如何将子域重定向到 rails 路由中的新 url

Question

When I type mcca.example.com in url, it redirects me to ncca.example.com .

How do I make this redirect in rails routes?

constraints subdomain: "mcca" do
   get "/", to: redirect  { |params| root(subdomain: "ncca") }
end

This is what i have tried with.

Answer 1

With thanks to this question and answer

In Rails 4 and 5:

get '/mcca', to: redirect('/ncca') # or something like that based on your requirements.

In Rails 3:

You can redirect inside the routes.rb file. match "/mcca" => redirect(" http://example.com/ncca ")

Answer 2

You can use route constraints for handling subdomains. Have a look on the official Rails guides here

You may add this at the beginning of your routes.rb file:

get '/', to: 'welcome#index', constraints: { subdomain: 'mcca' }
get '/', to: 'ncca#index', constraints: {subdomain: 'ncca' }

then in a WelcomeController , at the end of an index action you can perform a substitution to the request url with:

def index
  ...
  redirect_to request.url.sub('mcca', 'ncca')
end