Andrej Lacko

not need to help, the mistake was I wrapped with this constraint "rule" all routes, when I included this only to begining of file everything worked fine.

Hello, this is my code (similar to yours but its non www/ or non www.domain.sk to that domain) :

constraints(:host => /^(?!www.domain\.sk)/i) do
match "/(*path)" => redirect { |params, req| "http://www.domain.sk/#{params[:path]}" }, via: :all

I run the app on heroku and have all other domains with and without subdomain pointed to www.domain.sk with CNAME DNS. When I type any domain combination it redirects me properly to www.domain.sk, but the application shows error. Dont you know where might be the problem? Is it heroku or rails specific error?