Creating a Node.js API to upload CSV files to MongoDB

Many applications need to upload CSV files at some point to a database. This post will guide you through how to upload CSV files to MongoDB.

MongoDB is a document-oriented NoSQL database used for high volume data storage. Instead of using tables and rows as in the traditional relational databases, MongoDB makes use of collections and documents. Documents consist of key-value pairs which are the basic unit of data in MongoDB.

We will be using Express.js for server side.

Node modules that we are going to use:

Now, we need to create a schema for the CSV data that is to be stored in MongoDB.

To connect to MongoDB we need a MongoDB cluster link that should be placed in a .env file as shown:

Now we will make index.js file to make the API routes and complete the API:

Now create an empty folder named uploads in the same directory. multer will use this folder to place uploaded files.

Now, the API part is completed you can test this API using Postman or other services.

We need to create an index.html file to provide a structure to our application.

As a last step we need to create a javascript file to fetch the API we created.

Now after you keep index.html and app.js file in the same directory you can run index.html file and use it to upload csv files to MongoDB.

Final app:

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