Rails 3 - validation of checkboxes

I have the form 2 checkboxes and I am trying to find some way, how to validate it - I want to know, if a user clicked on one of two checkboxes...

I tried to开发者_如何学C do it with validates_presence_of, but unfortunately, without success...

Can anyone help me, please, how to do? Thank you, M.

You can use custom validate functions for this.

 validate :custom_checkbox_validation

      def custom_checkbox_validation
        errors.add(:base, "Please check atleast one checkbox.") unless chkbox1 || chkbox2
      end

To work this, You should have 2 checkboxes in your view files.

<%= form.check_box :chkbox1 %>
<%= form.check_box :chkbox2 %>