Error: '_ts' field only supports 'expireAfterSeconds' option

Programming
, ,
1

I am using Cosmos DB version 3.6 as a session store in Node.js. I have the following code:

const expressSession = require("express-session");
const MongoStore = require("connect-mongo")(expressSession);
const store = new MongoStore({
        mongooseConnection: mongoose.connection,
        ttl:24 * 60 * 60 * 1000,
})

This code results in the following error message:

  (node:16068) UnhandledPromiseRejectionWarning: MongoError: The 'expireAfterSeconds' option is supported on '_ts' field only.

What is the solution for this problem?

2

The solution to this problem is to remove the ttl property from the MongoStore constructor options and instead use the expires property in the express-session options. The updated code should look like this:

const expressSession = require("express-session");
const MongoStore = require("connect-mongo")(expressSession);
const store = new MongoStore({
        mongooseConnection: mongoose.connection,
})
app.use(expressSession({
        secret: "my-secret",
        resave: false,
        saveUninitialized: false,
        store: store,
        cookie: {
                maxAge: 24 * 60 * 60 * 1000
        },
        expires: new Date(Date.now() + (24 * 60 * 60 * 1000))
}))

This will set the session expiration time to 24 hours and use the _ts field in Cosmos DB to automatically expire sessions.