I have been running through the essential training for Ruby on Rails from Lynda. It is very helpful and I am learning a lot from it. I am having a problem with Chapter 11 though, the CRUD and Relational Databases section to be specific. When I generate the scaffold for the albums, and try to edit an album with a release date earlier than 1970 I get a "1 error(s) on assignment of multiparameter attributes" error. If i change the release date to 1970 or later, i get no error and the record updates fine. The only way i know how to get around this is to comment out the release date section of the edit form. I am assuming that this problem isn't specific to the Lynda training. Does anyone have any suggestions? Thanks! jm
on 2007-03-02 01:42
on 2007-09-26 01:08
You aren't doing anything wrong. This is an issue that rears it's head from time to time. Some platforms don't handle dates outside the 1970-2038 range well. Yours is most likely one of them. Rails' ActiveRecord has to do the job of converting what it receives via HTML form parameters into something that your platform/database can stomach. It uses the Time class to do that (because it's faster) but can be told to use DateTime instead. On most systems, it's either not a problem or has been sorted out, but there are a few systems that still cause peole grief. (Microsoft / MS SQL are often the ones.) There are official patches in the works (http://dev.rubyonrails.org/ ticket/3430) and also do-it-yourself work arounds (a Google search for 'ActiveRecord DateTime 1970' should find them). My suggestion, assuming that you can't switch computers or databases, would be to input more recent dates while you continue the tutorial. It's not important for you to solve this problem in order to learn the essentials of Rails. When you actually need dates before 1970 for an application, you can try and see if it's been solved "officially", switch platforms then, or investigate the DIY solutions out there. HTH, Kevin S.
on 2007-09-26 01:12
Thank you so much for the links and insight. How about some plans for another Lynda Ruby on Rails movie training set. Where do i go after finishing the Lynda tutorials that you created? jm
on 2007-09-26 01:12
The next title, "Ruby on Rails: Beyond the Basics", is in the works now. Best, Kevin S.