Fixed #17696

Author: brandonkelly

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Fixed a bug where reference tags that only referenced an entry’s slug weren’t resolving.
 - Fixed a race condition that could cause “User is not authorized” errors in the control panel. ([#17694](https://github.com/craftcms/cms/issues/17694))
 - Fixed a bug where `craft\elements\Asset::getFormattedSizeInBytes()` wasn’t returning `null` when the asset’s `size` property was `null`. ([#17695](https://github.com/craftcms/cms/issues/17695))
+- Fixed an error that could occur when saving an address, if any fields contained more than 255 characters, or emoji characters. ([#17696](https://github.com/craftcms/cms/issues/17696))
 
 ## 4.16.8 - 2025-07-25
 

src/elements/Address.php

@@ -20,6 +20,7 @@
 use craft\fieldlayoutelements\FullNameField;
 use craft\models\FieldLayout;
 use craft\records\Address as AddressRecord;
+use craft\validators\StringValidator;
 use yii\base\InvalidConfigException;
 
 /**
@@ -550,6 +551,26 @@ public function defineRules(): array
         $rules[] = [['ownerId'], 'number'];
         $rules[] = [['countryCode'], 'required'];
 
+        $stringFields = [
+            'countryCode',
+            'administrativeArea',
+            'locality',
+            'dependentLocality',
+            'postalCode',
+            'sortingCode',
+            'addressLine1',
+            'addressLine2',
+            'organization',
+            'organizationTaxId',
+            'fullName',
+            'firstName',
+            'lastName',
+            'latitude',
+            'longitude',
+        ];
+        $rules[] = [$stringFields, 'trim'];
+        $rules[] = [$stringFields, StringValidator::class, 'max' => 255, 'disallowMb4' => true];
+
         $addressesService = Craft::$app->getAddresses();
         $countryCodes = array_keys($addressesService->getCountryRepository()->getList());
         $rules[] = [['countryCode'], 'in', 'range' => $countryCodes];