查找不到数据的时候，err与gorm.ErrRecordNotFound比较的结果是false

[kkb-1]

当我查找不到数据的时候，这里的err变量打印出来的信息是"record not found"，但是为什么err与gorm.ErrRecordNotFound比较的结果是false，求解答
func (u User)Exist(username string) (bool, error) {
err := db.Where("username = ?", username).Not("level = ?", -1).First(&User{}).Error
if err != nil {

	if errors.Is(err, gorm.ErrRecordNotFound) {
		return false, nil
	}
	
	return false, err
}

return true, nil

}

[github-actions]

The issue has been automatically marked as stale as it missing playground pull request link, which is important to help others understand your issue effectively and make sure the issue hasn't been fixed on latest master, checkout https://github.com/go-gorm/playground for details. it will be closed in 30 days if no further activity occurs. if you are asking question, please use the Question template, most likely your question already answered https://github.com/go-gorm/gorm/issues or described in the document https://gorm.io ✨ Search Before Asking ✨

[gg1229505432]

I test, the code :
errors.Is(err, gorm.ErrRecordNotFound)
is true

[github-actions]

The issue has been automatically marked as stale as it missing playground pull request link, which is important to help others understand your issue effectively and make sure the issue hasn't been fixed on latest master, checkout https://github.com/go-gorm/playground for details. it will be closed in 30 days if no further activity occurs. if you are asking question, please use the Question template, most likely your question already answered https://github.com/go-gorm/gorm/issues or described in the document https://gorm.io ✨ Search Before Asking ✨

[TENX-S]

I got the same issue with mysql driver. But it works with sqlite driver.

[github-actions]

The issue has been automatically marked as stale as it missing playground pull request link, which is important to help others understand your issue effectively and make sure the issue hasn't been fixed on latest master, checkout https://github.com/go-gorm/playground for details. it will be closed in 30 days if no further activity occurs. if you are asking question, please use the Question template, most likely your question already answered https://github.com/go-gorm/gorm/issues or described in the document https://gorm.io ✨ Search Before Asking ✨