Question

我正在使用rails构建活动应用。对于付款流程，我使用Stripe和一些javascript来更新金额。我希望用户能够指定他们希望支付的空间数量（数量），并为此更新他们需要支付的总金额。我正在使用的代码是更新应付总金额的文本，但它没有更新服务器，因此每次我进行测试付款时，只收集一个金额。因此，如果一个事件每个空间花费10英镑，我尝试输入，比如4个空格（40英镑），当我进行测试时，Stripe只收集了10英镑。我需要确保正确传递数量参数。

这是我的预订页码 -

new.booking.html.erb

    <div class="col-md-6 col-md-offset-3" id="eventshow">
  <div class="row">
    <div class="panel panel-default">
        <div class="panel-heading">
            <h2>Confirm Your Booking</h2>
        </div>



                <%= simple_form_for [@event, @booking], id: "new_booking" do |form| %>

                 <div class="calculate-total">
                              <p>
                                  Confirm number of spaces you wish to book here:
                                    <input type="number" placeholder="1"  min="1" value="1" class="num-spaces">
                              </p>
                                <p>
                                    Total Amount
                                    £<span class="total" data-unit-cost="<%= @event.price %>">0</span>
                                </p>
                          </div>



                 <span class="payment-errors"></span>

                <div class="form-row">
                    <label>
                      <span>Card Number</span>
                      <input type="text" size="20" data-stripe="number"/>
                    </label>
                </div>

                <div class="form-row">
                  <label>
                  <span>CVC</span>
                  <input type="text" size="4" data-stripe="cvc"/>
                  </label>
                </div>

                <div class="form-row">
                    <label>
                        <span>Expiration (MM/YYYY)</span>
                        <input type="text" size="2" data-stripe="exp-month"/>
                    </label>
                    <span> / </span>
                    <input type="text" size="4" data-stripe="exp-year"/>
                </div>
            </div>
            <div class="panel-footer">    

               <%= form.button :submit %>


            </div> 

<% end %>
<% end %>

      </div>
  </div>
</div>  

<script type="text/javascript">
    $('.calculate-total input').on('keyup change', calculateBookingPrice);

function calculateBookingPrice() {
  var unitCost = parseFloat($('.calculate-total .total').data('unit-cost')),
      numSpaces = parseInt($('.calculate-total .num-spaces').val()),
      total = (numSpaces * unitCost).toFixed(2);

  if (isNaN(total)) {
    total = 0;
  }

  $('.calculate-total span.total').text(total);


}

  $(document).ready(calculateBookingPrice)

</script>

这是我的控制器代码，数量为参数 -

bookings_controller.rb

    def new
    # booking form
    # I need to find the event that we're making a booking on
    @event = Event.find(params[:event_id])
    # and because the event "has_many :bookings"
    @booking = @event.bookings.new(quantity: params[:quantity])
    # which person is booking the event?
    @booking.user = current_user
    #@total_amount = @event.price * @booking.quantity


end

def create

    # actually process the booking
    @event = Event.find(params[:event_id])
    @booking = @event.bookings.new(booking_params)
    @booking.user = current_user

        if 
            @booking.reserve
            flash[:success] = "Your place on our event has been booked"
            redirect_to event_path(@event)
        else
            flash[:error] = "Booking unsuccessful"
            render "new"
        end
end

booking.rb

   class Booking < ActiveRecord::Base

    belongs_to :event
    belongs_to :user

    validates :total_amount, presence: true, numericality: { greater_than: 0 }
    validates :quantity, :total_amount, presence: true


    def reserve
        # Don't process this booking if it isn't valid
        self.valid?

        # We can always set this, even for free events because their price will be 0.
        #self.total_amount = booking.quantity * event.price

                # Free events don't need to do anything special
                if event.is_free?
                save!

                # Paid events should charge the customer's card
                else

                    begin
                        self.total_amount = event.price * self.quantity
                        charge = Stripe::Charge.create(
                            amount: total_amount * 100,
                            currency: "gbp",
                            source: stripe_token, 
                            description: "Booking created for amount #{total_amount}")
                        self.stripe_charge_id = charge.id
                        save!
                    rescue Stripe::CardError => e
                    errors.add(:base, e.message)
                    false
                end
            end 

    end
end

如何修改此值以正确收集总金额？

这是我的开发日志的输出 -

   Started POST "/events/25/bookings" for ::1 at 2016-10-06 18:57:42 +0100
Processing by BookingsController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"qHYjvqAqNORnpBKjk4KdQ4++X53Av1KVO+BVIWkq0asLbyd8ssEJKFFcvR9CQHwc+UdAM041gpO3ZFlz0t7o9Q==", "quantity"=>"2", "booking"=>{"stripe_token"=>"tok_191g7l2hHbuHRh0YjftQP0eC"}, "event_id"=>"25"}
  [1m[36mUser Load (0.1ms)[0m  [1mSELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1[0m  [["id", 2]]
  [1m[35mEvent Load (0.2ms)[0m  SELECT  "events".* FROM "events" WHERE "events"."id" = ? LIMIT 1  [["id", 25]]
  [1m[36m (0.1ms)[0m  [1mbegin transaction[0m
  [1m[35mSQL (0.3ms)[0m  INSERT INTO "bookings" ("stripe_token", "event_id", "user_id", "total_amount", "stripe_charge_id", "created_at", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?)  [["stripe_token", "tok_191g7l2hHbuHRh0YjftQP0eC"], ["event_id", 25], ["user_id", 2], ["total_amount", 1], ["stripe_charge_id", "ch_191g7m2hHbuHRh0YGAZhmxIu"], ["created_at", "2016-10-06 17:57:43.430265"], ["updated_at", "2016-10-06 17:57:43.430265"]]

Answer 1

我认为输入标记中缺少name参数。试试下面的一个。

puts params[:quantity]

并检查服务器中是否接收到具有正确值的数量参数。

可能在控制器的create方法中使用UNCOMPRESS()。

Rails - 如何确保参数正确更新

1 个答案: