Just a quick one. Say you have a route like the following:

map.resources :users

And you’re using email addresses to look up users like:

/users/jim@somewhere.com

You’re going to run into an error along the lines of:

Missing template users/show.com.erb in view path blah/app/views

Which obviously isn’t what you want. To fix this, change your route to the following:

map.resources :users, :requirements => { :id => /.*/ }

Rejoice.

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