introduction of before transaction and after transaction callbacks

lib/aasm/core/event.rb

@@ -13,7 +13,16 @@ module AASM::Core
 
       # from aasm4
       @options = options # QUESTION: .dup ?
-      add_options_from_dsl(@options, [:after, :before, :error, :success, :after_commit, :ensure], &block) if block
+      add_options_from_dsl(@options, [
+        :after,
+        :after_commit,
+        :after_transaction,
+        :before,
+        :before_transaction,
+        :ensure,
+        :error,
+        :success,
+      ], &block) if block
     end
 
     # a neutered version of fire - it doesn't actually fire the event, it just

lib/aasm/persistence/active_record_persistence.rb

@@ -145,11 +145,24 @@ module AASM
         end
 
         def aasm_fire_event(state_machine_name, name, options, *args, &block)
-          success = options[:persist] ? self.class.transaction(:requires_new => requires_new?(state_machine_name)) { super } : super
-
-          if success && options[:persist]
           event = self.class.aasm(state_machine_name).state_machine.events[name]
+
+          if options[:persist]
+            event.fire_callbacks(:before_transaction, self, *args)
+            event.fire_global_callbacks(:before_all_transactions, self, *args)
+          end
+
+          begin
+            success = options[:persist] ? self.class.transaction(:requires_new => requires_new?(state_machine_name)) { super } : super
+            if options[:persist] && success
               event.fire_callbacks(:after_commit, self, *args)
+              event.fire_global_callbacks(:after_all_commits, self, *args)
+            end
+          ensure
+            if options[:persist]
+              event.fire_callbacks(:after_transaction, self, *args)
+              event.fire_global_callbacks(:after_all_transactions, self, *args)
+            end
           end
 
           success

spec/models/validator.rb

@@ -2,22 +2,46 @@ require 'active_record'
 
 class Validator < ActiveRecord::Base
 
+  attr_accessor :after_transaction_performed_on_fail,
+    :after_transaction_performed_on_run,
+    :before_transaction_performed_on_fail,
+    :before_transaction_performed_on_run
+
   include AASM
+
   aasm :column => :status do
     state :sleeping, :initial => true
     state :running
     state :failed, :after_enter => :fail
 
     event :run, :after_commit => :change_name! do
+      after_transaction do
+        @after_transaction_performed_on_run = true
+      end
+
+      before_transaction do
+        @before_transaction_performed_on_run = true
+      end
+
       transitions :to => :running, :from => :sleeping
     end
+
     event :sleep do
       after_commit do |name|
         change_name_on_sleep name
       end
       transitions :to => :sleeping, :from => :running
     end
+
     event :fail do
+      after_transaction do
+        @after_transaction_performed_on_fail = true
+      end
+
+      before_transaction do
+        @before_transaction_performed_on_fail = true
+      end
+
       transitions :to => :failed, :from => [:sleeping, :running]
     end
   end

spec/unit/persistence/active_record_persistence_spec.rb

@@ -468,7 +468,39 @@ describe 'transitions with persistence' do
         expect(validator).to be_running
         expect(validator.name).to eq("name")
       end
+    end
 
+    describe 'before and after transaction callbacks' do
+      [:after, :before].each do |event_type|
+        describe "before_transaction callback" do
+          it "should fire :#{event_type}_transaction if transaction was successful" do
+            validator = Validator.create(:name => 'name')
+            expect(validator).to be_sleeping
+
+            expect { validator.run! }.to change { validator.send("#{event_type}_transaction_performed_on_run") }.from(nil).to(true)
+            expect(validator).to be_running
+          end
+
+          it "should fire :before_transaction if transaction failed" do
+            validator = Validator.create(:name => 'name')
+            expect do
+              begin
+                validator.fail!
+              rescue => ignored
+              end
+            end.to change { validator.send("#{event_type}_transaction_performed_on_fail") }.from(nil).to(true)
+            expect(validator).to_not be_running
+          end
+
+          it "should not fire if not saving" do
+            validator = Validator.create(:name => 'name')
+            expect(validator).to be_sleeping
+            expect { validator.run }.to_not change { validator.send("#{event_type}_transaction_performed_on_run") }
+            expect(validator).to be_running
+            expect(validator.name).to eq("name")
+          end
+        end
+      end
     end
 
     context "when not persisting" do