Use reload! to reload your code changes
After making changes to your code, use reload! in the console to load the latest version without restarting the console.
Access the last executed command's result with _
The underscore variable stores the result of the last executed command.
> x = 1 => 1 > _ => 1
Search command history with Ctrl + R
(reverse-i-search)`x'x = 1
Toggle SQL logging
ActiveRecord::Base.logger.level = 1
Switch between the default 0 (log SQL) and 1 (silence SQL) to control query logging.
Access Rails view helpers with helper:
> helper.time_ago_in_words(3.days.ago)
=> "3 days"
> helper.link_to("Products", app.products_path)
=> "<a href=\"/products\">Products</a>"
Use app to access the Rails application context
> app.root_path => "/"
Sandbox your console session
Start console with --sandbox to rollback all database changes when you exit.
rails console --sandbox
Access consoles for different environments
By default, Rails loads the development environment. But you can access the production environment console like this:
rails console -e production
And test like this:
rails console -e test
Use puts for cleaner output
puts User.pluck(:email)
gives a cleaner output than just
User.pluck(:email)
Clear the console
Use Ctrl + L or Cmd + K on Mac and Linux.
Use system(cls) on Windows