Add password_expires_at to users table

app/controllers/application_controller.rb

 class ApplicationController < ActionController::Base
   before_filter :authenticate_user!
   before_filter :reject_blocked!
-  before_filter :check_password_expiration!
+  before_filter :check_password_expiration
   before_filter :set_current_user_for_thread
   before_filter :add_abilities
   before_filter :dev_tools if Rails.env == 'development'
@@ -159,7 +159,7 @@ class ApplicationController < ActionController::Base
   end
   def check_password_expiration
-    if current_user.password_expires_at < Time.now
+    if current_user.password_expires_at && current_user.password_expires_at < Time.now
       redirect_to new_profile_password_path and return
     end
   end

db/migrate/20130613165816_add_password_expires_at_to_users.rb

+class AddPasswordExpiresAtToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :password_expires_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 => 20130522141856) do
+ActiveRecord::Schema.define(:version => 20130613165816) do
   create_table "deploy_keys_projects", :force => true do |t|
     t.integer  "deploy_key_id", :null => false
@@ -292,6 +292,7 @@ ActiveRecord::Schema.define(:version => 20130522141856) do
     t.string   "state"
     t.integer  "color_scheme_id",        :default => 1,     :null => false
     t.integer  "notification_level",     :default => 1,     :null => false
+    t.datetime "password_expires_at"
   end
   add_index "users", ["admin"], :name => "index_users_on_admin"