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Editorial Team
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Asked: 2026-06-16T01:59:29+00:00

Have a Ruby on Rails app that uses BCrypt to hash passwords, the User

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Have a Ruby on Rails app that uses BCrypt to hash passwords, the User model has 

require "BCrypt"

and the gemfile has

gem 'bcrypt-ruby'

This all works fine when running locally, however when I deploy it to my Heroku server I get the following error

2012-11-16T14:42:32+00:00 app[web.1]: Exiting
2012-11-16T14:42:32+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/application/finisher.rb:53:in `block in <module:Finisher>'
2012-11-16T14:42:32+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/engine.rb:436:in `eager_load!'
2012-11-16T14:42:32+00:00 app[web.1]: => Ctrl-C to shutdown server
2012-11-16T14:42:32+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:312:in `depend_on'
2012-11-16T14:42:32+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:225:in `require_dependency'
2012-11-16T14:42:32+00:00 app[web.1]: /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:317:in `rescue in depend_on': No such file to load -- BCrypt (LoadError)
2012-11-16T14:42:32+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/engine.rb:439:in `block (2 levels) in eager_load!'
2012-11-16T14:42:32+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `instance_exec'
...
2012-11-16T14:42:32+00:00 app[web.1]:   from script/rails:6:in `<main>'
2012-11-16T14:42:33+00:00 heroku[web.1]: Process exited with status 1
2012-11-16T14:42:33+00:00 heroku[web.1]: State changed from crashed to down
2012-11-16T14:42:33+00:00 heroku[web.1]: State changed from starting to crashed
2012-11-16T14:42:34+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=smartaprofiles.herokuapp.com fwd= dyno= queue= wait= connect= service= status=503 bytes=

I’m assuming the problem is the No such file to load -- BCrypt (LoadError) but can’t seem to fix it, bundle install and bundle update work fine and it says bcrypt-ruby is installed OK.
Any ideas how I could go about fixing this? I’m all out!

Thanks

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1 Answer

  1. Editorial Team

    Just posting this answer to help any others finding this page.
    The correct answer is in the comments to the question, by in @eugen.

    The problem was capitalisation, as I’m developing on Windows, it doesn’t care about capitalisation, but on the Heroku (UNIX) server it does, and I should have used ‘bcrypt’ instead of ‘BCrypt’.

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