Add default value for alerted attribute

db/migrate/20130407102854_add_default_value.rb

@@ -0,0 +1,9 @@
+class AddDefaultValue < ActiveRecord::Migration
+  def up
+    change_column :alerts, :alerted, :boolean, :default => false
+  end
+
+  def down
+    change_column :alerts, :alerted, :boolean, :default => nil
+  end
+end

db/schema.rb

@@ -11,18 +11,29 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20130406050216) do
+ActiveRecord::Schema.define(:version => 20130407102854) do
 
   create_table "alerts", :force => true do |t|
     t.integer  "user_id"
     t.string   "department"
     t.string   "course"
-    t.boolean  "alerted"
-    t.datetime "created_at", :null => false
-    t.datetime "updated_at", :null => false
+    t.boolean  "alerted",    :default => false
+    t.datetime "created_at",                    :null => false
+    t.datetime "updated_at",                    :null => false
     t.string   "semester"
   end
 
+  create_table "roles", :force => true do |t|
+    t.string   "name"
+    t.integer  "resource_id"
+    t.string   "resource_type"
+    t.datetime "created_at",    :null => false
+    t.datetime "updated_at",    :null => false
+  end
+
+  add_index "roles", ["name", "resource_type", "resource_id"], :name => "index_roles_on_name_and_resource_type_and_resource_id"
+  add_index "roles", ["name"], :name => "index_roles_on_name"
+
   create_table "users", :force => true do |t|
     t.string   "email",                  :default => "", :null => false
     t.string   "encrypted_password",     :default => "", :null => false
@@ -41,4 +52,11 @@ ActiveRecord::Schema.define(:version => 20130406050216) do
   add_index "users", ["email"], :name => "index_users_on_email", :unique => true
   add_index "users", ["reset_password_token"], :name => "index_users_on_reset_password_token", :unique => true
 
+  create_table "users_roles", :id => false, :force => true do |t|
+    t.integer "user_id"
+    t.integer "role_id"
+  end
+
+  add_index "users_roles", ["user_id", "role_id"], :name => "index_users_roles_on_user_id_and_role_id"
+
 end