no need for WriteState mixin anymore (to keep adding persistence simple)

API

@@ -7,3 +7,13 @@ Overwrite method to read the current state
       # retrieve the current state manually
     end
   end
+
+Overwrite method to write the current state
+
+  class MyClass
+    include AASM
+
+    def aasm_write_state
+      # store the current state manually
+    end
+  end

lib/aasm/aasm.rb

@@ -86,6 +86,11 @@ def aasm_read_state
     aasm.enter_initial_state
   end
 
+  # may be overwritten by persistence mixins
+  def aasm_write_state(new_state)
+    true
+  end
+
   # deprecated
   def aasm_current_state
     # warn "#aasm_current_state is deprecated and will be removed in version 3.2.0; please use #aasm.state instead!"

lib/aasm/instance_base.rb

@@ -69,10 +69,7 @@ def may_fire_event?(name, *args)
     end
 
     def set_current_state_with_persistence(state)
-      save_success = true
-      if @instance.respond_to?(:aasm_write_state) || @instance.private_methods.include?('aasm_write_state')
-        save_success = @instance.aasm_write_state(state)
-      end
+      save_success = @instance.aasm_write_state(state)
       self.current_state = state if save_success
       save_success
     end

lib/aasm/persistence/active_record_persistence.rb

@@ -7,7 +7,6 @@ module ActiveRecordPersistence
       # * includes InstanceMethods
       #
       # Unless the corresponding methods are already defined, it includes
-      # * WriteState
       # * WriteStateWithoutPersistence
       #
       # Adds
@@ -34,7 +33,6 @@ def self.included(base)
         base.send(:include, AASM::Persistence::Base)
         base.extend AASM::Persistence::ActiveRecordPersistence::ClassMethods
         base.send(:include, AASM::Persistence::ActiveRecordPersistence::InstanceMethods)
-        base.send(:include, AASM::Persistence::ActiveRecordPersistence::WriteState) unless base.method_defined?(:aasm_write_state)
         base.send(:include, AASM::Persistence::ActiveRecordPersistence::WriteStateWithoutPersistence) unless base.method_defined?(:aasm_write_state_without_persistence)
 
         if ActiveRecord::VERSION::MAJOR >= 3
@@ -74,7 +72,33 @@ def with_state_scope(state)
 
       module InstanceMethods
 
-        private
+        # Writes <tt>state</tt> to the state column and persists it to the database
+        #
+        #   foo = Foo.find(1)
+        #   foo.aasm_current_state # => :opened
+        #   foo.close!
+        #   foo.aasm_current_state # => :closed
+        #   Foo.find(1).aasm_current_state # => :closed
+        #
+        # NOTE: intended to be called from an event
+        def aasm_write_state(state)
+          old_value = read_attribute(self.class.aasm_column)
+          write_attribute(self.class.aasm_column, state.to_s)
+
+          success = if AASM::StateMachine[self.class].config.skip_validation_on_save
+            self.class.update_all({ self.class.aasm_column => state.to_s }, self.class.primary_key => self.id) == 1
+          else
+            self.save
+          end
+          unless success
+            write_attribute(self.class.aasm_column, old_value)
+            return false
+          end
+
+          true
+        end
+
+      private
 
         # Ensures that if the aasm_state column is nil and the record is new
         # that the initial state gets populated before validation on create
@@ -100,8 +124,7 @@ def aasm_fire_event(name, options, *args)
             super
           end
         end
-
-      end
+      end # InstanceMethods
 
       module WriteStateWithoutPersistence
         # Writes <tt>state</tt> to the state column, but does not persist it to the database
@@ -121,34 +144,6 @@ def aasm_write_state_without_persistence(state)
         end
       end
 
