GraphQL in Rust: Building Modern APIs

GraphQL is a modern query language for APIs that allows clients to get exactly the data they need, and nothing extra. Rust is a systems programming language known for its performance and safety. The book "GraphQL in Rust" combines these two powerful technologies, offering a practical guide to building efficient, secure, and scalable web services.

This edition is intended for developers who are already familiar with the basics of Rust and want to master a modern approach to building APIs. You will learn how to use the Rust ecosystem to implement GraphQL servers capable of handling thousands of requests per second with minimal memory consumption.

What you will learn from the book:

• GraphQL basics: types, schemas, queries, mutations, and subscriptions.
• Working with two main libraries: Juniper (mature, proven) and Async-GraphQL (asynchronous, modern).
• Integration with popular web frameworks: Actix-web, Axum, Warp.
• Schema design for complex domain models.
• Error handling and input validation.
• Authorization and authentication: JWT, RBAC, middleware.
• Working with databases: PostgreSQL, SQLite, MongoDB via Diesel and SQLx.
• Query optimization: N+1 problem and dataloader.
• Testing: unit tests, integration tests, mock objects.
• Deployment: Docker, CI/CD, monitoring, and logging.

Book structure:

• Part I. Introduction. Overview of GraphQL and Rust, environment setup.
• Part II. Basics. Creating your first schema, types, queries, mutations.
• Part III. Advanced Topics. Subscriptions, custom scalars, directives, federation.
• Part IV. Integrations. Databases, caching, external APIs.
• Part V. Production. Testing, security, deployment, monitoring.

Each chapter contains practical code examples that you can run and test immediately. You will build a complete project — a GraphQL server for a task management system that includes all key aspects of a real application: authentication, database interaction, pagination, filtering, and real-time subscriptions.

The book will be useful both for backend developers looking to switch to Rust and for experienced Rustaceans who want to expand their toolkit for building web services. Thanks to its clear structure and abundance of examples, you will be able to quickly apply the knowledge gained in practice.

Master the creation of modern, high-performance, and reliable APIs with Rust and GraphQL — and your next project will be faster, more secure, and more user-friendly.