utf 8 - Rails force input to encode in windows-1250 -

i'm making app on existing database in firebird charset windows-1250. , im getting lot of troubles because of encoding, cant change it.

my biggest error when im making form input object called notification this:

 form |f|   panel iconv.conv('windows-1250', 'utf-8', 'opis zgłoszenia:'),      :class=> 'panel_dodaj_new'       f.input :opis_zgloszenia, label:false     end  end 

try save text in utf-8, want save in windows-1250.
how force :opis_zgloszenia save in different charset utf-8?

i find way change encoding in controller.
in create method add:

@notification.opis_zgloszenia =  iconv.conv('windows-1250', 'utf-8', @notification.opis_zgloszenia) 

also need change update method:

if @notification.update(notification_params)     @notification.opis_zgloszenia = iconv.conv('windows-1250', 'utf-8', @notification.opis_zgloszenia)     if @notification.save       redirect_to request.url     end   end 

now works fine.