如何为节点js中的每个帖子获取唯一的url

const { v4: uuidv4 } = require('uuid');

const postId = uuidv4();
const postUrl = `https://example.com/posts/${postId}`;

const mongoose = require('mongoose');

// 创建帖子模型
const PostSchema = new mongoose.Schema({
  title: String,
  content: String,
  url: String
});

const Post = mongoose.model('Post', PostSchema);

// 创建帖子并保存URL
const newPost = new Post({
  title: 'Example Post',
  content: 'This is an example post.',
  url: postUrl
});

newPost.save()
  .then(() => {
    console.log('Post created and URL saved.');
  })
  .catch((error) => {
    console.error('Error creating post:', error);
  });