使用 async/await 语法

我们可以使用最新的 ES8（ES2017）功能，并使用 async / await 语法代替：

import { createConnection } from "typeorm";
import { Photo } from "./entity/Photo";
createConnection(/*...*/)
  .then(async connection => {
    let photo = new Photo();
    photo.name = "Me and Bears";
    photo.description = "I am near polar bears";
    photo.filename = "photo-with-bears.jpg";
    photo.views = 1;
    photo.isPublished = true;
    await connection.manager.save(photo);
    console.log("Photo has been saved");
  })
  .catch(error => console.log(error));