{"id":7639,"date":"2016-02-19T16:05:45","date_gmt":"2016-02-19T16:05:45","guid":{"rendered":"https:\/\/dev.railscarma.com\/how-to-schedule-tasks-with-ruby-on-rails\/"},"modified":"2021-06-06T12:39:19","modified_gmt":"2021-06-06T12:39:19","slug":"how-to-schedule-tasks-with-ruby-on-rails","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/fr\/blog\/articles-techniques\/how-to-schedule-tasks-with-ruby-on-rails\/","title":{"rendered":"How to Schedule Tasks With Ruby on Rails"},"content":{"rendered":"
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Schedule Tasks With Ruby on Rails<\/h2>\n\u201cThere cannot be a crisis next week. My schedule is already full.\u201d This cheeky quote by Henry Kissinger explains the importance of having a schedule. In life or in tech, scheduling are important.\n\nWhen it comes to Ruby on Rails which prefers convention over configuration, a scheduler is a must. Scheduling job can be defined as \u201ca decision process of committing resources between varieties of tasks\u201d. It is basically a function enabling one to perform routine tasks as part of a sequence or during predefined time like performing maintenance operations on retrieving RSS feeds. These scheduled jobs which are performed in the background are executed by \u2018workers\u2019.\n\nSo what are the best ways to schedule a task in Rails environment? Usually, developers can use application specific cron jobs to run the tasks however, cron jobs are for scheduling things, not actually performing them. It also works well on a single server but in case you want to scale to multiple server, it doesn\u2019t work that good. They are also difficult to debug and are time consuming. So, how can you ensure that your scheduling works well and without any dependency or too much syntax. \u2018Whenever\u2019 comes to your rescue! Check out how \u2018whenever\u2019 gem can help you create cron jobs with Ruby.\n

What is Whenever gem?<\/h3>\nIt is used for writing and deploying corn jobs with clear syntax.\n

How to Install it?<\/h3>\n
gem ‘whenever’, :require => false<\/blockquote>\nAfter Installation We have to type \u201cwheneverize .\u201d in console.Then automatically this will create schedule.rb file inside the config folder.\n\nInside the schedule.rb file we can schedule the function based on time,date,month,etc..\n\nEx:\n
every 1.day, :at => ’10:00 am’ do\n\nrake “sow:events_reminder_mail”, :environment => :development\n\nend<\/blockquote>\nBefore scheduling the action Inside the lib folder we have to create one task folder, inside the task folder we can create rake file.That rake file name only we have to use for scheduling the action\n
rake “sow:events_reminder_mail”, —–> rake file name with task Name\n\n:environment => :development ——–> We have to specific the Environment<\/blockquote>\nInside the rake file we can give the condition and use User Mailier for sending the email.That User Malier will send the mail based on scheduling time,date,month,etc..\n\nEx:()\n
desc “Events Inactive”\n\ntask :events_inactive => :environment do\n\n@events = Event.where(:end_date=>Date.today-1.days)\n\n@events.each do |event|\n\nevent.update_attributes(:published_status=>false,:inactive_dat e=>Date.today)\n\nend\n\nend<\/blockquote>\nReference : https:\/\/github.com\/javan\/whenever\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Abonnez-vous pour les derni\u00e8res mises \u00e0 jour<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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