Question

所以我跟着这个Balanced Payments tutorial，并尝试调整他们的付款模式以适合我的应用程序。

原件：

class Payment

  def initialize(email, amount, credit_card_hash)
    @email = email
    @amount = (amount * 100).to_i
    @credit_card_hash = credit_card_hash
    @buyer = nil
    @card = nil
    @errors = []
  end

end

我的简化版本（更新了完整模型的代码）：

require 'balanced'

class Transaction < ActiveRecord::Base

  attr_reader :errors, :amount

  def initialize(amount)
    @amount = (amount * 100).to_i
    @buyer = nil
    @card = nil
    @errors = []
  end

    def charge
      begin
        find_or_create_buyer
        debit_buyer
        credit_owner
        return true
      rescue
        return false
      end
    end

  private    

  def find_or_create_buyer
      begin
        @buyer = current_user.balanced_customer
      rescue
        @errors << 'Your account is invalid'
      end
  end

  def debit_buyer
    begin
      payment = @buyer.debit(@amount, "Test transaction")
    rescue
      @errors << 'Your credit card could not be charged'
    end
  end

  def credit_owner
    begin
      Balanced::Marketplace.my_marketplace.owner_account.credit(amount)
    rescue
      @errors << 'Your credit card payment did not go through.'
    end
  end


end

问题是我每次尝试从rails控制台实例化类时都会遇到纯粹的ruby错误，

> payment = Transaction.new(0.01)
 output error: #<NoMethodError: undefined method `has_key?' for nil:NilClass>

我用谷歌搜索过，但未能得到一个好的答案。

有什么想法吗？

Answer 1

在活动记录初始化中，使用属性哈希来完成初始化程序

http://blog.hasmanythrough.com/2007/1/22/using-faux-accessors-to-initialize-values

Answer 2

嗯，这似乎可以阻止错误，不管我到底做了什么。

不确定这是否会在以后出现任何问题，我们会看到。

  def initialize(args = {})
    super
    @my_cache = {}
    @amount = args[:amount]
    @buyer = nil
    @card = nil
    @errors = []
  end

Ruby类初始化错误 - 未定义方法'has_key？'

2 个答案: