如何在ruby模塊中連接flash [：notice]？

Question

我模塊mangopay_helper.rb

module MangoPayHelper 

    def transfer_to_contractor(contract, client, contractor) 
    amount = contract.amount * 0,1.to_i 
    begin 
    MangoPay::Transfer.create({ 
     Tag: "#{contract.id} + #{contract.title}", 
     AuthorId: client.mangopay_id, 
     DebitedFunds: {Currency: "EUR", Amount: contract.amount}, 
     Fees: { Currency: 'EUR', Amount: amount}, 
     DebitedWalletId: client.wallet_id, 
     CreditedWalletId: contractor.wallet_id 
    }) 
    rescue MangoPay::ResponseError => e 
    flash[:notice] = " Code: #{ e['Code'] } Message: #{ e['Message'] }" 
    end 
    end 
end 

在控制器的動作我叫MangoPayHelper.transfer_to_contractor。

Error: undefined local variable or method `flash' for MangoPayHelper:Module 

如何在紅寶石模塊中連接閃存？

Answer 1

你可以（也應該）讓控制器處理flash哈希的操作。

module MangoPayHelper 
    def self.transfer_to_contractor!(contract, client, contractor) 
    amount = contract.amount * 0,1.to_i 

    MangoPay::Transfer.create({ 
     Tag: "#{contract.id} + #{contract.title}", 
     AuthorId: client.mangopay_id, 
     DebitedFunds: {Currency: "EUR", Amount: contract.amount}, 
     Fees: { Currency: 'EUR', Amount: amount}, 
     DebitedWalletId: client.wallet_id, 
     CreditedWalletId: contractor.wallet_id 
    }) 
    end 
end 

---

class TransfersController < ApplicationController 
    def create 
    # [...] 
    begin 
     MangoPayHelper.transfer_to_contractor!(contract, client, contractor) 
    rescue MangoPay::ResponseError => e 
     flash[:notice] = " Code: #{ e['Code'] } Message: #{ e['Message'] }" 
    end 
    # [...] 
    end 
end 

Answer 2

首先，撥打MangoPayHelper.transfer_to_contractor與你的代碼不應該工作，因爲你有def transfer_to_contractor - 你需要def self.transfer_to_contractor使它可以這樣調用。

flash是一種控制器方法。爲了使它可以從模塊中調用，您可以在控制器中使用include模塊，然後調用方法transfer_to_contractor而不是MangoPayHelper.transfer_to_contractor。當你包含一個模塊時，模塊可以訪問包含者的方法，如flash。

例如，

class SomeController < ApplicationController 
    include MongoPayHelper 
    def my_route 
    transfer_to_controller(some args) 
    etc 
    end 
end