Rails 常用代码
to_json

ActiveRecord::Base.include_root_in_json = true
konata.to_json(:methods => :permalink)
# => {"id": 1, "name": "Konata Izumi", "age": 16,
"created_at": "2006/08/01", "awesome": true,
"permalink": "1-konata-izumi"}



rails g

 def strip_tail_zero(number)    number = number.to_s    if number =~ /\./      number = number.gsub(/0+$/, "")    end    number.gsub(/\.$/, "")  end[/java]