-      module WriteState
-        # Writes <tt>state</tt> to the state column and persists it to the database
-        #
-        #   foo = Foo.find(1)
-        #   foo.aasm_current_state # => :opened
-        #   foo.close!
-        #   foo.aasm_current_state # => :closed
-        #   Foo.find(1).aasm_current_state # => :closed
-        #
-        # NOTE: intended to be called from an event
-        def aasm_write_state(state)
-          old_value = read_attribute(self.class.aasm_column)
-          write_attribute(self.class.aasm_column, state.to_s)
-
-          success = if AASM::StateMachine[self.class].config.skip_validation_on_save
-            self.class.update_all({ self.class.aasm_column => state.to_s }, self.class.primary_key => self.id) == 1
-          else
-            self.save
-          end
-          unless success
-            write_attribute(self.class.aasm_column, old_value)
-            return false
-          end
-
-          true
-        end
-      end
-
     end
   end
 end

lib/aasm/persistence/mongoid_persistence.rb

@@ -7,7 +7,6 @@ module MongoidPersistence
       # * includes InstanceMethods
       #
       # Unless the corresponding methods are already defined, it includes
-      # * WriteState
       # * WriteStateWithoutPersistence
       #
       # Adds
@@ -36,7 +35,6 @@ def self.included(base)
         base.send(:include, AASM::Persistence::Base)
         base.extend AASM::Persistence::MongoidPersistence::ClassMethods
         base.send(:include, AASM::Persistence::MongoidPersistence::InstanceMethods)
-        base.send(:include, AASM::Persistence::MongoidPersistence::WriteState) unless base.method_defined?(:aasm_write_state)
         base.send(:include, AASM::Persistence::MongoidPersistence::WriteStateWithoutPersistence) unless base.method_defined?(:aasm_write_state_without_persistence)
 
         # Mongoid's Validatable gem dependency goes not have a before_validation_on_xxx hook yet.
@@ -68,7 +66,29 @@ def with_state_scope(state)
 
       module InstanceMethods
 
-        private
+        # Writes <tt>state</tt> to the state column and persists it to the database
+        # using update_attribute (which bypasses validation)
+        #
+        #   foo = Foo.find(1)
+        #   foo.aasm_current_state # => :opened
+        #   foo.close!
+        #   foo.aasm_current_state # => :closed
+        #   Foo.find(1).aasm_current_state # => :closed
+        #
+        # NOTE: intended to be called from an event
+        def aasm_write_state(state)
+          old_value = read_attribute(self.class.aasm_column)
+          write_attribute(self.class.aasm_column, state.to_s)
+
+          unless self.save(:validate => false)
+            write_attribute(self.class.aasm_column, old_value)
+            return false
+          end
+
+          true
+        end
+
+      private
 
         # Ensures that if the aasm_state column is nil and the record is new
         # that the initial state gets populated before validation on create
@@ -88,8 +108,7 @@ module InstanceMethods
         def aasm_ensure_initial_state
           send("#{self.class.aasm_column}=", aasm.enter_initial_state.to_s) if send(self.class.aasm_column).blank?
         end
-
-      end
+      end # InstanceMethods
 
       module WriteStateWithoutPersistence
         # Writes <tt>state</tt> to the state column, but does not persist it to the database
@@ -109,30 +128,6 @@ def aasm_write_state_without_persistence(state)
         end
       end
 
-      module WriteState
-        # Writes <tt>state</tt> to the state column and persists it to the database
-        # using update_attribute (which bypasses validation)
-        #
-        #   foo = Foo.find(1)
-        #   foo.aasm_current_state # => :opened
-        #   foo.close!
-        #   foo.aasm_current_state # => :closed
-        #   Foo.find(1).aasm_current_state # => :closed
-        #
-        # NOTE: intended to be called from an event
-        def aasm_write_state(state)
-          old_value = read_attribute(self.class.aasm_column)
-          write_attribute(self.class.aasm_column, state.to_s)
-
-          unless self.save(:validate => false)
-            write_attribute(self.class.aasm_column, old_value)
-            return false
-          end
-
-          true
-        end
-      end
-
       module NamedScopeMethods
         def aasm_state_with_named_scope name, options = {}
           aasm_state_without_named_scope name, options

