Remove explicit after_commit_action dependency

Appraisals

@@ -55,7 +55,9 @@ appraise 'rails_5.2' do
 end
 
 appraise 'norails' do
+  gem 'sqlite3', '~> 1.3', '>= 1.3.5', platforms: :ruby
   gem 'rails', install_if: false
+  gem 'after_commit_action', install_if: false
   gem 'sequel'
   gem 'redis-objects'
 end

Gemfile

@@ -4,3 +4,4 @@ gemspec
 
 gem 'sqlite3', '~> 1.3.5', :platforms => :ruby
 gem 'rails', '5.1.4'
+gem 'after_commit_action', '~> 1.0'

README.md

@@ -981,6 +981,12 @@ job.run
 job.save! #notify_about_running_job is not run
 ```
 
+Please note that `:after_commit` AASM callbacks behaves around custom implementation
+of transaction pattern rather than a real-life DB transaction. This fact still causes
+the race conditions and redundant callback calls within nested transaction. In order
+to fix that it's highly recommended to add `gem 'after_commit_action', '~> 1.0'` to your
+`Gemfile`.
+
 If you want to encapsulate state changes within an own transaction, the behavior
 of this nested transaction might be confusing. Take a look at
 [ActiveRecord Nested Transactions](http://api.rubyonrails.org/classes/ActiveRecord/Transactions/ClassMethods.html)

aasm.gemspec

@@ -17,7 +17,6 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 1.9.3'
 
   s.add_dependency 'concurrent-ruby', '~> 1.0'
-  s.add_dependency 'after_commit_action', '~> 1.0'
 
   s.add_development_dependency 'rake'
   s.add_development_dependency 'sdoc'

gemfiles/norails.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3", ">= 1.3.5", platforms: :ruby
 gem "rails", install_if: false
+gem "after_commit_action", install_if: false
 gem "sequel"
 gem "redis-objects"
 

gemfiles/rails_4.2.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "4.2.5"
+gem "after_commit_action", "~> 1.0"
 gem "nokogiri", "1.6.8.1", platforms: [:ruby_19]
 gem "mime-types", "~> 2", platforms: [:ruby_19, :jruby]
 gem "mongoid", "~> 4.0"

gemfiles/rails_4.2_mongoid_5.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "4.2.5"
+gem "after_commit_action", "~> 1.0"
 gem "mime-types", "~> 2", platforms: [:ruby_19, :jruby]
 gem "mongoid", "~> 5.0"
 gem "activerecord-jdbcsqlite3-adapter", "1.3.24", platforms: :jruby

gemfiles/rails_4.2_nobrainer.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "4.2.5"
+gem "after_commit_action", "~> 1.0"
 gem "nobrainer", "~> 0.33.0"
 
 gemspec path: "../"

gemfiles/rails_5.0.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "5.0.0"
+gem "after_commit_action", "~> 1.0"
 gem "mongoid", "~> 6.0"
 gem "sequel"
 gem "dynamoid", "~> 1.3", platforms: :ruby

gemfiles/rails_5.0_nobrainer.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "5.0.0"
+gem "after_commit_action", "~> 1.0"
 gem "nobrainer", "~> 0.33.0"
 
 gemspec path: "../"

gemfiles/rails_5.1.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "5.1"
+gem "after_commit_action", "~> 1.0"
 gem "mongoid", "~>6.0"
 gem "sequel"
 gem "dynamoid", "~> 1.3", platforms: :ruby

gemfiles/rails_5.2.gemfile

@@ -4,6 +4,7 @@ source "https://rubygems.org"
 
 gem "sqlite3", "~> 1.3.5", platforms: :ruby
 gem "rails", "5.2"
+gem "after_commit_action", "~> 1.0"
 gem "mongoid", "~>6.0"
 gem "sequel"
 gem "dynamoid", "~>2.2", platforms: :ruby

lib/aasm/persistence/active_record_persistence.rb

@@ -1,4 +1,3 @@
-require 'after_commit_action'
 require 'aasm/persistence/orm'
 module AASM
   module Persistence
@@ -29,7 +28,17 @@ module AASM
       #   end
       #
       def self.included(base)
-        base.send(:include, ::AfterCommitAction) unless base.include?(::AfterCommitAction)
+        begin
+          require 'after_commit_action'
+          base.send(:include, ::AfterCommitAction) unless base.include?(::AfterCommitAction)
+          base.send(:alias_method, :aasm_execute_after_commit, :execute_after_commit)
+        rescue LoadError
+          warn <<-MSG
+[DEPRECATION] :after_commit AASM callback is not safe in terms of race conditions and redundant calls.
+              Please add `gem 'after_commit_action', '~> 1.0'` to your Gemfile in order to fix that.
+          MSG
+        end
+
         base.send(:include, AASM::Persistence::Base)
         base.send(:include, AASM::Persistence::ORM)
         base.send(:include, AASM::Persistence::ActiveRecordPersistence::InstanceMethods)
@@ -90,12 +99,6 @@ module AASM
           end
         end
 
-        def aasm_execute_after_commit
-          execute_after_commit do
-            yield
-          end
-        end
-
         def aasm_enum(name=:default)
           case AASM::StateMachineStore.fetch(self.class, true).machine(name).config.enum
           when false then nil