Fix #13920: Fixed erroneous validation for specific cases

framework/CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 Change Log
 2.0.49 under development
 ------------------------
 
+- Bug #13920: Fixed erroneous validation for specific cases
 - Bug #19899: Fixed `GridView` in some cases calling `Model::generateAttributeLabel()` to generate label values that are never used (PowerGamer1)
 - Bug #9899: Fix caching a MSSQL query with BLOB data type (terabytesoftw)
 - Bug #16208: Fix `yii\log\FileTarget` to not export empty messages (terabytesoftw)

framework/assets/yii.activeForm.js

@@ -395,9 +395,11 @@
                         data: $form.serialize() + extData,
                         dataType: data.settings.ajaxDataType,
                         complete: function (jqXHR, textStatus) {
+                            currentAjaxRequest = null;
                             $form.trigger(events.ajaxComplete, [jqXHR, textStatus]);
                         },
                         beforeSend: function (jqXHR, settings) {
+                            currentAjaxRequest = jqXHR;
                             $form.trigger(events.ajaxBeforeSend, [jqXHR, settings]);
                         },
                         success: function (msgs) {
@@ -563,6 +565,9 @@
             return;
         }
 
+        if (currentAjaxRequest !== null) {
+            currentAjaxRequest.abort();
+        }
         if (data.settings.timer !== undefined) {
             clearTimeout(data.settings.timer);
         }
@@ -929,4 +934,7 @@
             $form.find(attribute.input).attr('aria-invalid', hasError ? 'true' : 'false');
         }
     }
+
+    var currentAjaxRequest = null;
+
 })(window.jQuery);