Rails 1.1 Console on Windows

March 30th, 2006

If you are like me, you develop your applications on Windows and deploy to Linux/Unix/FreeBSD, whatever.

On Rails 1.1, the console does not start anymore on Windows. It reports the following error:

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$ ruby script\console
Loading development environment.
c:/ruby/lib/ruby/1.8/irb/init.rb:151:in `parse_opts': undefined method `upcase' for nil:NilClass (NoMethodError)
        from c:/ruby/lib/ruby/1.8/irb/init.rb:19:in `setup'
        from c:/ruby/lib/ruby/1.8/irb.rb:54:in `start'
        from c:/ruby/bin/irb:13

There are two ways to fix this issue:

  1. Upgrade Ruby to 1.8.4, or
  2. Patch your vendor/rails/railties/lib/commands/console.rb to remove the “—prompt-mode single” option: 
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    Index: vendor/rails/railties/lib/commands/console.rb
===================================================================
--- vendor/rails/railties/lib/commands/console.rb       (revision 4097)
+++ vendor/rails/railties/lib/commands/console.rb       (working copy)
@@ -22,4 +22,4 @@
 else
   puts "Loading #{ENV['RAILS_ENV']} environment."
 end
-exec "#{options[:irb]} #{libs} --prompt-mode simple"
+exec "#{options[:irb]} #{libs}"

UPDATE (2006-03-30): Ah, I just found the reason why irb chokes. Richard Livsey’s script/console with edge Rails on Windows with 1.8.2

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I am François Beausoleil, a Ruby on Rails coder. During the day, I work on XLsuite. At night, I am interested many things. Read my biography

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