控制器对延迟作业的操作 [英] Controller Action to Delayed Job

问题描述

我正在上载制表符分隔的文档并在控制器中进行处理.一切正常，但是在大文件上可能要花费一些时间.我想将其移到delay_job上，该应用程序在我的应用程序中的其他位置上工作过，但是由于它在控制器中，因此无法以相同的方式调用.

I am uploading a tab-delimited document and processing in the controller. Everything works fine, but can take some time on a large file. I want to move this to a delay_job, which I have working elsewhere in my app, but as this is in the controller, cannot be called in the same way.

该表单调用process_file操作，该操作又调用salesupload操作.我应该如何将其转变为后台工作?

The form calls on the process_file action, which in turn calls on the salesupload action. How should I turn this into a background job?

class SalesController < ApplicationController

  def salesupload(file)
    uploaded_io = file.read
    numrows = "uploaded_io.size"
    FasterCSV.parse(uploaded_io, {:headers => true, :col_sep =>"\t"}).each do |row_data|
        full, upc, _discard, isrc = row_data[26].match(/^([^_]+)(_(.+))?/).to_a
          new_record = AppleSale.new(
              'provider' =>  row_data[0],
              'provider_country' => row_data[1],
              'vendor_identifier' => row_data[2]
          )
      new_record.save
    end
  end

    def process_file
        file = params[:apple_sale][:tsv_file]
        salesupload(file)
    end

end

推荐答案

当我必须执行此操作时，我发现控制器中定义的方法必须是类方法.我不记得为什么会这样，我认为这与拥有更明确的接收者有关.因此，我要做的是将salesupload方法设为类方法，然后在其上调用.delay.

I found when I had to do this that the method defined in the controller has to be a class method. I can't remember why this was, I think it had to do with having a more explicit receiver. So what I would do is make the salesupload method a class method, and then just call .delay on it.

def self.salesupload(files)
  # code
end

def process_file
  file = params[:apple_sale][:tsv_file]
  SalesController.delay.salesupload(file)
  head :no_content
end

您应该很好！我还通过AJAX调用了原始方法(在本例中为process_file)，然后附加了head :no_content，以便它返回某些内容而无需重定向或任何其他操作.

And you should be good to go! I also made my original method (process_file in this case) called via AJAX, and then I appended the head :no_content so that it returned something without needing a redirect or anything.

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