feat: database migration

ormconfig.ts

@@ -0,0 +1,26 @@
+// TypeORM configuration file
+// database migration
+
+import { DataSource } from 'typeorm';
+
+// 控制台执行 npx typeorm migration:create path-to-migrations-dir/migrationName
+// 创建迁移文件
+// npx typeorm migration:run -- -d path-to-datasource-config 进行迁移
+
+// 这个迁移太坑了，暴露的对象必须是 DataSource 实例，而不能是 ormconfig.js 中的普通对象
+// 因此执行命令是 npx typeorm-ts-node-commonjs migration:run -d ormconfig.ts
+
+// 同理，revert 命令是： npx typeorm-ts-node-commonjs migration:revert -d ormconfig.ts
+// px typeorm -ts-node-commonjs migration:generate src/migrations/SchemaSync -d ormconfig.ts
+
+export default new DataSource({
+  migrationsTableName: 'migrations',
+  type: 'postgres',
+  host: 'localhost',
+  port: 5432,
+  username: 'postgres',
+  password: 'pass123',
+  database: 'postgres',
+  entities: ['src/**/**.entity{.ts,.js}'],
+  migrations: ['src/migrations/**/*{.ts,.js}'],
+});

src/coffees/entities/coffee.entity.ts

@@ -16,6 +16,9 @@ export class Coffee {
   @Column()
   name: string;
 
+  @Column({ nullable: true })
+  description: string;
+
   @Column()
   brand: string;
 

src/migrations/1699107959878-CoffeeRefactor.ts

@@ -0,0 +1,15 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class CoffeeRefactor1699107959878 implements MigrationInterface {
+  public async up(queryRunner: QueryRunner): Promise<any> {
+    await queryRunner.query(
+      `ALTER TABLE "coffee" RENAME COLUMN "name" TO "title"`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<any> {
+    await queryRunner.query(
+      `ALTER TABLE "coffee" RENAME COLUMN "title" TO "name"`,
+    );
+  }
+}

src/migrations/1699111223775-SchemaSync.ts

@@ -0,0 +1,15 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+export class SchemaSync1699111223775 implements MigrationInterface {
+  name = 'SchemaSync1699111223775';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(
+      `ALTER TABLE "coffee" ADD "description" character varying`,
+    );
+  }
+
+  public async down(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`ALTER TABLE "coffee" DROP COLUMN "description"`);
+  }
+}