const mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/text', {
useNewUrlParser: true,
useUnifiedTopology: true
}).then(() => {
console.log("数据库链接成功");
}).catch(err => {
console.log(err);
})
const userSchema = new mongoose.Schema({
name: String
})
const postSchema = new mongoose.Schema({
title: String,
author: {
type: mongoose.Schema.Types.ObjectId,
ref: 'user'
}
})
const User = mongoose.model('user', userSchema);
const Post = mongoose.model('post', postSchema);
Post.find().populate('author').then(re => {
console.log(re);
})