How do I execute MongoDB shell query using NodeJS - node.js

Question

I know we have various packages avalable on GitHub to query MongoDB using NodeJS. They don't solve my use case. I am looking to execute MongoDB Shell commands from NodeJS which are different from MongoDB NodeJS commands
Example: NodeJS
db.collection('user').find({})
Example: MongoDB Shell
db.getCollection('user').find({})
Notice 'collection' and 'getCollection' are different.
I want to save MongoDB Shell queries as text. How do I execute those queries once I have read them from the database?

Answer 1

Try this adapted from the MongoDB documentation:
const { MongoClient } = require("mongodb");
// Replace the uri string with your MongoDB deployment's connection string.
const uri =
"mongodb+srv://<user>:<password>#<cluster-url>?w=majority";
const client = new MongoClient(uri);
async function run() {
try {
await client.connect();
const db = client.db("myDatabase");
const result = await db.getCollection('user').find({});
console.log(result);
} finally {
await client.close();
}
}
run().catch(console.dir);

Answer 2

You can use child_process library of NodeJs but it is litte bit tricky. You must wait for mongo shell to finish its words.
const { spawn } = require("child_process");
const child = spawn("/usr/bin/mongo");
setTimeout(() => {
child.stdin.write("show dbs\n");
}, 5000);
child.stdout.on("data", (data) => {
console.log(`command line says:\n${data}`);
});

Answer 3

Lets Try this code -
let { MongoClient } = require('mongodb');
const url =
`mongodb+srv://${process.env.DB_USER}:${process.env.DB_USER_PASSWORD}#
${process.env.DB_CLUSTER}.mongodb.net`;
async function connectDatabase() {
const client = await MongoClient.connect(url, {
useNewUrlParser: true,
useUnifiedTopology: true
});
const db = client.db("main");
return {
listings: db.collection("test_listings")
};
};
module.exports = { connectDatabase };