Pursuant to this ancient post regarding irb history and completion, here is my current .irbrc, now sporting a custom “Rails” section to make my life on the Rails console easier.
require 'irb/completion'
require 'irb/ext/save-history'
IRB.conf[:SAVE_HISTORY] = 100
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-save-history"
IRB.conf[:PROMPT_MODE] = :SIMPLE
# Just for Rails...
if rails_env = ENV['RAILS_ENV']
rails_root = File.basename(Dir.pwd)
IRB.conf[:PROMPT] ||= {}
IRB.conf[:PROMPT][:RAILS] = {
:PROMPT_I => "#{rails_root}> ",
:PROMPT_S => "#{rails_root}* ",
:PROMPT_C => "#{rails_root}? ",
:RETURN => "=> %s\n"
}
IRB.conf[:PROMPT_MODE] = :RAILS
# Called after the irb session is initialized and Rails has
# been loaded (props: Mike Clark).
IRB.conf[:IRB_RC] = Proc.new do
ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Base.instance_eval { alias :[] :find }
end
end
I’m using the IRB.conf[:PROMPT] configuration option to create a custom Rails prompt that displays the current project name (which it assumes is the same as the PWD). Note that I’m also creating a convenience alias for AR::Base#find and enabling logging to STDOUT. Fun.
