Setting up Rails or Heroku to use Pry
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- With the pry-rails plugin (Rails3, 4+ only) - recommended
- With Pry in your Gemfile
- Without Pry in your Gemfile
- Rails 3.2+ fix
- With ~/.irbrc file
- On Heroku
This page will show you how to configure your Rails application to use Pry instead of IRB.
With the pry-rails plugin (Rails3, 4+ only) - recommended
This is a gem which causes
rails console to open
pry as well as
integrating with the Rails framework to provide additional features to
enhance your experience, such as commands like
Add this line to your gemfile:
gem 'pry-rails', :group => :development
bundle install and enjoy!
See the pry-rails project page for more information.
With Pry in your Gemfile.
Add the following as a initializer - it provides you with access to the entire Rails stack, and all the useful Rails3 console helpers. After the initializer is in place, you can go ahead and load the console normally using
MyApplication::Application.configure do # Use Pry instead of IRB silence_warnings do begin require 'pry' IRB = Pry rescue LoadError end end end
Without Pry in your Gemfile.
to use pry with a rails application without adding a 'pry' dependency to your Gemfile you can copy&paste
this code to
$RAILS_APP/.pryrc. the helper methods rails provides to IRB(like
reload!) are also made
available inside pry. this works as a replacement to
rails console or
./script/console but does not allow you to start pry at runtime inside a rails application. you can start pry with a rails app loaded at a shell by calling '$ pry' inside the working directory of a rails app.
rails = File.join Dir.getwd, 'config', 'environment.rb' if File.exist?(rails) && ENV['SKIP_RAILS'].nil? require rails if Rails.version[0..0] == "2" require 'console_app' require 'console_with_helpers' elsif Rails.version[0..0] == "3" require 'rails/console/app' require 'rails/console/helpers' else warn "[WARN] cannot load Rails console commands (Not on Rails2 or Rails3?)" end end
A minor fix needed on Rails 3.2+
You may find that the console helpers (
reload! et al.) are missing from pry in Rails 3.2+ if you are not using the
pry-rails gem. As a workaround, add something like this to your
if defined?(Rails) && Rails.env extend Rails::ConsoleMethods end
With ~/.irbrc file
This approach simply piggy-backs on IRB.
If you're using a Gemfile, you should add
gem 'pry', :group => :development to it.
This technique is discussed in more depth here.
- Just add the lines below into your ~/.irbrc file.
begin require "pry" Pry.start exit rescue LoadError => e warn "=> Unable to load pry" end
Heroku users with Rails apps, do not need to do this, this method is reserved for people using Sinatra or EM as their framework. For Rails you simply need to add pry-rails and pry to your Gemfile, bundle install and then push and run
heroku run console and it will load pry with your Rails environment as expected since Heroku can detect Rails apps and is designed to work well with them
Heroku w/ a Sinatra or EM app.
To convince Heroku to use Pry as the console instead of IRB add
gem 'pry' to your Gemfile and create a file called pry with.
#!/usr/bin/env ruby # To launch push this into your Git then do: # heroku run console pry # heroku console pry require 'pry' pry
After you have the above, commit it and push it, and then you can do
heroku run console pry If you would like to shortcut it (because you are forgetful or otherwise) you can create a file called heroku in your home folder bin (make sure to change the path to your gem bin unless you are on Ubuntu 11.04+ or Debian unstable+) with the following:
#!/usr/bin/env bash # chmod +x set -e if [ "$2" == "console" ]; then exec /usr/local/bin/heroku run console pry else /usr/local/bin/heroku $@ fi