Every Second Run Throws: Mongoerror: Topology Was Destroyed

I am building a REST API but every second time I load my site I get a MongoError: Topology was destroyed. Can someone help me fixing this? I have a feeling that there is something

Solution 1:

I would suggest the use Mongoose

you are creating DB connection for every request, which is not the correct way

const MongoClient = require('mongodb').MongoClient;
// Connection URL
const url = 'mongodb://localhost:27017';

// Database Name
const dbName = '<some db>';

// Use connect method to connect to the server
let db;
MongoClient.connect(url, function (err, client) {
    assert.equal(null, err);
    console.log("Connected successfully to server");
    db = client.db(dbName);
});


app.get("/api/:object", async(req, res) => {
    const collection = db.collection(req.params["object"]);
    let result = await collection.find().toArray();
    res.send(result);
});