updating generators

activerecord/lib/rails/generators/active_record/migration/templates/migration.rb

 class <%= migration_class_name %> < ActiveRecord::Migration
-  def self.up
+  def up
 <% attributes.each do |attribute| -%>
   <%- if migration_action -%>
     <%= migration_action %>_column :<%= table_name %>, :<%= attribute.name %><% if migration_action == 'add' %>, :<%= attribute.type %><% end %>
@@ -7,7 +7,7 @@ def self.up
 <%- end -%>
   end
 
-  def self.down
+  def down
 <% attributes.reverse.each do |attribute| -%>
   <%- if migration_action -%>
     <%= migration_action == 'add' ? 'remove' : 'add' %>_column :<%= table_name %>, :<%= attribute.name %><% if migration_action == 'remove' %>, :<%= attribute.type %><% end %>

activerecord/lib/rails/generators/active_record/model/templates/migration.rb

 class <%= migration_class_name %> < ActiveRecord::Migration
-  def self.up
+  def up
     create_table :<%= table_name %> do |t|
 <% for attribute in attributes -%>
       t.<%= attribute.type %> :<%= attribute.name %>
@@ -10,7 +10,7 @@ def self.up
     end
   end
 
-  def self.down
+  def down
     drop_table :<%= table_name %>
   end
 end

activerecord/lib/rails/generators/active_record/session_migration/templates/migration.rb

 class <%= migration_class_name %> < ActiveRecord::Migration
-  def self.up
+  def up
     create_table :<%= session_table_name %> do |t|
       t.string :session_id, :null => false
       t.text :data
@@ -10,7 +10,7 @@ def self.up
     add_index :<%= session_table_name %>, :updated_at
   end
 
-  def self.down
+  def down
     drop_table :<%= session_table_name %>
   end
 end