Delve into building a GraphQL endpoint with Deno, compare technologies, configure queries, and integrate PostgresSQL and MongoDB databases to create a secure, high-performing application.

deno.tar.gz

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Deno is a modern and secure runtime for JavaScript. It was created by the same team that created Node.js. Deno offers better performance, security, and simplicity than any other JavaScript runtime.

In this course, you will start by understanding the different technologies used in Deno, such as Typescript. You will compare these technologies with JavaScript and GraphQL as well as learn their terminologies. Then, you will create your own endpoint with Deno and configure queries and mutations in it. Next, you will explore two different databases with Deno: first, you’ll learn how to set up an SQL database using PostgresSQL and then how to configure a NoSQL database using MongoDB to store documents and collections of on-demand data. Finally, you’ll put everything together to have a fully functioning GraphQL endpoint made with Deno and backed by PostgreSQL and MongoDB. 

After this course, you’ll be able to create a Deno application and a GraphQL endpoint while having a database of your choice to store data.

Building a GraphQL Endpoint with Deno

# Problem statement

For this challenge, let’s say we want to build a GraphQL endpoint for a car rental service that performs the following operations:

* Add, delete, and update a car in the list of available cars.

* Create a new car rental with the needed information.

* Create a user for the person renting a car.


# Playground

Implement and test your logic in the code widget below:


> **Tip:** To test your solution, you need to test the following mutations:  `addCar()`, `deleteCar()` and `addUser()`.

Challenge yourself by creating a basic GraphQL endpoint with Deno.

Introduction to Deno, TypeScript, and GraphQL

Creating a Basic GraphQL Endpoint

Databases and Deno

SQL: Postgres and Deno

NoSQL: Mongo and Deno

Wrapping Up

Appendix

Challenge: Creating a Basic GraphQL Endpoint

Problem statement