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Home/ Questions/Q 6146159
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Editorial Team
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Editorial Team
Asked: May 23, 20262026-05-23T18:54:25+00:00 2026-05-23T18:54:25+00:00

I am trying to run my app in heroku but I get this error

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I am trying to run my app in heroku but I get this error when trying to signup or even access devise’s login page:

ActionController::RoutingError (uninitialized constant User::UsersController)

Is this a devise bug or a server setting i missed in heroku?

I am running a rails3.1 app in a cedar stack by the way and loading the index page is good, but if I try to login or sign up, it blows.

The signup form DOES show, but when I submit, that’s when it blows. I checked the logs and it did POST to the controller but GETting the resulting page(when redirected I guess) blows it up.

Any help?

EDIT

here are my routes:

root :to => "home#index"

devise_for :users

namespace :user do
  root :to => "users#welcome"
end

resources :users, :only => :show

A heroku support person also asked about my routes but why does it happen in production only? Also I don’t think there’s any problem with the routes…is there?

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  1. Editorial Team
    Editorial Team
    2026-05-23T18:54:26+00:00Added an answer on May 23, 2026 at 6:54 pm

    This is your problem:

    namespace :user do
      root :to => "users#welcome"
    end
    

    Can you remove this?

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