I didn't down-vote you, but I think the key to your mistake is "one time". You're never going to learn a framework enough to use it the first time (without an experienced mentor on board).

Those that did down-vote you are responding to the "Ruby-on-Fails" part of the sentence ... you were the failure, as you would have been with JavaEE, Django or Drupal. Your comment was needlessly offensive (to some at least) - if you're going to be critical, you should learn enough to contribute back too.