不使用Rake运行Rake任务

Question

我有一个应用程序，用户可以在其中相互下注，当结果加载到应用程序中时，我使用Rake任务来结算赌注。我在Heroku上运行，所以我每半小时就会使用他们的计划服务来完成这个Rake任务。

这可以很好地工作，但我更希望在数据库中保存/更新结果时运行Rake作业。

我如何转换Rake任务，以便可以在我的模型中运行它，可能如下所示。如果我可以从控制器运行它也会很好，因为我可能会有几种需要结算过程的情况。

class Spotprice < ActiveRecord::Base
  belongs_to :spotarea
  belongs_to :product

  after_save   :settlement
end

我的Rake任务现在看起来像这样：

task :settlement => :environment do
  puts "Settlement in progress..."
  puts "-------------------------"
  puts " "
  puts " "
  puts "BETS:"
  puts "-------------------------"

  # Bet settlement
  @bets = Bet.where(:settled => false)

  @bets.find_each do |bet|

    if not bet.choice.spotprice.nil?

      case 
      when bet.choice.spotprice.value > bet.choice.value && bet.buy == true
        profitloss  = 10
        puts "#{bet.id}: Win (1)"
      when bet.choice.spotprice.value < bet.choice.value && bet.buy == false 
        profitloss  = 10
        puts "#{bet.id}: Win (2)"
      when bet.choice.spotprice.value > bet.choice.value && bet.buy == false
        profitloss  = -10
        puts "#{bet.id}: Loose (3)"
      when bet.choice.spotprice.value < bet.choice.value && bet.buy == true 
        profitloss  = -10
        puts "#{bet.id}: Loose (4)"
      when bet.choice.spotprice.value == bet.choice.value
        profitloss  = -10
        puts "#{bet.id}: Loose (5)"
      end

      if profitloss  
        bet.settled    = true
        bet.profitloss = profitloss 
        bet.save
      end 

    end

    if bet.choice.settled == true
      bet.choice.settled = false
      bet.choice.save
    end

  end

  # Pusher update
  Pusher["actives"].trigger("updated", {:message => "Settlement completed"}.to_json)

end

Answer 1

只是把我对原始问题的评论放到一个答案中。

我有一个类似的情况，我有一个rake任务，我想从rake外部调用它。您想要做的是将代码从rake任务移到ruby类中，最好的位置是在lib中。您的类将如下所示：

# lib/settlement.rb
class Settlement
  def self.settle_bets
    # all the code that used to be in the rake task
  end
end

然后在代码中，你可以这样做(随机例子)：

# app/controllers/bets_controller.rb
#...
  def settle_bets
    require "settlement"
    Settlement.settle_bets
  end
# ...

或者(另一个随机的例子)：

# app/models/bet.rb
class Bet ...
  after_update: update_some_bets

  # ... more code here

  private
    def update_some_bets
      require "settlement"
      Settlement.settle_bets
    end

如果你愿意，你仍然可以使用rake任务：

# lib/tasks/settlement.task
require "settlement"
# require "#{Rails.root}/lib/settlement.rb" # use this if the above won't work

task :settlement => :environment do
  Settlement.settle_bets
end

Answer 2

如果想要在更新(或保存)时计算结果，为什么不将大部分代码从rake任务移到Bet模型的方法中，然后调用after_update回调

在bet.rb中

# class method that settles the given bet
def self.settle(bet)
  message = nil
  if not bet.choice.spotprice.nil?
    case 
    when bet.choice.spotprice.value > bet.choice.value && bet.buy == true
      profitloss  = 10
      message =  "#{bet.id}: Win (1)"
    when bet.choice.spotprice.value < bet.choice.value && bet.buy == false 
      profitloss  = 10
      message =  "#{bet.id}: Win (2)"
    when bet.choice.spotprice.value > bet.choice.value && bet.buy == false
      profitloss  = -10
      message =  "#{bet.id}: Lose (3)"
    when bet.choice.spotprice.value < bet.choice.value && bet.buy == true 
      profitloss  = -10
      message =  "#{bet.id}: Lose (4)"
    when bet.choice.spotprice.value == bet.choice.value
      profitloss  = -10
      message =  "#{bet.id}: Lose (5)"
    end

    if profitloss  
      bet.settled    = true
      bet.profitloss = profitloss 
      bet.save
    end 
  end

  if bet.choice.settled == true
    bet.choice.settled = false
    bet.choice.save
  end
  # return message
  message
end

在spot_price.rb中

class SpotPrice
  after_update Bet.settle(self)
  after_save   Bet.settle(self)

  ....
end

这不会处理其他输出中的Pusher内容(保存在message变量中并返回)。此外，我无法控制自己，但我认为你的意思是“失败”，而不是“松散”。

这就是你要找的吗？