Express.js和connect-mongo会话“ TypeError：无法读取未定义的属性'upserted'”

Question

I am trying to store sessions using connect-mongo module, however I get the following Error:

TypeError: Cannot read property 'upserted' of undefined

The usage of connect-mongo looks as follows:

import session from 'express-session';
const MongoStore = require('connect-mongo')(session);

app.use(session({
  secret: 'SECRET',
  store: new MongoStore({ url: 'mongodb://mongo:27017/sessions' }),
  saveUninitialized: true,
  resave: false
}));

At the same time, I can see that session entries are being created on every page reload with the following contents:

{
  "_id": "zO68C8OuARTUblw3EqHfUikR_IIHRaQq",
  "session": "{\"cookie\": \"originalMaxAge\":null,\"expires\":null,\"httpOnly\":true,\"path\":\"/\"    }}",
  "expires": new Date(1470779765287)
}

And the expiration date is set to 14 days from the creation timestamp (default value)

Package versions used:

"cookie-parser": "^1.4.3",
"connect-mongo": "^1.3.1",
"express": "~4.0.0",
"express-session": "^1.14.0",

Answer 1

我在connect-mongo信息库上打开了一个问题 ，确实，该问题已在最新版本1.3.2中解决：)