Question

My question is this, I have my postgres database called gas_stations and only has a field called name, and I need that the form shows all the data in combobox from the table. also one of the options should appear “new station” and the truth I don’t know how to do this

Answer 1

I think you tale about table and not database. To do this, you must to create a model called GasStation like this :

class GasStation < ActiveRecord::Base
end

After that, you could create a list in your view like this :

select("gas_station", "name", GasStation.all.collect {|gs| [ gs.name, gs.id ] }, { :include_blank => true })

See the guide here : http://guides.rubyonrails.org/getting_started.html.