addSql('ALTER TABLE blog ADD slug VARCHAR(255) NOT NULL, CHANGE title title VARCHAR(255) DEFAULT NULL, CHANGE content content LONGTEXT DEFAULT NULL, CHANGE created_at created_at DATETIME DEFAULT NULL'); } public function down(Schema $schema): void { // this down() migration is auto-generated, please modify it to your needs $this->addSql('ALTER TABLE blog DROP slug, CHANGE title title VARCHAR(255) CHARACTER SET utf8mb4 NOT NULL COLLATE `utf8mb4_unicode_ci`, CHANGE content content LONGTEXT CHARACTER SET utf8mb4 NOT NULL COLLATE `utf8mb4_unicode_ci`, CHANGE created_at created_at DATETIME NOT NULL'); } }