Posted on Sep 3, 2022

Simple MongoDB Database Setup for Discord.JS (Replit)

#javascript #node #discord #mongodb

Here's an easy implementation of MongoDB in a Discord.JS bot built on Replit! Be sure to follow the steps closely or you might miss something.

Requirements

1. You'll need discord.js installed of-course, I prefer using v14 but you can use an older version if you haven't upgraded yet.
2. Lastly, you'll need a MongoDB database set up. Make sure you have 0.0.0.0 whitelisted in the IP addresses so it will work with Replit.

🍃 MongoDB is a free database on the cloud that we'll use in this tutorial. It's very easy-to-use and it has a free tier!

Step 1

Create a "models" folder in your bot, we'll use this to store all the databases in.

Step 2

IMPORTANT: Create a environment variable called mongodb and put your database's connection URI in there. It should look something like this: mongodb+srv://username:password@cluster0.clusters.mongodb.net/?retryWrites=true&w=majority

Don't use the example I provided, put your own, it won't work. If you don't have a MongoDB, you can create on at MongoDB.

In your index.js file, include this:

const mongoose = require('mongoose');

mongoose.connect(process.env.mongodb, { useNewUrlParser: true, useUnifiedTopology: true }).then(console.log('Connected to Mongodb.'));

In the code above, we're connecting to your MongoDB database.

Step 3

Back to the models folder. Create a file in there with any name you want, I'll use "keys.js" for my example.

In the file, import the schema which you'll use later on.

const mongo = require('mongoose');

const Schema = new mongo.Schema({
  Guild: Number,
  SpecialKey: String
});

Here, we're specifying the basic schema that we'll use for the database. You can change this to fit your bot's functionalities.

Finally, export the schema as follows:

module.exports = mongo.model('yourdatabasename', Schema);

Add that to the bottom of the file! 😃

If you don't know how to make your own schema, you can view some examples here.

Step 4

This is the final step! Go to your bot's command cog you want to use the database in and follow these steps:

Import the database:

const Schema = require('../../models/keys.js'); // Example

Then in your command, you can fetch values as follows:

Schema.findOne({ Guild: interaction.guild.id }, async (err, data) => {
  if (data) {
    respond({"content": `This server's special key is: ${data["SpecialKey"]}!`});
  } else {
    new Schema ({
      Guild: interaction.guild.id,
      SpecialKey: "Examples ✨"
    }).save()

    respond({"content": `Woah! This server doesn't have a key yet 👀 I've just set yours to the default key instead!`});
  }
});