Question

我有一个类，其实例变量由哈希组成。

需要'hashie'

class CardBrandFees < Hashie::Trash
  property :assessments, from: :assessmentss
  attr_reader :discover, :visa, :mastercard, :mc_high_ticket, :assessments, :APF

  def initialize(ticket)
    @ticket          = @ticket
    @discover        = {:assessments => 0.00105, :APF => 0.0195}
    @visa            = {:assessments => 0.00110, :APF => 0.0195}
    @mastercard      = {:assessments => 0.00110, :APF => 0.0195}
    @mc_high_ticket  = {:assessments => 0.00010}
  end
end

我想制作一个卡片品牌对象，并能够通过点符号访问这些哈希值，所以：

cardbrand = CardBrandFees.new(ticket)
cardbrand.discover.assessments => 0.00105

我很难完成这个，并且不确定它甚至是设置这个简单课程的最有效方法，我已经尝试了哈希，但是不能让它工作，有没有人有这种情况的简单解决方案？

Answer 1

require 'ostruct'

class CardBrandFees
  attr_reader :discover, :visa, :mastercard, :mc_high_ticket, :assessments, :APF

  def initialize(ticket)
    @ticket         = ticket
    @discover       = OpenStruct.new(:assessments => 0.00105, :APF => 0.0195)
    @visa           = OpenStruct.new(:assessments => 0.00110, :APF => 0.0195)
    @mastercard     = OpenStruct.new(:assessments => 0.00110, :APF => 0.0195)
    @mc_high_ticket = OpenStruct.new(:assessments => 0.00010)
  end
end


p CardBrandFees.new("ticket").discover.assessments # => 0.00105
p CardBrandFees.new("ticket").mastercard.APF # => 0.0195

为使用静态哈希的实例变量创建读取方法

1 个答案: