[RUBY] What to do when Rails on Docker does not reflect controller changes in the browser


Changes to controller.rb are not reflected in the browser. It will be reflected if you restart the container, but it takes time to restart every time.


Windows 10 home Docker for Windows Rails 6.1 Ruby 2.7


In config \ environments \ development.rb Modify config.file_watcher = ActiveSupport :: EventedFileUpdateChecker to the following code.

config.file_watcher = ActiveSupport::FileUpdateChecker

What i don't understand

You can also solve it by writing the code below. I couldn't tell the difference from the above code by looking at the Rails guide, so if anyone can understand the difference, I would appreciate it if you could teach me.

config.reload_classes_only_on_change = false

See also: Rails Guide-Setting up Rails applications (https://railsguides.jp/configuring.html)


  1. Rails 5 doesn't reflect model and controller modifications
  2. Resolved the phenomenon that code changes are not reflected in development of Vagrant + Rails
  3. [Rails 6] Source code is not reflected unless Docker container is restarted

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