javascript - 如何在 Express 中设置更新路线

Question

我正在构建一个 MEVN 堆栈 CRUD 应用程序(Vue、Node、Express、MongoDB)。我正在尝试为我的应用程序设置以下 Express 路线...

postRoutes.post('/update/:id', async(req, res)=> {
    const collection = await loadPostsCollection();
    let id = req.params.id;
    let result = await collection.findOne(req.params.id)
    if (!result) {
      res.status(404).send("data is not found");
    }
    else {
        result.title = req.body.title;
        result.body = req.body.body;
        result.updateOne();
    }
});

..为了根据数据的 id 更新特定数据。点击前端的更新按钮并触发 updatePost() 方法后...

    updatePost() {
      let uri = `http://localhost:4000/posts/update/${this.$route.params.id}`;
      this.axios.post(uri, {
        title: this.post.title,
        body: this.post.body
      }).then(() => {
        this.$router.push({name: 'posts'});
      });
    }

...上面的快速路线不执行。我也尝试像这样配置路线...

postRoutes.post('/update/:id', async(req, res)=> {
    const collection = await loadPostsCollection();
    let id = req.params.id;
    let result = await collection.findOne({
      _id: new mongodb.ObjectId(id)
    });
    if (!result) {
      res.status(404).send("data is not found");
    }
    else {
        result.title = req.body.title;
        result.body = req.body.body;
        result.updateOne();
    }
});

但这也不起作用。知道如何设置更新路线吗？

这是我的所有路线:

const express = require('express');
const postRoutes = express.Router();
const mongodb = require('mongodb')

postRoutes.get('/', async (req, res) => {
  const collection = await loadPostsCollection();
  res.send(await collection.find({}).toArray());
});

postRoutes.post('/add', async (req, res) => {
  const collection = await loadPostsCollection();
  let task = req.body;
  await collection.insertOne(task);
  res.status(201).send();
});

postRoutes.get("/edit/:id", async (req, res) => {
  const collection = await loadPostsCollection();
  let id = req.params.id;
  let result = await collection.findOne({
    _id: new mongodb.ObjectId(id)
  });
  if (!result) {
    return res.status(400).send("Not found");
  }
  res.status(200).send(result);
});

postRoutes.post('/update/:id', async(req, res)=> {
    const collection = await loadPostsCollection();
    let id = req.params.id;
    let result = await collection.findOne({
      _id: new mongodb.ObjectId(id)
    });
    // let result = await collection.findOne(req.params.id)
    if (!result) {
      res.status(404).send("data is not found");
    }
    else {
        result.title = req.body.title;
        result.body = req.body.body;
        result.updateOne();
    }
});

postRoutes.delete('/delete/:id', async (req, res, next) => {
  const collection = await loadPostsCollection();
  collection.deleteOne({ _id: mongodb.ObjectId(req.params.id) });
  res.status(200).send({});
});

async function loadPostsCollection() {
  const client = await mongodb.MongoClient.connect(
    'mongodb+srv://jsfanatik:1qaz2wsx@cluster0-lv686.mongodb.net/test?retryWrites=true&w=majority',
    {
      useNewUrlParser: true
    }
  );
  return client.db("test").collection("todos")
}

module.exports = postRoutes;

Answer 1

您请求的 URL 是 /posts/update/:id 但我在任何 Express 路由器中都没有看到该路径。您的路由器中缺少/posts

postRoutes.post('/update/:id', async(req, res)=> {
    const collection = await loadPostsCollection();
    let id = req.params.id;
    let result = await collection.findOne(req.params.id)
    if (!result) {
      res.status(404).send("data is not found");
    }
    else {
        result.title = req.body.title;
        result.body = req.body.body;
        result.updateOne();
    }
});