Rake tasks should load generators from new paths.

activerecord/lib/active_record/railties/databases.rake

@@ -428,7 +428,7 @@ namespace :db do
     task :create => :environment do
       raise "Task unavailable to this database (no migration support)" unless ActiveRecord::Base.connection.supports_migrations?
       require 'rails/generators'
-      require 'rails/generators/rails/session_migration/session_migration_generator'
+      require 'generators/rails/session_migration/session_migration_generator'
       Rails::Generators::SessionMigrationGenerator.start [ ENV["MIGRATION"] || "add_sessions_table" ]
     end
 

railties/lib/rails/tasks/framework.rake

@@ -86,7 +86,7 @@ namespace :rails do
     template = File.expand_path(template) if template !~ %r{\A[A-Za-z][A-Za-z0-9+\-\.]*://}
 
     require 'rails/generators'
-    require 'rails/generators/rails/app/app_generator'
+    require 'generators/rails/app/app_generator'
     generator = Rails::Generators::AppGenerator.new [ Rails.root ], {}, :destination_root => Rails.root
     generator.apply template, :verbose => false
   end
@@ -94,7 +94,7 @@ namespace :rails do
   namespace :update do
     def invoke_from_app_generator(method)
       require 'rails/generators'
-      require 'rails/generators/rails/app/app_generator'
+      require 'generators/rails/app/app_generator'
 
       generator = Rails::Generators::AppGenerator.new ["rails"], { :with_dispatchers => true },
                                                       :destination_root => Rails.root