/**
  * @return \yii\db\ActiveQuery
  */
 public function getChecks()
 {
     return $this->hasMany(Check::className(), ['id' => 'checkId'])->viaTable('check_has_loyalty', ['loyaltyId' => 'id']);
 }
 /**
  * @return \yii\db\ActiveQuery
  */
 public function getChecks()
 {
     return $this->hasMany(Check::className(), ['id' => 'checkId'])->viaTable('check_has_product', ['productId' => 'id']);
 }