myblog.md

MyBlog

rails new myblog
rails generate scaffold Post title:string body:text && rails db:migrate
rails generate migration AddPublishedFlagToPosts published:boolean && rails db:migrate
rails generate job publish_posts_job

posts_controller.rb

def index
  @posts = Post.where(published: true)
end

publish_posts_job.rb

class PublishPostsJob < ApplicationJob
  queue_as :default

  after_perform :repeat

  def perform
    # Find an unpublished post
    @post = Post.where(published: false).sample

    # Publish it
    @post.update(published: true)
  end

  private
    def repeat
      self.class.set(wait: 5.hours).perform_later
    end
end

Start the first job

% rails console
irb(main):001:0> PublishPostsJob.perform_now