如何在帖子中显示评论。使用Node、express和mongodb

npm init -y

npm install express mongoose body-parser

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');

mongoose.connect('mongodb://localhost/comments', { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => console.log('Connected to MongoDB'))
  .catch(err => console.error('Failed to connect to MongoDB', err));

const commentSchema = new mongoose.Schema({
  text: String,
  author: String
});

const Comment = mongoose.model('Comment', commentSchema);

const app = express();
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

app.get('/comments', (req, res) => {
  Comment.find({}, (err, comments) => {
    if (err) {
      res.status(500).send(err);
    } else {
      res.json(comments);
    }
  });
});

app.post('/comments', (req, res) => {
  const { text, author } = req.body;
  const newComment = new Comment({ text, author });

  newComment.save((err, comment) => {
    if (err) {
      res.status(500).send(err);
    } else {
      res.json(comment);
    }
  });
});

const port = 3000;
app.listen(port, () => {
  console.log(`Server is running on port ${port}`);
});

node app.js