Ruby on Rails模型文件中的IBAN驗證

Question

我正在嘗試與任何國家/地區iban代碼一起執行iban驗證。我從構建代碼的stackoverflow獲得了一些幫助，但仍然存在一些問題，我不知道它在哪裏。

總是我得到'這不是有效的IBAN'錯誤消息。但有時候我嘗試了正確的iban代碼作爲定義的國家。

請問有沒有人幫我做這個驗證的代碼？

的代碼是在這裏：

class BankAccount < ActiveRecord::Base 
    belongs_to :user 

    validates :bank_name, presence: true 
    validate :iban, :valid_iban?, presence: true 

    private 

    def valid_iban? 
      ibans = iban.upcase.scan(/\w/).join 

      ibans = ibans.gsub(/_/, '') 

      iban_length = ibans.length 

      country = ibans.scan(/\A../).join 

      length_correct_for_country = true 

      case country 
       when "IE" 
        if iban_length == 22 
         length_correct_for_country = true 
        else 
         length_correct_for_country = false  
        end 
       when "AL" 
        if iban_length == 28 
         length_correct_for_country = true 
        else 
         length_correct_for_country = false  
        end 
       when "TR" 
        if iban_length == 26 
         length_correct_for_country = true 
        else 
         length_correct_for_country = false  
        end 
       when "GB" 
        if iban_length == 22 
         length_correct_for_country = true 
        else 
         length_correct_for_country = false  
        end 
       when "VG" 
        if iban_length == 24 
         length_correct_for_country = true 
        else 
         length_correct_for_country = false  
        end 
      end 

      first_four_characters = ibans.slice!(0..3) 

      reordered_number = ibans + first_four_characters 

      letters_removed = [] 
      reordered_number.scan(/./) do |character| 
       case character 
       when "A" 
        letters_removed << 10 
       when "9" 
        letters_removed <<9 
       end 
      end 

      letters_removed = letters_removed.join.to_i 

      remainder = letters_removed % 97 

      if remainder == 1 && length_correct_for_country 

      else 
       remainder = remainder.to_s 
       errors.add(:iban, " That is not a valid IBAN. The IBAN that is being supplied") 
      end 

    end 

end 

Answer 1

的iban-tools寶石可用於這一目的，它工作得很好。

要在Rails中使用gem，我推薦編寫一個驗證器類。

首先把這個在您的Gemfile：

gem 'iban-tools' 

和運行bundle。

然後創建一個新的目錄app/validators和內部的一個名爲iban_validator.rb這些內容：

require 'iban-tools' 

class IbanValidator < ActiveModel::Validator 
    def validate(record) 
    unless IBANTools::IBAN.valid?(record.iban) 
     record.errors.add :iban, record.errors.generate_message(:iban, :invalid) 
    end 
    end 
end 

在把這個模型類：

validates_with IbanValidator 

Answer 2

你可能需要類似：

validate :valid_iban? 

def valid_iban? 

end