invalid multibyte char (US-ASCII) ruby1.92011-03-17

ruby1.9+rails3在helper方法中写中文时,出现 invalid multibyte char (US-ASCII) 异常了,查了下,原来ruby1.9是用ASCII编码来读源码的,奇怪。
解决办法是在文件的第一行加上

# encoding: utf-8

rails3中确定application.rb中有:

# Configure the default encoding used in templates for Ruby 1.9.
config.encoding = "utf-8"

阅读下面的文章:

http://blog.grayproductions.net/articles/ruby_19s_three_default_encodings
http://blog.grayproductions.net/articles/understanding_m17n

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