Question

我有两个相关的模型 - Tour＆amp;保留。 Tour具有“amount”属性。我正在使用复选框来确定是否根据用户输入（复选框）更改金额。默认值设置为false。

目标：
我希望@tour.amount仅在选中任一复选框时进行更改。我有以下内容，但无论是否选中复选框，它都会收取额外的金额。我错过了什么？我尝试将参数比较为0，“0”，但无效。

if @reservation.update_attribute(:option1, params[:option1]) == true || @reservation.update_attribute(:option2, params[:option2]) == true
   @tour.amount = @tour.amount + 1500
else
   @tour.amount = @tour.amount
end

PARAMS：

Params (unchecked)
"option 1"=>"0", "option 2"=>"0"
Params (checked)
"option 1"=>"0", "option 2"=>"0"

控制器：

 def new
    @reservation = Reservation.new
    @tour = Tour.find(params[:tour_id])
  end

 def create
    @tour = Tour.find(params[:tour_id])
    @reservation = Reservation.new(reservation_params)

    if @reservation.update_attribute(:option1, params[:option1]) == true || @reservation.update_attribute(:option2, params[:option2]) == true
       @tour.amount = @tour.amount + 1500
    else
       @tour.amount = @tour.amount
    end

    if @reservation.save
      Stripe::Charge.create(
        :amount => @tour.amount, # amount in cents, again
        :currency => "usd",
        :card => params[:stripeToken]
      )
      flash[:success] = "Your reservation has been booked for #{@reservation.passengers} person(s). Please save this info."
      redirect_to new_tour_reservation_path(@tour)
    else
      render 'new'
    end
  end

解：（不要过分思考！）

if @reservation.option1 == true && @reservation.option2 == true
       @tour.amount = @tour.amount + 3000
    elsif @reservation.option1 == true
       @tour.amount = @tour.amount + 1500
    elsif @reservation.option2 == true
       @tour.amount = @tour.amount + 1500
    else
       @tour.amount = @tour.amount
    end

Answer 1

如果param为true或false，则检查update_attribute调用是否成功。

如何检查boolean是true还是false并更新值

1 个答案: