public user registration logic amend

CHANGELOG.md

@@ -11,6 +11,7 @@
 - Fixed a bug where cancelling a conflicting volume folder move would result in the moved folder getting deleted.
 - Fixed a bug where `craft\elements\Category::canDuplicate()` wasn’t factoring in save permissions.
 - Fixed a bug where the horizontal scroll position wasn’t being retained when refreshing Live Preview. ([#12504](https://github.com/craftcms/cms/issues/12504))
+- Fixed a bug where user group condition rules for the default user group weren’t getting matched properly during public registration. ([#12283](https://github.com/craftcms/cms/issues/12283))
 - Deprecated `craft\helpers\DateTimeHelper::timeZoneAbbreviation()`.
 - Deprecated `craft\helpers\DateTimeHelper::timeZoneOffset()`.
 

src/controllers/UsersController.php

@@ -1367,6 +1367,19 @@ public function actionSaveUser(): ?Response
             }
         }
 
+        // If this is public registration and it's a Pro version,
+        // set the default group on the user, so that any content
+        // based on user group condition can be validated and saved against them
+        if ($isPublicRegistration) {
+            $defaultGroupUid = Craft::$app->getProjectConfig()->get('users.defaultGroup');
+            if ($defaultGroupUid) {
+                $group = Craft::$app->userGroups->getGroupByUid($defaultGroupUid);
+                if ($group) {
+                    $user->setGroups([$group]);
+                }
+            }
+        }
+
         // If this is Craft Pro, grab any profile content from post
         $fieldsLocation = $this->request->getParam('fieldsLocation', 'fields');
         $user->setFieldValuesFromRequest($fieldsLocation);