Set a value of 0 for unchecked checkboxes

Many people who aren’t too familiar with the Ruby on Rails framework may do well to learn about a convenient little trick they do with submitting check boxes.

In HTML, when you click a check box and submit it, by default, the value POSTed is “1″ – and if you do not click it, nothing is submitted. This sometimes makes keeping track of check boxes difficult.

To combat this, Rails puts a hidden field before the check box, with the same name as the check box, with a value of zero.


Click this to set my_ckbx to 1

Now when the form loads, my_chbx is defaulted to “0″. If you choose to click the check box, my_ckbx will be set to “1″, if not, it will remain “0″. No matter what, my_ckbx will POST a value.

  • Digg
  • del.icio.us
  • Facebook
  • Google Bookmarks
  • Twitter

Comment | Trackback


Code

Leave a Reply