mongoose5的简单使用

const mongoose = require('mongoose')
const url = 'mongodb://127.0.0.1:27017';
const options = { useNewUrlParser: true, useUnifiedTopology: true, dbName: 'GameCityCF', user: 'user', pass: 'zH_user*3343' };
mongoose.connect(url,options);
mongoose.connection.on('error', function (error) {
  console.log('数据库连接失败：' + error);
});
mongoose.connection.on('open', function () {
  console.log("------数据库连接成功！------");
});
mongoose.connection.on('close', function () {
  console.log("------数据库关闭连接！------");
});
mongoose.connection.on('connected', () => console.log('mongo connect success'));

// 定义一个模式
const Schema = mongoose.Schema;

// 创建Schema（模式）对象
var stuSchema = new Schema({
  name: String,
  age: Number,
  gender: {
    type: String,
    default: 'male'
  },
  addr: String
})

//映射 创建模型
const studentModel = mongoose.model('student', stuSchema)

const user = new studentModel({
  name: "小明",
  age: "20",
  addr: "天津"
})

// user.name="小王"
console.log(user)
user.save(function (err) {
  if (err) {
    return console.log(err);
  }
  // 已保存
  console.log('数据写入成功')
  mongoose.connection.close()
});