Updates writing-migrations.md

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Author: tsy12321

writing-migrations.md

@@ -8,3 +8,58 @@ Phinx 使用迁移脚本来管理数据库。 每个迁移脚本都是一个 PHP
 
 让我们从创建一个新的 Phinx 迁移脚本开始。使用 `create` 命令：
 
+```
+$ php vendor/bin/phinx create MyNewMigration
+```
+
+这将创建一个新的迁移脚本，格式是 `YYYYMMDDHHMMSS_my_new_migration.php` ，前14个字符是当前的timestamp，精确到秒。
+
+
+
+如果你指定了多个脚本路径，将会提示你选择哪一个。
+
+
+
+Phinx 自动创建的迁移脚本框架有一个方法：
+
+
+
+```
+<?php
+
+use Phinx\Migration\AbstractMigration;
+
+class MyNewMigration extends AbstractMigration
+{
+    /**
+     * Change Method.
+     *
+     * Write your reversible migrations using this method.
+     *
+     * More information on writing migrations is available here:
+     * http://docs.phinx.org/en/latest/migrations.html#the-abstractmigration-class
+     *
+     * The following commands can be used in this method and Phinx will
+     * automatically reverse them when rolling back:
+     *
+     *    createTable
+     *    renameTable
+     *    addColumn
+     *    renameColumn
+     *    addIndex
+     *    addForeignKey
+     *
+     * Remember to call "create()" or "update()" and NOT "save()" when working
+     * with the Table class.
+     */
+    public function change()
+    {
+
+    }
+}
+```
+
+
+
+
+