delayed_job：'未定义方法'错误时使用handle_asynchronously [英] delayed_job: 'undefined method' error when using handle_asynchronously

问题描述

我试图使用delayed_job来运行一个更大的csv导入到我的rails数据库。这是我的控制器和模型方法：

控制器方法

  def import 
 InventoryItem.import（params [：file]，params [：store_id]）
 redirect_to vendors_dashboard_path，通知：已导入库存。 
 end 
  

模型方法

  def self.import（file，store_id）
 CSV.foreach（file.path，headers：true）do | row | 
 inventory_item = InventoryItem.find_or_initialize_by_upc_and_store_id（row [0]，store_id）
 inventory_item.update_attributes（：price => row.to_hash [price]，：updated_at =>＃{Time.now }）
 end 
 end 
 
 handle_asynchronously：import 
  

我已将'delayed_job'和'daemons'添加到我的gemfile，然后捆绑。运行生成器，用 rake jobs：work 启动一个开发工作进程，然后尝试通过应用程序运行导入。这是我得到的错误：

 路由错误
未定义方法`import'类`InventoryItem'
  

整合delayed_job时，我错过了什么吗？这个导入过程运行得很好，所以只是想知道我在哪里搞砸了。提前感谢！

解决方案

您的导入是一个类方法，您应该在模型类名称的singleton类上调用handle_asynchronously： p>

您可以使用metaclass技巧来对类方法进行别名：

  class< ;& self 
 def import（file，store_id）
 CSV.foreach（file.path，headers：true）do | row | 
 inventory_item = InventoryItem.find_or_initialize_by_upc_and_store_id（row [0]，store_id）
 inventory_item.update_attributes（：price => row.to_hash [price]，：updated_at =>＃{Time.now }）
 end 
 end 
 handle_asynchronously：import 
 end 
  

$ b b

希望这有助于！

I'm attempting to use delayed_job to run a larger csv import into my rails database. Here are my controller and model methods:

controller method

def import
    InventoryItem.import(params[:file], params[:store_id])
    redirect_to vendors_dashboard_path, notice: "Inventory Imported."
end

model method

def self.import(file, store_id)
CSV.foreach(file.path, headers: true) do |row|
inventory_item = InventoryItem.find_or_initialize_by_upc_and_store_id(row[0], store_id)
inventory_item.update_attributes(:price => row.to_hash["price"], :updated_at => "#{Time.now}")
    end
end

handle_asynchronously :import

I've added 'delayed_job' and 'daemons' to my gemfile, then bundled. Ran the generator, started a development worker process with rake jobs:work, and then tried to run an import through the app. Here's the error I get:

Routing Error
undefined method `import' for class `InventoryItem'

Did I miss something when integrating delayed_job? This import process ran fine prior, so just wondering where I've messed up. Thanks in advance!

解决方案

Your import is a class method, you should call handle_asynchronously on your model class name's singleton class:

You can use the metaclass trick to alias class methods:

class << self
   def import(file, store_id)
     CSV.foreach(file.path, headers: true) do |row|
      inventory_item = InventoryItem.find_or_initialize_by_upc_and_store_id(row[0], store_id)
      inventory_item.update_attributes(:price => row.to_hash["price"], :updated_at => "#{Time.now}")
     end
   end
  handle_asynchronously :import
end

Hope this helps!

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