Add and install delayed_cron_job gem

Gemfile

@@ -103,6 +103,7 @@ gem 'sinatra', git: 'https://github.com/sinatra/sinatra.git', require: false
 
 # Cron jobs
 gem 'delayed_job_active_record'
+gem 'delayed_cron_job'
 
 gem 'select2-rails'
 

Gemfile.lock

@@ -130,6 +130,8 @@ GEM
     debug_inspector (0.0.2)
     deep_cloneable (2.2.2)
       activerecord (>= 3.1.0, < 5.2.0)
+    delayed_cron_job (0.7.2)
+      delayed_job (>= 4.1)
     delayed_job (4.1.3)
       activesupport (>= 3.0, < 5.2)
     delayed_job_active_record (4.1.2)
@@ -701,6 +703,7 @@ DEPENDENCIES
   copy_carrierwave_file
   database_cleaner
   deep_cloneable (~> 2.2.1)
+  delayed_cron_job
   delayed_job_active_record
   devise
   dotenv-rails

db/migrate/20170926092716_add_cron_to_delayed_jobs.rb

@@ -0,0 +1,9 @@
+class AddCronToDelayedJobs < ActiveRecord::Migration[5.0]
+  def self.up
+    add_column :delayed_jobs, :cron, :string
+  end
+
+  def self.down
+    remove_column :delayed_jobs, :cron
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170926083816) do
+ActiveRecord::Schema.define(version: 20170926092716) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -174,6 +174,7 @@ ActiveRecord::Schema.define(version: 20170926083816) do
     t.string   "queue"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.string   "cron"
     t.index ["priority", "run_at"], name: "delayed_jobs_priority", using: :btree
   end