... 253user_session, 217 Vvalid(), 214 validate, 14 3validates_each, 12 5Validation, 26, 27fin ActiveRecord, 11 3 11 6limitations in, 11 6errors, 14 3in Rails, 14 3in Rails vs. Java, 11 5and Struts, 14 2, 17 5and ... 83Scriptaculous, 18 5, 18 6 for Selenium and Rails, 19 3 for soap4r, 259 for Struts, 17 4tag, 16 9Lifecycle callbacks in ActiveRecord, 11 6 11 8Lifecycle methods, 204Linux, and Rails setup, 21 list, 13 5, 13 7, 13 8Load ... ActionController, 15 4 15 9appender, 15 5debug message, 15 6and JDK 1. 4, 15 6layout, 15 5log levels of, 15 4in Rails, 15 7, 15 9Logging in Struts, 14 7login, 15 1login_as, 290logout, 15 1MMacand Rails setup, 21 TextMate...