Question

使用Stripe并希望： 1.检查模型验证 2.如果没有错误处理卡令牌。 3.如果卡有效，则保存新记录。

下面我介绍它首先处理卡片，然后如果成功，则保存记录。不幸的是，该记录可能无法通过验证，但该卡已经收费。

作为一个黑客，我在视图中有一个js验证（镜像模型验证），不允许在满足条款之前提交表单。

Tourregistration.rb控制器

    def create
token = params[:tourregistration][:stripeToken]
begin
  charge = Stripe::Charge.create(
  :amount => (params[:tourregistration][:invoice].to_d*100).round,
  :currency => "usd",
  :source => token,
  :description => "Example charge"
  )
rescue Stripe::CardError => e
  # The card has been declined
  redirect_to :back, :notice => "#{e}"
else

@tourregistrations = tourregistration_data.map do |tourregistration_params|
  Tourregistration.new(tourregistration_params)
end

@tourregistrations.each(&:save)

  if @tourregistrations.all?(&:valid?)
    flash[:notice] = 'Sign-up Complete'
    redirect_to root_url
  else
    redirect_to :back, :notice => "Something went wrong. Please fill in all fields."  
  end    
end

端

Tourregistration.rb模型

class Tourregistration < ActiveRecord::Base
belongs_to :patron
belongs_to :tour
has_one :referrer

validates :fname, length: { minimum: 2}
validates :lname, length: { minimum: 2}
validates :email, presence: true
validates :price, presence: true
validates :invoice, presence: true
validates :patron_id, presence: true
validates :tour_id, presence: true
end

Answer 1

Other than callbacks, you can use a database transaction, for example :

ActiveRecord::Base.transaction do
  results = @tourregistrations.map(&:save) # validate and save the records
  raise ActiveRecord::Rollback if results.any?{|result| result == false } # rollback the transaction if any registration failed to be saved
  payment = charge_card # process the payment
  raise ActiveRecord::Rollback unless payment # rollback if payment failed
end

As a side note, this kind of logic is a textbook example for a service object.

保存rails之前检查验证

1 个答案: