让ferret支持中文分词

GENERIC_ANALYSIS_REGEX = /([a-zA-Z]|[\xc0-\xdf][\x80-\xbf])+|[0-9]+|[\xe0-\xef][\x80-\xbf][\x80-\xbf]/
GENERIC_ANALYZER = Ferret::Analysis::RegExpAnalyzer.new(GENERIC_ANALYSIS_REGEX, true)
acts_as_ferret({:fields => [ YOUR FIELDS ] }, { :analyzer => GENERIC_ANALYZER })