truncate method incompatible with Ruby 1.8.7

With rails > 2.2 and ruby 1.8.7 we can find this error using rails truncate helper

undefined method `length' for  Enumerable::Enumerator:0x7f44da230548>

To solve this problem paste the below code in environment.rb (EOF)



module ActionView
module Helpers
module TextHelper
 def truncate(text, length = 30, truncate_string = "...")
   if text.nil? then return end
   l = length - truncate_string.chars.to_a.size
   (text.chars.to_a.size > length ? text.chars.to_a[0...l].join + truncate_string : text).to_s
 end
end
end
end