Initial release of Discourse

db/migrate/20120720013733_add_username_lower_to_users.rb

@@ -0,0 +1,11 @@
+class AddUsernameLowerToUsers < ActiveRecord::Migration
+  def up
+    add_column :users, :username_lower, :string, limit: 20
+    execute "update users set username_lower = lower(username)"
+    add_index :users, [:username_lower], :unique => true
+    change_column :users, :username_lower, :string, limit: 20, null:false
+  end
+  def down
+    remove_column :users, :username_lower
+  end
+end