Question

我们在 node.js 应用程序中使用 typeorm，似乎在启动时加载实体会增加大量时间。或者 db 模式相当小/简单，但是加载应用程序似乎需要 2 分钟以上。如果我传递一个空数组（没有实体），那么应用加载速度会明显加快。

如何在 typeorm 中启用登录以进行初始化？
有没有办法减少加载时间？

export const entities = [
  Account,
  Bundle,
  Category,
  Customer,
  Device,
  Event,
  EventMember,
  GoldrushMasterEvent,
  Order,
  Organization,
  OrganizationGroup,
  Province,
  Role,
  Ticket,
  TicketPackage,
  SalesReportView,
  User,
  SystemConfig,
  TicketDetailsView,
  EventMemberSalesView,
  Invoice,
  InvoiceItem,
  InvoiceItemCode,
  EventSalesView,
  OrderDetailsView
];

export interface DatabaseConnectionOptions {
  connectionName?: string;
  username: string;
  password: string;
  host: string;
  port: number;
  database: string;
  maxPoolSize: number;
}

/**
 * Uses type orm to connect to the RDS instance
 *
 * @param options
 */
const connectDatabase = async (options: DatabaseConnectionOptions): Promise<void> => {
  const dbConfig: ConnectionOptions = {
    name: options.connectionName,
    type: 'postgres',
    schema: 'public',
    entities: entities,
    synchronize: false,
    logging: process.env.DB_LOGGING === 'true',
    logger: 'advanced-console',
    username: options.username,
    password: options.password,
    host: options.host,
    port: options.port,
    database: options.database,
    extra: {
      max: options.maxPoolSize
    },
    // log anything that takes more than a second
    maxQueryExecutionTime: 1000
  };

  await createConnection(dbConfig);
};

typeorm 加载实体真的很慢

0 个答案: