https://legacy.forums.gravityhelp.com/topic/conditional-logic-15 Gravity Support Forums Topic: Conditional Logic en-US Mon, 20 Apr 2026 02:50:14 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/conditional-logic-15#post-170531 Wed, 13 Mar 2013 22:51:54 +0000 Chris Hajer 170531@https://legacy.forums.gravityhelp.com/ <p>You can add field B to your form and make it required. Hide it with conditional logic that says "if field A is selected, then show this field." If field A is selected, field B will show and be required. If field A is not selected, field B will never show, and will still pass validation even though it is hidden and required.</p> <p>Let me know if I missed something or overlooked an obvious shortcoming in this approach. I use a similar approach here: <a href="http://gravity.chrishajer.com/contact-us-left-and-right/" rel="nofollow">http://gravity.chrishajer.com/contact-us-left-and-right/</a></p> <p>You would not need two choices for A (as I use radio buttons here for call or email.) However, the phone and email fields are both required, and only one will even be submitted, because they are both hidden with conditional logic and only one will ever show. </p> https://legacy.forums.gravityhelp.com/topic/conditional-logic-15#post-168969 Tue, 12 Mar 2013 13:48:17 +0000 David Peralty 168969@https://legacy.forums.gravityhelp.com/ <p>No, but using PHP and our gform_validation hook, you can send back an error to the user if they select a but not b. <a href="http://www.gravityhelp.com/documentation/page/Gform_validation" rel="nofollow">http://www.gravityhelp.com/documentation/page/Gform_validation</a> </p> https://legacy.forums.gravityhelp.com/topic/conditional-logic-15#post-168957 Tue, 12 Mar 2013 13:21:23 +0000 onyourmarkllc 168957@https://legacy.forums.gravityhelp.com/ <p>Is there a way to use conditional logic to require field "b" if field "a" is selected? </p>