https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear Gravity Support Forums Topic: $0 Donation causes form to disappear en-US Thu, 23 Apr 2026 15:05:44 +0000 http://bbpress.org/?v=1.0.1 q https://legacy.forums.gravityhelp.com/search.php https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear#post-53900 Fri, 30 Mar 2012 20:37:24 +0000 Rob Harrell 53900@https://legacy.forums.gravityhelp.com/ <p>RIght on right on! Glad to help. </p> https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear#post-53883 Fri, 30 Mar 2012 14:32:25 +0000 clustrmedia 53883@https://legacy.forums.gravityhelp.com/ <p>Worked like a charm! Thank you very much! </p> https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear#post-53720 Wed, 28 Mar 2012 20:41:46 +0000 Rob Harrell 53720@https://legacy.forums.gravityhelp.com/ <p>Gotcha, no problem, this should work for you. Place this into your theme's functions file. This is using the gform_validation hook that is found here:</p> <p><a href="http://www.gravityhelp.com/documentation/page/Gform_validation" rel="nofollow">http://www.gravityhelp.com/documentation/page/Gform_validation</a></p> <pre><code>&lt;?php //Form ID add_filter(&#39;gform_validation_3&#39;, &#39;custom_validation&#39;); function custom_validation($validation_result){ //finding field with ID of 1 and making sure quantity is greater than 0 foreach($validation_result[&quot;form&quot;][&quot;fields&quot;] as &amp;$field){ //NOTE: the field you would like to validate if($field[&quot;id&quot;] == &quot;4&quot;){ //Base prices are retrieved using &quot;input_FIELDID_2&quot; $base_price = GFCommon::to_number($_POST[&quot;input_3_2&quot;]); //Quantities are retrieved using &quot;input_FIELDID_3&quot; $quantity = $_POST[&quot;input_3_3&quot;]; //fails validation if quantity is not a positive integer or if price is equal to $0 if($quantity &lt;= 0 || $base_price == 0){ $validation_result[&quot;is_valid&quot;] = false; $field[&quot;failed_validation&quot;] = true; $field[&quot;validation_message&quot;] = &quot;Please enter a valid amount.&quot;; } break; } } return $validation_result; } ?&gt;</code></pre> https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear#post-53713 Wed, 28 Mar 2012 19:46:21 +0000 clustrmedia 53713@https://legacy.forums.gravityhelp.com/ <p>Thanks Rob. We don't want to change the amount the user enters in the donation field. We just want the error message to display if they enter $0. Is there a filter for that? I'm not that skilled in PHP so I may need a bit more help. </p> https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear#post-53647 Tue, 27 Mar 2012 20:39:08 +0000 Rob Harrell 53647@https://legacy.forums.gravityhelp.com/ <p>That sucks that you really have people try to donate $0 to you. I mean, $0.00 is a valid amount, technically. I'm thinking you might need to use this filter to potentially check for a $0.00 amount and then maybe set it to a minimum of $1.00.</p> <p><a href="http://www.gravityhelp.com/documentation/page/Gform_paypal_query" rel="nofollow">http://www.gravityhelp.com/documentation/page/Gform_paypal_query</a> </p> https://legacy.forums.gravityhelp.com/topic/0-donation-causes-form-to-disappear#post-53643 Tue, 27 Mar 2012 19:40:45 +0000 clustrmedia 53643@https://legacy.forums.gravityhelp.com/ <p>I have set up a donation form with the Paypal Add-On. I have set the donation field to be a User-Defined Price. The problem we have run into is if the user submits the form with $0 in the donation field, the form disappears. It doesn't show the normal error handling message like if you were to enter a negative value like -$1.00. What do I need to change to make it display the error message instead of making the form disappear?</p> <p>The form can be viewed here - <a href="http://techisgood.org/donate/" rel="nofollow">http://techisgood.org/donate/</a> </p>