I am using magento 1.9. In my custome module, In system.xml added field type checkboxes.

<show_featuredproduct translate="label">
    <label>Show Featured Product On</label>

I want to add validation for this field. I used <validate>validate-one-required</validate> but its not working. Any Idea?

  • Can you confirm whether Magento is adding the validate-one-required class to the checkbox elements? Aug 6, 2014 at 14:11
  • @ColinO'Dell - class not added to the element. Aug 6, 2014 at 14:30
  • @PMB I noticed a prodblem with varien form and checkbox validation recently. Have a look at magento.stackexchange.com/q/28524/158 Aug 6, 2014 at 15:55
  • @DavidManners - I used getClass. It shows validation message for every checkbox. Yes there is problem with validation. Aug 7, 2014 at 6:31
  • I used multiple select drop down instead of checkboxes Aug 7, 2014 at 10:22

2 Answers 2


It's likely not working for 1 of 2 reasons:

1. The class isn't being applied to the input elements.

If this the case, try using <frontend_class>validate-one-required</frontend_class> instead, and see whether that applies the class.

2. The validate-one-required rule isn't working as expected.

You can try using validate-one-required-by-name instead, which Magento seems to use frequently with other sets of checkboxes.

Try one (or both) combinations, and hopefully that'll do the trick.

  • I tried both combinations not working Aug 6, 2014 at 14:24
  • 1
    Try required-entry or validate-select
    – Manikandan
    Aug 6, 2014 at 14:48

Try this if you want required field means


Refer this link Here

  • 1
    @Manikkandan I tried for both. Both not working. Seems there is problem with the multiple check box validation. Aug 7, 2014 at 8:50

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