This repo shows how to build a GraphQL server with TypeScript and the following technologies:

• Fastify: Fast and low overhead web framework, for Node.js
• Mercurius: GraphQL adapter for Fastify
• Nexus: Declarative, Code-First GraphQL Schemas for JavaScript/TypeScript
• Prisma: Next-generation ORM for type-safe interaction with the database
• PostgreSQL: powerful, open source object-relational database system with over 30 years of active development.
• Sentry: an error tracking and monitoring tool.
• Altair GraphQL: GraphQL Web Client (similar to GraphQL Playground)

The project is written in TypeScript and attempts to maintain a high degree of type-safety by leveraging Prisma and GraphQL.

Play with a deployed version of this API: https://fastify-prisma.up.railway.app/altair

The database schema is defined using the Prisma schema which defines 3 models:

• User
• Post
• Comment

The GraphQL schema is defined with Nexus using the code-first approach.

The relevant files are:

• ./src/schema.ts: Source of truth for the schema in TypeScript
• ./schema.graphql: Generated GraphQL scehma

• A PostgreSQL DB

1. clone repo
2. create .env file and define DATABASE_URL and SENTRY_DSN
3. npm install
4. npm run migrate:dev to run shcema migrations with Prisma Migrate
5. npm run dev to start dev server and run the API