koa异步等待与ajax一起使用时不工作，并承诺

Question

我使用koa作为rest后端，但当使用axios调用URL时，无法使路由和请求/响应正常工作。

server.js

const route = require('koa-route');
const serve = require('koa-static');
const Koa = require('koa');
const app = new Koa();
const path = require('path');
const bodyParser = require('koa-bodyparser');
const Datastore = require('nedb'),
      db = new Datastore({
          filename: __dirname +'/storage.db' ,
          autoload: true
      });
// something 
app.use(bodyParser());

app.use(serve(__dirname + '/dist'));

app.use(route.get('/api/projects', async function (next) {
    let projects = [];
    await db.find({}, function (err, docs) {
        projects = docs;
    });

    this.body = projects;
}));

const PORT = process.argv[2] || process.env.PORT || 3000;
app.listen(3000);

当我使用axios向/api/project发出请求时，我得到和空数组

从我的package.json

"scripts": {
    "start": "nodemon server.js --exec babel-node --presets es2015,stage-2"
  },

Answer 1

你把承诺和回调混为一谈，这很可能导致你的问题。

坚持使用承诺：

app.use(route.get('/api/projects', async function (next) {
  let projects = await db.find({});
  this.body = projects;
}));