Rails Background Job Conventions

A job's body is a thin adapter: fetch records by ID, delegate to a service, done. No business logic lives in the job class itself.

Jobs Delegate to Services

# Wrong — business logic inline in the job
class SendWeeklyDigestJob < ApplicationJob
  def perform(user_id)
    user = User.find(user_id)
    return if user.unsubscribed?
    posts = Post.published.where("created_at > ?", 1.week.ago)
    DigestMailer.weekly(user, posts).deliver_now
  end
end