# 数据库迁移工具 ## 数据库迁移工具 首先通过 composer 安装 ``` composer require topthink/think-migration ``` 注意事项，不支持修改文件配置目录 - - - - - - 在命令行下运行查看帮助，可以看到新增的命令 ``` php think ``` ``` migrate migrate:create Create a new migration migrate:rollback Rollback the last or to a specific migration migrate:run Migrate the database migrate:status Show migration status optimize optimize:autoload Optimizes PSR0 and PSR4 packages to be loaded wit h classmaps too, good for production. optimize:config Build config and common file cache. optimize:route Build route cache. optimize:schema Build database schema cache. seed seed:create Create a new database seeder seed:run Run database seeders ``` 创建迁移类，首字母必须为大写 ``` php think migrate:create Users ``` 可以看到目录下有新文件 .\\database\\migrations\\20161117144043\_users.php #### 使用实例 ``` <?php use Phinx\Migration\AbstractMigration; class Users extends AbstractMigration { /** * Change Method. */ public function change() { // create the table $table = $this->table('users',array('engine'=>'MyISAM')); $table->addColumn('username', 'string',array('limit' => 15,'default'=>'','comment'=>'用户名，登陆使用')) ->addColumn('password', 'string',array('limit' => 32,'default'=>md5('123456'),'comment'=>'用户密码')) ->addColumn('login_status', 'boolean',array('limit' => 1,'default'=>0,'comment'=>'登陆状态')) ->addColumn('login_code', 'string',array('limit' => 32,'default'=>0,'comment'=>'排他性登陆标识')) ->addColumn('last_login_ip', 'integer',array('limit' => 11,'default'=>0,'comment'=>'最后登录IP')) ->addColumn('last_login_time', 'datetime',array('default'=>0,'comment'=>'最后登录时间')) ->addColumn('is_delete', 'boolean',array('limit' => 1,'default'=>0,'comment'=>'删除状态，1已删除')) ->addIndex(array('username'), array('unique' => true)) ->create(); } /** * Migrate Up. */ public function up() { } /** * Migrate Down. */ public function down() { } } ``` 对于同一个数据表，如果需要新的迁移动作，例如删除字段、创建字段，可以创建新的更改文件，像svn一样往前记录操作，方便回滚。 更具体的使用可查看 <http://docs.phinx.org/en/latest/>