Question

我知道这是你不能在rails内部做的事情或者不应该这样做但我需要以某种方式获取用户在表单字段中输入的金额并使用该值。

这就是我的模型的样子

class Deposit < ActiveRecord::Base
  belongs_to  :credit_card
  belongs_to  :user

  validates   :credit_card,          presence: true
  validates   :user,                 presence: true
  validates   :tx_type,              inclusion: %w(debit credit)
  # validates   :amount,               presence: true, numericality: true

  before_create :add_transaction_to_merchant
  after_create  :update_user_balance
  attr_readonly :credit_card_id, :user_id, :fee_id, :tx_type, :status, :merchant_tx_id

  attr_accessible :tx_type, :amount, :status, :merchant_tx_id, :credit_card_id,
                  :user_id, :user

  def amount
    return attributes[:amount] if attributes[:amount]
    set_amount
  end

  def tx_type
    attributes[:tx_type] || 'debit'
  end

  def send_receipt
    Resque.enqueue(PaymentCompletedSender, self.id)
  end

  def update_user_balance
    user_balance =user.balance + set_amount
    user.balance = user_balance
    user.save
  end

  private

  def add_transaction_to_merchant
    set_amount
    return false if credit_card.nil?
    return true unless amount > 0
    result = Braintree::Transaction.sale(
      amount: amount,
      payment_method_token: credit_card.token,
      options: { submit_for_settlement: true }
    )

    if result.success?
      self.merchant_tx_id = result.transaction.id
      # status will be authorized or submitted_for_settlement
      self.status = result.transaction.status
    else
      errors.add(:base, result.message)
      if result.transaction.nil?
        # validation errors prevented transaction from being created
        logger.error(result.errors)
      else
        self.merchant_tx_id = result.transaction.id
        # status will be processor_declined, gateway_rejected, or failed
        self.status = result.transaction.status
      end
    end
  end

  def set_amount
    attributes[:amount]
  end

end

控制器：

# POST /deposits
  # POST /deposits.json
  def create
    @deposit = Deposit.new(params[:deposit])
    @deposit.user = current_user
    @deposit.credit_card = current_user.credit_cards.try(:first)

    binding.pry
    respond_to do |format|
      if @deposit.save
        format.html { redirect_to "/", notice: 'Deposit was successfully created.' }
        format.json { render json: @deposit, status: :created, location: @deposit }
      else
        format.html { render action: "new" }
        format.json { render json: @deposit.errors, status: :unprocessable_entity }
      end
    end
  end

这就是表格发送的参数

{"utf8"=>"✓",
 "authenticity_token"=>"r0M0sRr7QO9kl0IWrJSgvj45DFrC6mbbuA+ttgEaUI0=",
 "deposit"=>{"amount"=>"100"},
 "commit"=>"Pay Now"}

有关如何从模型中的表单返回金额值的任何想法？

Answer 1

你这样做对吗？ @deposit = Deposit.new(params[:deposit])如果您删除模型中的amount和set_amount方法，则应该只能在模型中使用amount或self.amount，以便以下内容够了

def add_transaction_to_merchant
  return false if credit_card.nil?
  return true unless amount > 0

  result = Braintree::Transaction.sale(
    amount: amount,
    payment_method_token: credit_card.token,
    options: { submit_for_settlement: true }
  )

在模型中访问Param

1 个答案: