[4.7.2]: Exception 'TypeError' with message 'strtolower(): Argument #1 ($string) must be of type string, array given'

[boboldehampsink]

What happened?

Description

When updating from Craft 4.7.1 to 4.7.2 the following error is showing up:

2024-02-08 02:16:34 CEST | Exception 'TypeError' with message 'strtolower(): Argument #1 ($string) must be of type string, array given'
-- | --
  | 2024-02-08 02:16:34 CEST |  
  | 2024-02-08 02:16:34 CEST | in /app/user/vendor/craftcms/cms/src/fields/BaseOptionsField.php:326
  | 2024-02-08 02:16:34 CEST |  
  | 2024-02-08 02:16:34 CEST | Stack trace:
  | 2024-02-08 02:16:34 CEST | #0 /app/user/vendor/craftcms/cms/src/fields/BaseOptionsField.php(326): strtolower(Array)
  | 2024-02-08 02:16:34 CEST | #1 /app/user/vendor/craftcms/cms/src/base/Element.php(5339): craft\fields\BaseOptionsField->normalizeValue(Array, Object(craft\elements\Entry))
  | 2024-02-08 02:16:34 CEST | #2 /app/user/vendor/craftcms/cms/src/base/Element.php(4173): craft\base\Element->normalizeFieldValue('regionsNl')
  | 2024-02-08 02:16:34 CEST | #3 /app/user/vendor/craftcms/cms/src/base/Element.php(2180): craft\base\Element->getFieldValue('regionsNl')
  | 2024-02-08 02:16:34 CEST | #4 /app/user/vendor/yiisoft/yii2/validators/Validator.php(306): craft\base\Element->__get('field:regionsNl')
  | 2024-02-08 02:16:34 CEST | #5 /app/user/vendor/craftcms/cms/src/base/Element.php(2488): yii\validators\Validator->validateAttribute(Object(craft\elements\Entry), 'field:regionsNl')
  | 2024-02-08 02:16:34 CEST | #6 /app/user/vendor/yiisoft/yii2/base/Model.php(370): craft\base\Element->afterValidate()
  | 2024-02-08 02:16:34 CEST | #7 /app/user/vendor/craftcms/cms/src/base/Element.php(2458): yii\base\Model->validate(Array, true)
  | 2024-02-08 02:16:34 CEST | #8 /app/user/vendor/craftcms/cms/src/services/Elements.php(3268): craft\base\Element->validate(NULL)
  | 2024-02-08 02:16:34 CEST | #9 /app/user/vendor/craftcms/cms/src/services/Elements.php(1106): craft\services\Elements->_saveElementInternal(Object(craft\elements\Entry), true, true, false, Array, false, false)
  | 2024-02-08 02:16:34 CEST | #10 /app/user/vendor/craftcms/cms/src/test/fixtures/elements/BaseElementFixture.php(154): craft\services\Elements->saveElement(Object(craft\elements\Entry), true, true, false)
  | 2024-02-08 02:16:34 CEST | #11 /app/user/vendor/craftcms/cms/src/test/fixtures/elements/BaseElementFixture.php(84): craft\test\fixtures\elements\BaseElementFixture->saveElement(Object(craft\elements\Entry))
  | 2024-02-08 02:16:34 CEST | #12 /app/user/vendor/yiisoft/yii2/test/FixtureTrait.php(96): craft\test\fixtures\elements\BaseElementFixture->load()
  | 2024-02-08 02:16:34 CEST | #13 /app/user/vendor/yiisoft/yii2/console/controllers/FixtureController.php(160): yii\console\controllers\FixtureController->loadFixtures(Array)

Steps to reproduce

1. This happens when loading a checkboxes field via fixtures. The fixture looks like this:

'regionsNl' => ['overijssel', 'duitsland'],

Expected behavior

This used to work before 4.7.2

Actual behavior

Throws error on 4.7.2

Craft CMS version

4.7.2

PHP version

8.3.2

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions

[boboldehampsink]

Also just showing up when adding entries

[brandonkelly]

Thanks for reporting that! We just tagged 4.7.2.1 with a fix.