ebrugulec

> Post.unscoped.order("updated_at desc").limit(10)
  Post Load (1.9ms)  SELECT `posts`.* FROM `posts` ORDER BY updated_at desc LIMIT 10

ebrugulec

> Post.order("updated_at desc").limit(10)
  Post Load (17.3ms)  SELECT `posts`.* FROM `posts` WHERE `posts`.`published` = 1 ORDER BY created_at desc, updated_at desc LIMIT 10

ebrugulec

> Post.limit(10)
  Post Load (3.3ms)  SELECT `posts`.* FROM `posts` WHERE `posts`.`published` = 1 ORDER BY created_at desc LIMIT 10

ebrugulec

describe '#delete' do
    before do
      9.times { create(:customer, type: 'anonym') }
      Timecop.freeze(time_parse('01:00'))
      load Rails.root.join("lib/tasks/delete_customers.rake")
      Rake::Task.define_task(:environment)
    end

    after do
      Timecop.return

ebrugulec

namespace :delete do
  desc 'delete customers for cron job'
  task customers: :environment do
    customers = Customer.all
    puts "#{customers.count} customers were deleted."
    customers.destroy_all
  end
end

ebrugulec

set :output, {
    error: '/log/cron_error_log.log',
    standard: '/log/cron_log.log' }

every 1.day, :at => '01:00 am' do
  rake "delete:customers"
end

ebrugulec

class Picture < ApplicationRecord
  belongs_to :imageable, polymorphic: true
end

ebrugulec

class Product < ApplicationRecord
  has_many :pictures, as: :imageable 
end

ebrugulec

class Employee < ApplicationRecord
  has_many :pictures, as: :imageable
end

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class CreatePictures < ActiveRecord::Migration[5.1]
  def change
    create_table :pictures do |t|
      t.string :title
      t.references :imageable, polymorphic: true, index: true

      t.timestamps
    end
  end
end