spec/models/active_record/api.rb

@@ -1,43 +1,67 @@
 class DefaultState
+  attr_accessor :transient_store
   include AASM
   aasm do
     state :alpha, :initial => true
     state :beta
     state :gamma
+    event :release do
+      transitions :from => [:alpha, :beta, :gamma], :to => :beta
+    end
   end
 end
 
 class ProvidedState
+  attr_accessor :transient_store
   include AASM
   aasm do
     state :alpha, :initial => true
     state :beta
     state :gamma
+    event :release do
+      transitions :from => [:alpha, :beta, :gamma], :to => :beta
+    end
   end
 
   def aasm_read_state
     :beta
   end
+
+  def aasm_write_state(new_state)
+    @transient_store = new_state
+  end
 end
 
 class PersistedState < ActiveRecord::Base
+  attr_accessor :transient_store
   include AASM
   aasm do
     state :alpha, :initial => true
     state :beta
     state :gamma
+    event :release do
+      transitions :from => [:alpha, :beta, :gamma], :to => :beta
+    end
   end
 end
 
 class ProvidedAndPersistedState < ActiveRecord::Base
+  attr_accessor :transient_store
   include AASM
   aasm do
     state :alpha, :initial => true
     state :beta
     state :gamma
+    event :release do
+      transitions :from => [:alpha, :beta, :gamma], :to => :beta
+    end
   end
 
   def aasm_read_state
     :gamma
   end
+
+  def aasm_write_state(new_state)
+    @transient_store = new_state
+  end
 end

spec/unit/api_spec.rb

@@ -1,7 +1,7 @@
 require 'spec_helper'
 require 'models/active_record/api.rb'
 
-describe "retrieving the current state" do
+describe "reading the current state" do
   it "uses the AASM default" do
     DefaultState.new.aasm.current_state.should eql :alpha
   end
@@ -18,3 +18,29 @@
     ProvidedAndPersistedState.new.aasm.current_state.should eql :gamma
   end
 end
+
+describe "writing the current state" do
+  it "uses the AASM default" do
+    o = DefaultState.new
+    o.release!
+    o.transient_store.should be_nil
+  end
+
+  it "uses the provided method" do
+    o = ProvidedState.new
+    o.release!
+    o.transient_store.should eql :beta
+  end
+
+  it "uses the persistence storage" do
+    o = PersistedState.new
+    o.release!
+    o.transient_store.should be_nil
+  end
+
+  it "uses the provided method even if persisted" do
+    o = ProvidedAndPersistedState.new
+    o.release!
+    o.transient_store.should eql :beta
+  end
+end

spec/unit/persistence/active_record_persistence_spec.rb

@@ -18,7 +18,6 @@
   let(:klass) {Gate}
   it_should_behave_like "aasm model"
   it "should include all persistence mixins" do
-    klass.included_modules.should be_include(AASM::Persistence::ActiveRecordPersistence::WriteState)
     klass.included_modules.should be_include(AASM::Persistence::ActiveRecordPersistence::WriteStateWithoutPersistence)
   end
 end
@@ -27,7 +26,6 @@
   let(:klass) {Writer}
   it_should_behave_like "aasm model"
   it "should include include all persistence mixins but write state" do
-    klass.included_modules.should_not be_include(AASM::Persistence::ActiveRecordPersistence::WriteState)
     klass.included_modules.should be_include(AASM::Persistence::ActiveRecordPersistence::WriteStateWithoutPersistence)
   end
 end
@@ -36,7 +34,6 @@
   let(:klass) {Transient}
   it_should_behave_like "aasm model"
   it "should include all mixins but persistence" do
-    klass.included_modules.should be_include(AASM::Persistence::ActiveRecordPersistence::WriteState)
     klass.included_modules.should_not be_include(AASM::Persistence::ActiveRecordPersistence::WriteStateWithoutPersistence)
   end
 end