如何将 connect-mongo 版本 4x 与 express-session 一起使用。我收到错误答案

【问题标题】：how to use connect-mongo version 4x with express-session. I'm getting errors如何将 connect-mongo 版本 4x 与 express-session 一起使用。我收到错误
【发布时间】：2021-10-22 00:20:56
【问题描述】：

我在尝试在 MongoDB 上保存会话时遇到错误

const MongoStore = require('connect-mongo');

const connectDB = require('./config/db');
const { connection } = require('mongoose');
    app.use(
      session({
        secret: 'some secret',
        resave: false,
        saveUninitialized: true,
        store: MongoStore.create({
          client: connection,
        }),
        cookie: {
          maxAge: 1000 * 60 * 60 * 24,
        },
      })
    );

错误：

C:\Users\Tezz\Desktop\Express\PassportJsAuth\express-session-authenticator\node_modules\connect-mongo\build\main\lib\MongoStore.js:126 .db（选项.dbName） ^

TypeError: con.db 不是函数在 C:\Users\Tezz\Desktop\Express\PassportJsAuth\express-session-authenticator\node_modules\connect-mongo\build\main\lib\MongoStore.js:126:18

【问题讨论】：

标签： mongodb express mongoose express-session connect-mongo

【解决方案1】：

解决方案如下：

const express = require('express');
const session = require('express-session');
require('dotenv').config();

const MongoStore = require('connect-mongo');

const connectDB = require('./config/db');

const PORT = process.env.PORT || 3001;
const MONGO_URI = process.env.MONGODB;
const app = express();


//connectDB should return the client conn.connection.getClient();

const client = connectDB().then((mClient) => {
app.listen(PORT, () => console.log('Server running...');
return mClient;
}).catch(err => console.log(err));


app.use(express.json());
app.use(express.urlencoded({ extended: true}));
app.use(
  session({
    secret: 'some-secret',
    resave: false,
    saveUninitialized: true,
    store: MongoStore.create({
      client,
    }),
  })
);

app.get('/', (req, res, next) => {
  res.send('<h1>Hello World (sessions)</h1>');
});

```

【讨论】：