Postgresql如果没有UUID-OSSP，然后创建这个UUID-OSSP扩展

import { MigrationInterface, QueryRunner } from 'typeorm';

export class EnableUuid1551426026001 implements MigrationInterface {

  public async up(queryRunner: QueryRunner): Promise<any> {
    await queryRunner.query(`
        CREATE EXTENSION IF NOT EXISTS "uuid-ossp"`,
    );
  }

  public async down(queryRunner: QueryRunner): Promise<any> {
  }
}

Postgresql如果没有UUID-OSSP，然后创建这个UUID-OSSP扩展

官方文档：​​https://www.postgresql.org/docs/9.3/uuid-ossp.html​​