Log once off jobs and enqueue on `db:migrate`

app/jobs/onceoff.rb

@@ -0,0 +1,25 @@
+class Jobs::Onceoff < Jobs::Base
+  sidekiq_options retry: false
+
+  def self.name_for(klass)
+    klass.name.sub(/^Jobs\:\:/, '')
+  end
+
+  # Pass `force: true` to force it happen again
+  def execute(args)
+    job_name = self.class.name_for(self.class)
+
+    if args[:force] || !OnceoffLog.where(job_name: job_name).exists?
+      execute_onceoff(args)
+      OnceoffLog.create(job_name: job_name)
+    end
+  end
+
+  def self.enqueue_all
+    ObjectSpace.each_object(Class).select { |klass| klass < self }.each do |klass|
+      job_name = name_for(klass).underscore.to_sym
+      Jobs.enqueue(job_name)
+    end
+  end
+
+end

app/jobs/onceoff/grant_emoji.rb

@@ -1,10 +1,8 @@
 module Jobs
 
-  class GrantEmoji < Jobs::Base
-    sidekiq_options retry: false
-
-    def execute(args)
+  class GrantEmoji < Jobs::Onceoff
 
+    def execute_onceoff(args)
       to_award = {}
 
       Post.secured(Guardian.new).visible.public_posts.find_in_batches(batch_size: 5000) do |group|

app/models/onceoff_log.rb

@@ -0,0 +1,2 @@
+class OnceoffLog < ActiveRecord::Base
+end

db/migrate/20160407180149_create_onceoff_logs.rb

@@ -0,0 +1,10 @@
+class CreateOnceoffLogs < ActiveRecord::Migration
+  def change
+    create_table :onceoff_logs do |t|
+      t.string :job_name
+      t.timestamps null: false
+    end
+
+    add_index :onceoff_logs, :job_name
+  end
+end

lib/tasks/db.rake

@@ -7,6 +7,8 @@ end
 task 'db:migrate' => ['environment', 'set_locale'] do
   SeedFu.seed
 
+  Jobs::Onceoff.enqueue_all
+
   SiteSetting.last_vacuum = Time.now.to_i if SiteSetting.last_vacuum == 0
 
   if SiteSetting.vacuum_db_days > 0 &&
@@ -82,7 +84,7 @@ task 'db:rebuild_indexes' => 'environment' do
       begin
         puts index_name
         User.exec_sql("DROP INDEX public.#{index_name}")
-      rescue ActiveRecord::StatementInvalid => e
+      rescue ActiveRecord::StatementInvalid
         # It's this:
         # PG::Error: ERROR:  cannot drop index category_users_pkey because constraint category_users_pkey on table category_users requires it
         # HINT:  You can drop constraint category_users_pkey on table category_users instead.
@@ -94,7 +96,7 @@ task 'db:rebuild_indexes' => 'environment' do
       index_definitions[table_name].each do |index_def|
         begin
           User.exec_sql(index_def)
-        rescue ActiveRecord::StatementInvalid => e
+        rescue ActiveRecord::StatementInvalid
           # Trying to recreate a primary key
         end
       end