MongoDB 模型未通过模式嵌入对象连接

Question

I am working on a blog app. Here one user has a one-to-many relationship with posts.After creating the basic CRUD I wanted to make a profile page featuring all the posts of a single User. I am following all the steps but still when I fetch all users I get empty array of Post.

And also I am trying to get user name in each post instead of only ID. I am using Populate but still getting only user id back.

 router.get('/', auth, async (req, res) => { try { const Posts = await Post.find().sort({ date: -1 }).populate('users'); res.json(Posts); } catch (err) { console.error(err.message); res.status(500).send('Server Error'); } });

Here's my user schema

 const mongoose = require('mongoose'); const UserSchema = new mongoose.Schema({ name: { type: String, required: true }, posts: [ { type: mongoose.Schema.Types.ObjectId, ref: 'Post' } ], email: { type: String, required: true, unique: true }, password: { type: String, required: true }, date: { type: Date, default: Date.now } }); const User = mongoose.model('user', UserSchema); module.exports = User;

Here's Post Schema

 const mongoose = require('mongoose'); const PostSchema = new mongoose.Schema({ user: { type: mongoose.Schema.Types.ObjectId, ref: 'User' }, title: { type: String, required: true }, content: { type: String, required: true }, date: { type: Date, default: Date.now } }); const Post = mongoose.model('post', PostSchema); module.exports = Post;

Answer 1

I am following all the steps but still when I fetch all users I get empty array of Post

When you add a new post you must also update the posts field of the userSchema :

const newPost = await Post.insert(/* post */);
await User.findOneAndUpdate({ _id: newPost.user }, { $push: { posts: newPost._id }, { new: true });

And also I am trying to get user name in each post instead of only ID. I am using Populate but still getting only user id back

Try .populate('user'); without s