增加 迁移回滚功能实现

server/migrations/004_createFileCategoryTable.ts

@@ -0,0 +1,26 @@
+import type { MigrationLiveDefinition } from '@d8d-appcontainer/types'
+import { DeleteStatus } from '../../client/share/types.ts'
+
+const createFileCategoryTable: MigrationLiveDefinition = {
+  name: "create_file_category_table",
+  up: async (api) => {
+    await api.schema.createTable('file_categories', (table) => {
+      table.increments('id').primary();
+      table.string('name').notNullable().comment('分类名称');
+      table.string('code').notNullable().unique().comment('分类编码');
+      table.text('description').comment('分类描述');
+      table.integer('is_deleted').defaultTo(DeleteStatus.NOT_DELETED).comment('是否被删除 (0否 1是)');
+      table.timestamps(true, true);
+      
+      // 添加索引
+      table.index('name');
+      table.index('code');
+      table.index('is_deleted');
+    });
+  },
+  down: async (api) => {
+    await api.schema.dropTable('file_categories');
+  }
+}
+
+export default createFileCategoryTable;