Add missing users.email unique index at database level

db/migrate/20110913195421_add_email_unique_index_to_users.rb

@@ -0,0 +1,9 @@
+class AddEmailUniqueIndexToUsers < ActiveRecord::Migration
+  def self.up
+    add_index :users, :email, :unique => true
+  end
+
+  def self.down
+    drop_index :users, :email
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20110830110346) do
+ActiveRecord::Schema.define(:version => 20110913195421) do
 
   create_table "playlists", :force => true do |t|
     t.string   "name"
@@ -44,4 +44,6 @@ ActiveRecord::Schema.define(:version => 20110830110346) do
     t.string   "password_hash"
   end
 
+  add_index "users", ["email"], :name => "index_users_on_email", :unique => true
+
 end