Mongoose connect to multiple databases

Question

I have a node js application with many files. Three of them have the following declarations respectively:

mongoose2.connect("mongodb://localhost:27017/terms");
mongoose.connect("mongodb://localhost:27017/results");
mongoose.connect("mongodb://localhost:27017/users");

The problem is that this for some reason does not work. The data are saved in database, but mongoose is confused and each time they are saved randomly among terms, results and users. Do you know why this is happening and a workaround maybe ?

Possible duplicate of Mongoose and multiple database in single node.js project — Arif Khan
– Arif Khan, Commented Sep 24, 2019 at 9:41
Make sure to read beyond the accepted answer on the linked answer, is there is a better answer — Rogier Spieker
– Rogier Spieker, Commented Sep 24, 2019 at 9:48

nico · Accepted Answer · 2019-09-24 10:51:18Z

1

Instead of creating 3 separate mongo connections it's better to switch between dbs using useDb() method.

const mongoose = require("mongoose");
const termsConn = mongoose.createConnection("mongodb://localhost:27017/terms");
//... code

const resultsConn = temmsConn.useDb("results");
console.log(resultsConn.name); // => results

answered Sep 24, 2019 at 10:51

nico

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