Node.js try 运行迁移时的 Typeorm：缺少必需的参数：dataSource

发布于04月12日

我试着用ormconfig.json个这样的

{
  "name": "default",
  "type": "postgres",
  "host": "ip-is-here",
  "port": 5432,
  "username": "name",
  "password": "12345",
  "database": "db1",
  "synchronize": false,
  "logging": false,
  "entities": ["dist/storage/**/*.js"],
  "migrations": ["dist/storage/migrations/**/*.js"],
  "cli": {
    "entitiesDir": "src/storage",
    "migrationsDir": "src/storage/migrations"
  }
}

via yarn typeorm migration:run
But get an error:

Missing required argument: dataSource

我该怎么办？

推荐答案

TypeForm放弃了使用ormconfig.更晚版本的json.你应该使用新的轴.创建ormconfig.ts并为您的数据库指定选项，在我的例子中，其外观如下:

    export const connectionSource = new DataSource({
        migrationsTableName: 'migrations',
        type: 'postgres',
        host: 'localhost',
        port: 5432,
        username: 'user',
        password: 'pass',
        database: 'somehealthchecker',
        logging: false,
        synchronize: false,
        name: 'default',
        entities: ['src/**/**.entity{.ts,.js}'],
        migrations: ['src/migrations/**/*{.ts,.js}'],
        subscribers: ['src/subscriber/**/*{.ts,.js}'],
    });

运行连接后

    await connectionSource.initialize();

然后你可以通过使用

    const myRepo = connectionSource.getRepository(SomeEntity)

还有你的脚本.json应该类似于此示例

"migration:generate": "./node_modules/.bin/ts-node ./node_modules/.bin/typeorm migration:generate -d src/modules/config/ormconfig.ts",
"migration:up": "./node_modules/.bin/ts-node ./node_modules/.bin/typeorm migration:run -d src/modules/config/ormconfig.ts",
"migration:down": "./node_modules/.bin/ts-node ./node_modules/.bin/typeorm migration:revert -d src/modules/config/ormconfig.ts",

在命令之后，只需在控制台中给出迁移的名称，而不使用-n选项