gistfile1.sh

#!/bin/bash
#
# some oddities with rails constant lookup
#
# "Foo::Bar" will return the toplevel constant "Bar" the first time it is referenced
# and fail the second time.
#
# (if Foo is a class instead of a module, the second call will print a warning and 
# not raise a NameError)
#

RP=/tmp/tmp_rails

rm -rf $RP
rails $RP > /dev/null
cd $RP
cat <<EOF > app/models/bar.rb
class Bar
  def self.hello
    puts "should never be printed"
  end
end
EOF

./script/console <<EOF
module Foo
end

Foo::Bar.hello   # this returns the toplevel constant without printing a warning
Foo::Bar.hello   # this does fail
EOF

# prints:
#
# >> Foo::Bar.hello
# should never be printed
# >> Foo::Bar.hello
# NameError: uninitialized constant Foo::Bar
# 	from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:445:in `load_missing_constant'
# 	from /Library/Ruby/Gems/1.8/gems/activesupport-2.2.2/lib/active_support/dependencies.rb:77:in `const_missing'
# 	from (irb):5

gistfile2.txt