addSql('SELECT 1'); if (!$this->hasCascadeDelete('FK_PRODUCTUUID')) { $sql = <<addSql($sql); } if (!$this->hasCascadeDelete('FK_ATTRIBUTEID')) { $sql = <<addSql($sql); } } public function down(Schema $schema): void { $this->throwIrreversibleMigrationException(); } private function hasCascadeDelete(string $fkName): bool { $sql = <<connection->fetchOne(\sprintf($sql, $fkName, $this->connection->getDatabase())); return $deleteRule === 'CASCADE'; } }