TypeError: Cannot read property 'databaseName' of undefined

node.js mongodb mongoose connect

It might be a problem with the 'express.bodyParser()', you have to define your connections AFTER all the configuration of your app.

node.js mongodb mongoose connect

In db.js,

module.exports = mongoose.connections;

change to:

module.exports = mongoose.connections[0];

node.js mongodb mongoose connect

You can just reuse the db object already instantiated by mongoose!

new MongoStore({  db: mongoose.connection.db})

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