define defalut value to session.data

lib/sequel-rails/session_store.rb

@@ -15,30 +15,50 @@ class Session < ::Sequel::Model
         # property :updated_at, DateTime, :required => false, :index => true
 
         class << self
-          
+
           def auto_migrate!
             self.db.create_table :sessions do
               primary_key :id
-              column :session_id, String, 
-                     :null    => false, 
-                     :unique  => true, 
+              column :session_id, String,
+                     :null    => false,
+                     :unique  => true,
                      :index   => true
 
-              column :data, :text, 
-                     :null => false 
-                     
-              column :updated_at, DateTime, 
-                     :null => true, 
+              column :data, :text,
+                     :null => false
+
+              column :updated_at, DateTime,
+                     :null => true,
                      :index => true
             end
           end
-
+
+          def marshal(data)
+            ActiveSupport::Base64.encode64(Marshal.dump(data)) if data
+          end
+
+          def unmarshal(data)
+            Marshal.load(ActiveSupport::Base64.decode64(data)) if data
+          end
         end
 
         def self.name
           'session'
         end
 
+        def data
+          self[:data] ||= self.class.unmarshal(self[:data]) || {}
+        end
+
+        def marshal_data!
+          return false unless self[:data]
+          self[:data] = self.class.marshal(data)
+        end
+
+        def before_save
+          marshal_data!
+          super
+        end
       end
 
       SESSION_RECORD_KEY = 'rack.session.record'.freeze
@@ -58,7 +78,7 @@ def get_session(env, sid)
       def set_session(env, sid, session_data)
         session            = get_session_resource(env, sid)
         session.data       = session_data
-        session.updated_at = Time.now if session.dirty?
+        session.updated_at = Time.now if session.modified?
         session.save
       end
 
@@ -72,7 +92,7 @@ def get_session_resource(env, sid)
 
       def find_session(sid)
         klass = self.class.session_class
-        
+
         klass.where(:session_id => sid).first || klass.new(:session_id => sid)
       end