            'docUrl' => $this->string(200)->notNull()->comment('文档地址'),
            'viewCount' => $this->integer()->notNull()->defaultValue(0)->comment('浏览量'),
            'deleted' => 'enum("Y", "N") not null default "N" comment "删除标识"',
            'createdAt' => $this->integer()->comment('创建时间'),
            'updatedAt' => $this->integer()->comment('更新时间'),
        ], $this->tableOptions . ' comment "项目表"');
    }

    public function down()
    {
        $this->dropTable($this->tableName);