enable lockable strategy for users

db/migrate/20120706065612_add_lockable_to_users.rb

@@ -0,0 +1,6 @@
+class AddLockableToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :failed_attempts, :integer, :default => 0
+    add_column :users, :locked_at, :datetime
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20120627145613) do
+ActiveRecord::Schema.define(:version => 20120706065612) do
 
   create_table "events", :force => true do |t|
     t.string   "target_type"
@@ -169,6 +169,8 @@ ActiveRecord::Schema.define(:version => 20120627145613) do
     t.integer  "theme_id",                              :default => 1,     :null => false
     t.string   "bio"
     t.boolean  "blocked",                               :default => false, :null => false
+    t.integer  "failed_attempts",                       :default => 0
+    t.datetime "locked_at"
   end
 
   add_index "users", ["email"], :name => "index_users_on_email", :unique => true