I was getting this error, and it turns out it’s just that builder isn’t installed. sudo gem install builder, and you’re fixed.

/Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- blankslate (MissingSourceFile)
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from ./vendor/rails/activerecord/lib/../../activesupport/lib/active_support/basic_object.rb:21
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from ./vendor/rails/activerecord/lib/../../activesupport/lib/active_support/duration.rb:1
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'
	from ./vendor/rails/activerecord/lib/../../activesupport/lib/active_support/core_ext/time/calculations.rb:1
	 ... 18 levels...
	from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require'

This entry was posted on Tuesday, May 12th, 2009 at 11:43 am and is filed under Programming. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.