ActiveJob

Question

运行bundle exec rake jobs:work

后，我收到以下错误消息

  使用NoMethodError

失败（0次尝试之前）：未定义的方法`post_it＆＃39; ＃Class：0x00000003375e80＆gt;

class PostCreationJob < ActiveJob::Base
  queue_as :default

  def perform(user_id, string, url)
    Message.post_it(user_id, string, url)
  end
end

class Message < ActiveRecord::Base

  def post_it(id, string, url)
    scraper = ForumScraper.new
    scraper.tpt_login(id)
    scraper.make_post(string, url) 
  end      
end

class MessagesController < ApplicationController

   def create
     @message = Message.new(message_params)
     @message.save
     PostCreationJob.perform_later(@message.user_id, @message.string, @message.url)
     redirect_to :back
     flash[:info] = "Posts are being processed."
   end
end

我使用的是Rails 4.2.5

application.rb
require File.expand_path('../boot', __FILE__)
require 'rails/all'
Bundler.require(*Rails.groups)

module Workspace
  class Application < Rails::Application
    config.active_record.raise_in_transactional_callbacks = true
    config.active_job.queue_adapter = :delayed_job
  end
end

Answer 1

post_it方法被定义为实例方法，但是当你调用Message.post_it时，你将它称为类方法，因此在类上找不到该方法并引发no方法异常。如果您将post_it定义为def self.post_it，则可以作为类方法从类中访问它。