Question

我在一个控制器中有多个操作，我想在我的一个操作中重用一些代码。所以我决定把它放在一个模型类方法中。遗憾的是，无法在视图中访问返回的变量。在这里你可以看到控制器动作（我调用的模型方法是check_bibip_prices）

def sold_to_winner
  @soldcars = Soldcar.winner_username(params[:winnerusername]).order("auctioncarenddate DESC").paginate(:page => params[:page], :per_page => 15)
  @page_name = "Cars Sold to: " + params[:winnerusername]

  render :index
  authorize! :show, @soldcars

  @car_buy_prices, @car_sell_prices, @car_status, @car_salesprice_background, @car_winnersalesprice_background = Soldcar.check_bibip_prices(@soldcars)
end

模型可以看作如下：

class Soldcar < ApplicationRecord
  belongs_to :bibipprice

  scope :isongoingauction, ->(isongoingauction) { where isongoingauction: isongoingauction }
  scope :winner_username, ->(winnerusername) { where(winnerusername: winnerusername) }

  def self.check_bibip_prices(soldcars)
    @car_buy_prices = {}
    @car_sell_prices = {}
    @car_status = {}
    @car_salesprice_background = {}
    @car_winnersalesprice_background = {}

    @soldcars.each do |car|
      if (car.paintbodydamage < 10) and (car.mechanicaldamage < 2)
        @car_status[car.carid] = "excellent"
        @car_buy_prices[car.carid] = car.bibipprice.dealer_price_three
        @car_sell_prices[car.carid] = car.bibipprice.estimated_price_three
      elsif (car.paintbodydamage < 18) and (car.mechanicaldamage < 5)
        @car_status[car.carid] = "good"
        @car_buy_prices[car.carid] = car.bibipprice.dealer_price_two
        @car_sell_prices[car.carid] = car.bibipprice.estimated_price_two
      else
        @car_status[car.carid] = "fair"
        @car_buy_prices[car.carid] = car.bibipprice.dealer_price_one
        @car_sell_prices[car.carid] = car.bibipprice.estimated_price_one 
      end

      if car.bibipprice.estimated_price_three > 0 
        if car.winnersalesprice > @car_sell_prices[car.carid]
          @car_winnersalesprice_background[car.carid] = "pricealert"
        elsif car.winnersalesprice > @car_buy_prices[car.carid]
          @car_winnersalesprice_background[car.carid] = "pricesoso"
        elsif car.winnersalesprice > 0
          @car_winnersalesprice_background[car.carid] = "priceok"
        end

        if car.salesprice > @car_sell_prices[car.carid]
          @car_salesprice_background[car.carid] = "pricealert"
        elsif car.salesprice > @car_buy_prices[car.carid]
          @car_salesprice_background[car.carid] = "pricesoso"
        else
          @car_salesprice_background[car.carid] = "priceok"
        end
      else
        @car_salesprice_background[car.carid] = ""
        @car_winnersalesprice_background[car.carid] = ""
      end
    end

    return @soldcarscar_buy_prices, @soldcarscar_sell_prices, @soldcarscar_status, @soldcarscar_salesprice_background, @soldcarscar_winnersalesprice_background 
  end
end

Answer 1

问题是您在调用render方法后实例化变量。

将render :index放在sold_to_winner方法的底部，它应该有效：

def sold_to_winner
  @soldcars = Soldcar.winner_username(params[:winnerusername]).order("auctioncarenddate DESC").paginate(:page => params[:page], :per_page => 15)
  @page_name = "Cars Sold to: " + params[:winnerusername]
  authorize! :show, @soldcars
  @car_buy_prices, @car_sell_prices, @car_status, @car_salesprice_background, @car_winnersalesprice_background = Soldcar.check_bibip_prices(@soldcars)
  render :index
end

Ruby on Rails：在其他多个操作中重用代码

1 个答案: