ |c| [c.name, c.id, { 'data-currency-code' => c.currency_code} ] }