ruby on rails - subdomain routing -

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When a user types in their username.example.com, then I read subdomains and present the user personal page

map.home ",: Controller => 'User',: action = & gt; 'Show'

The problem is that I now want to add custom subdomains like www, '', help and so on.

What I do now but does not work: I read subdomains in the application controller and when I help, redirect the controller to help. Redirect does not work because the application controller calls again and I end up in the eternal loop.

Does anyone know how I face it?

Thanks

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