Логика генерации значения первичного ключа для строк вынесена в поведение

common/models/EmailActivation.php

@@ -3,6 +3,7 @@ namespace common\models;
 
 use common\behaviors\DataBehavior;
 use common\behaviors\EmailActivationExpirationBehavior;
+use common\behaviors\PrimaryKeyValueBehavior;
 use common\components\UserFriendlyRandomKey;
 use yii\base\InvalidConfigException;
 use yii\behaviors\TimestampBehavior;
@@ -42,6 +43,12 @@ class EmailActivation extends ActiveRecord {
                 'class' => TimestampBehavior::class,
                 'updatedAtAttribute' => false,
             ],
+            [
+                'class' => PrimaryKeyValueBehavior::class,
+                'value' => function() {
+                    return UserFriendlyRandomKey::make();
+                },
+            ],
             'expirationBehavior' => [
                 'class' => EmailActivationExpirationBehavior::class,
                 'repeatTimeout' => 5 * 60, // 5m
@@ -84,26 +91,4 @@ class EmailActivation extends ActiveRecord {
         ];
     }
 
-    public function beforeSave($insert) {
-        if (!parent::beforeSave($insert)) {
-            return false;
-        }
-
-        if ($this->key === null) {
-            do {
-                $this->key = $this->generateKey();
-            } while ($this->isKeyExists($this->key));
-        }
-
-        return true;
-    }
-
-    protected function generateKey() : string {
-        return UserFriendlyRandomKey::make();
-    }
-
-    protected function isKeyExists(string $key) : bool {
-        return self::find()->andWhere(['key' => $key])->exists();
-    }
-
 }