Ruby on Rails

Hi there,

I'm upgrading an app from rails 4.2.7 to 5.0.4.

I have updated the binary files through this command $rails app:update, and so far so good.

However, when i run this command  $rails db:migrate, I get the following error:

rails aborted!

NoMethodError: undefined method `scheduler' 

and the code it points is to this block: (the red is what is causing the error.

if !defined?(Rails::Console) && \

    File.basename($0) != 'rake' && \

    Rails.configuration.scheduler

  scheduler_pid_file = File.join(Rails.root, "tmp", "scheduler.pid").to_s

  Scheduler::start_unless_running scheduler_pid_file

end

I'm using gem 'rufus-scheduler', '~> 3.4.2'

And I followed this guide to upgrade: https://hashrocket.com/blog/posts/how-to-upgrade-to-rails-5#3-update-rails-binaries-and-configurations

Do you have any idea how to solve this?

Thank you for your time,

João Bordalo