如何在 Node 中使用 Mongoose 进行发布请求

我正在按照教程 () 构建 API，但它是 2 年前的我似乎不能完全更改代码以适应库中的最新更新。我能够得到工作的 get 请求，但不能得到 post。当我做

.post(addNewCoordinates);

我得到“错误：Route.post() 需要一个回调函数，但得到了一个[对象未定义]”

网上说要添加异步等待，我做了。我还缺少其他东西吗？？

我对 mongodb 的设置是我在指南针 GUI 中创建了一个数据库，实际上就是它。（从技术上讲，我在数据库中有一个集合）

这是我的 index.js

import express from 'express';
import routes from './src/routes/coordinatesRoutes';
import mongoose from 'mongoose';
import bodyParser from 'body-parser';

const app = express();
routes(app)
const PORT = 1234;
// Will print at localhost:{Port}
app.get('/', (req, res) =>
  res.send(`Node and express server running on port ${PORT}`)
)
// Will print in terminal
app.listen(PORT, () =>
console.log(`Your server is running on port ${PORT}`))

// Database Setup

// mongoose connection
mongoose.Promise = global.Promise;
mongoose.connect('mongodb://localhost:27017/coordinates', {
  useNewUrlParser: true,
  useUnifiedTopology: true
})
//bodyparser setup
app.use(bodyParser.urlencoded({ extended: true}));
app.use(bodyParser.json());

app.use(function(req, res, next) {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
  next();
});

坐标控制器.js：

import mongoose from 'mongoose';
import { InputDataSchema } from '../models/coordinatesModel'
const InputData = mongoose.model('InputData', InputDataSchema);
const addNewCoordinates = async  (req,res) => {
  let newCoordinates =  new InputData(req.body);
   await newCoordinates.save((err, coordinates) => {
    if (err) {
      res.send(err)
    }
    res.json(coordinates)
  })
}

export default addNewCoordinates;

坐标模型.js：

import mongoose from 'mongoose';
const Schema = mongoose.Schema;
export const InputDataSchema = new Schema({
  latitude: {
    type: Number,
    required: "Enter latitude"
  },
  longitude: {
    type: Number,
    required: "Enter longitude"
  },
  altitude: {
    type: Number,
    required: "Enter altitude"
  },
  ecef: {
    type: Array
  },
  created_date: {
    type: Date,
    default: Date.now
  }
})

坐标Route.js

import addNewCoordinates  from '../controllers/coordinatesController'
const routes = (app) => {
    //create route for donations
    app.route('/lla')
      //create get request
      .get((req, res) =>
      res.send('GET request successful!'))
      //create post request
      .post((req, res) =>
      res.set('POST request successful!'));
      // This crashes and gives me a Route.post() requires a callback function but got a [object Undefined] so I'm just trying to focus on getting a post without really any data.
     //.post(addNewCoordinates);

    // create a new route so you can get these donation entries by their ID's
    app.route('/lla/:timestamp')
      //create put request
      .put((req, res) =>
      res.send('PUT request successful!'))
      //create delete request
      .delete((req, res) =>
      res.send('DELETE request successful'))
  }
  export default routes;

感谢您的帮助！

JavaScript 中有两种导出方式，即

default exports

named exports

当您从 coordinatesController.js 导出时，它实际上是一个

default export

named export

导入默认导出的正确方法是没有

{..}

从导入 addNewCoordinates '../controllers/coordinatesController'

这也可以通过将其导出为

named

更多内容可以参考：MDN Docs for export