A simple MongoDB wrapper for an Express server.

mongo.js

let DB_URL = ""
let DB_NAME = ""

const { MongoClient } = require("mongodb");
const client = new MongoClient(DB_URL);

let mongo = {
  db: null,
  collections: {},
};

const connect = async function () {
  await client.connect();

  mongo["db"] = await client.db(DB_NAME);
  mongo["collections"] = await client
    .db(global.DB_NAME)
    .listCollections()
    .toArray();

  return mongo;
};

module.exports = { connect, mongo };

MongoDB-wrapper.js

const { mongo } = require("./mongo");
const db = mongo.db;

// collection - The name of the collection to perform operation on
// body - req.body or an object with data to insert/update in a table
// query - Filter to find document in the table i.e { username: "DMDBOI" }

const database = {
  create: async function (collection, body) {
    let document = await db
      .collection(collection)
      .insertOne(body, { safe: true });

    return document;
  },

  find: async function (collection, query) {
    let document = await db.collection(collection).findOne(query);
    return document;
  },

  update: async function (collection, query, body) {
    let document = await db
      .collection(collection)
      .findOneAndUpdate(query, { $set: body }, { safe: true });

    return document;
  },

  delete: async function (collection, query) {
    let document = await db
      .collection(collection)
      .deleteOne(query, { safe: true });

    return document;
  },
};

module.exports = database;

Used to reduce code needed to interact with MongoDB using Mongoose.
This removes the need to import models and write individual CRUD operations per collection.