Ruby on rails 我想在rails中从001开始编号
在预订课上,我指定了从哪个开始。代码是这样的Ruby on rails 我想在rails中从001开始编号,ruby-on-rails,Ruby On Rails,在预订课上,我指定了从哪个开始。代码是这样的 class Booking < ActiveRecord::Base MAGIC_NUMBER = 001 # order ref start from 001 to add some obscurity def generate_ref_sequence count = Booking.new_today.count self.ref = "#{market}#{Date.today.strftime("%y%m%d")}
class Booking < ActiveRecord::Base
MAGIC_NUMBER = 001 # order ref start from 001 to add some obscurity
def generate_ref_sequence
count = Booking.new_today.count
self.ref = "#{market}#{Date.today.strftime("%y%m%d")}#{"%d" % (MAGIC_NUMBER+count+1)}"
end
生成序列时没有错误。但我想要131220009港币,但我得到1312209港币。我想生成001,002,003,然后010,011,012,然后099,然后100,然后101。。。。依此类推。将%d更改为%03d将解决您的问题
或者,您可以使用%s和MAGIC_NUMBER+count+1.to_us.rjust3,“0”%03d%1使用此选项可根据需要格式化数字