如何解决 Active Record Yii2 中列名的问题？

Question

I have a black list of email domains in db (table black_list_domains with fields id and domain ) and I need to validate user's email address while registration.

The validation must add error if user's email matches pattern '%@%domain' .

So, working mysql-query is:

SELECT * FROM `black_list_domains` WHERE '$email' LIKE CONCAT('%@%', domain)"

But when I try to make this checking in my Validator's class with Active Record:

BlackListDomains::find()->where(['like', $email, new \yii\db\Expression("CONCAT('%@%', domain)")])->exists();

it returns a MySQL error Column not found: 1054 Unknown column 'test@test.test' in 'where clause' ( test@test.test is user's email address).

I can make a correct query with createCommand :

\Yii::$app->db->createCommand("SELECT * FROM `black_list_domains` WHERE '$email' LIKE CONCAT('%@%', domain)")->queryAll();

But I think it is possible to make this with Active Record. Or not?

Answer 1

Second argument in like comparison array is intended to be column name by default. You should probably use expression for the whole condition, to avoid unnecessary escaping of % ;

BlackListDomains::find()
    ->where(new \yii\db\Expression(":email LIKE CONCAT('%@%', domain)", [
        'email' => $email,
    ]))
    ->exists();