Runs annotate on 'rake db:rollback' too

lib/tasks/migrate.rake

@@ -5,12 +5,13 @@
 # run after doing db:migrate.
 
 namespace :db do
-  task :migrate do
+  [:migrate, :rollback].each do |cmd|
+    task cmd do
       Rake::Task['set_annotation_options'].invoke
       Annotate::Migration.update_annotations
     end
 
-  namespace :migrate do
+    namespace cmd do
       [:change, :up, :down, :reset, :redo].each do |t|
         task t do
           Rake::Task['set_annotation_options'].invoke
@@ -18,6 +19,7 @@ namespace :db do
         end
       end
     end
+  end
 end
 
 module Annotate