Graphql schema tutorial locations. To get data from a GraphQL schema, you need to write a GraphQL operation (a query) that selects the data and fields you need. graphqls but you can break it up into as many different files as you want. JSON to GraphQL Schema Generator Generate GraphQL schema definitions from JSON data. Jul 30, 2025 · What is GraphQL? What are its use cases? This article will introduce you to the basics of GraphQL, so if you want to learn more about it, don't miss out. Each field has a type of its own. The Spring Boot GraphQL starter automatically finds these schema files. We'll implement a GraphQL API using Strawberry and FastAPI. js: Defines resolver functions for the fields in the locations schema. The service includes this information in a document called the schema, which outlines all the things we're allowed to ask the service for. Use a schema-first approach to break down a user interface and design the schema for your 2. It is written in schema definition language (SDL). Define your schema gqlgen is a schema-first library — before writing code, you describe your API using the GraphQL Schema Definition Language. Building a GraphQL schema from scratch can be a daunting task, but with this tutorial, you’ll learn how to create a scalable and maintainable GraphQL API. GraphQL Java Overview GraphQL Java is the Java (server) implementation for GraphQL. Learn more about GraphQL schemas in the “Schema basics” section from the docs. And it isn’t tied to a specific database or storage engine — it works with your existing code and data, making it easier to evolve APIs over time. The tutorial also integrates GraphQL Playground for testing and debugging. Auto-generated Query and Mutation resolvers and provide seamless integration with the Relay framework. graphql: A schema that defines the types and fields owned by the locations subgraph. Introduction In this tutorial, we will learn how to connect Ent to GraphQL and set up the various integrations Ent provides, such as: Generating a GraphQL schema for nodes and edges defined in an Ent schema. To begin putting the pieces of our GraphQL server together, we need to take a closer look at Schema Definition Language, or SDL. Why do most APIs version? When there’s limited control over the data that’s Oct 24, 2025 · GraphQL (Graph Query Language) is the answer to many companies' data query problems. Learn how to setup a GraphQL server with TypeScript & Apollo as well as best practices for defining the GraphQL schema. What is a GraphQL operation and how you can use it. GraphQL Best Practices The GraphQL specification is intentionally silent on a handful of important issues facing APIs such as dealing with the network, authorization, and pagination. Ensure that all of your data is statically typed and these types inform what queries the schema What is GraphQL? GraphQL is a query language for APIs and a runtime for executing those queries against your data. Fields At its simplest, GraphQL is about asking for specific This tutorial will focus on how to implement a GraphQL server with this schema in Java. graph/schema. In this tutorial, we’re gonna build a Spring Boot GraphQL example with H2 database that will expose CRUD APIs to create, read, update and delete objects with the help of graphql-spring-boot-starter and Spring Data JPA. Learn the fundamentals of schemas and queries, then implement some apps with hands-on step-by-step tutorials. GraphQL by Example - Great course where you learn GraphQL by writing full-stack JavaScript applications with Node. This topic shows how to use the stepzen import mysql CLI command to introspect a MySQL database. Feb 27, 2025 · Learn how to create a GraphQL schema using TypeScript and Apollo Server. js that serves up a GraphQL endpoint. Further information can be found on the official GraphQL page. Create a GraphQL API for a MySQL database by letting API Connect for GraphQL introspect the database and generate a GraphQL schema. Jan 24, 2023 · This complete guide will help you learn more about GraphQL and how to use it with Python. The schema can be defined using GraphQL Schema Definition Language. The schema determines what resources the clients can query and update. Aug 24, 2021 · In this post and video we’ll show off some of the highlights of using Insomnia as a GraphQL client. Follow our step-by-step guide to define schemas, resolvers, and queries/mutations. We have already seen several examples of basic queries in this guide, and on this page, you’ll learn in detail how to use the various features of query operations to read data from a server. You will also build a GraphQL schema based on the GraphQL t… Dec 26, 2024 · Conclusion This guide explores building GraphQL APIs using . @graphql-codegen/cli is one such tool that can read in a GraphQL schema, compare it against the queries we're asking our frontend code to run, and generate all of the types that we'll need to use on the frontend. But we can't forget about our codebase changes, our GraphQL subgraph server! These include the changes we made to the resolver functions to make our schema work and the schema file itself. We need to deploy our local changes to production. Strawberry is built Hey all, in this GraphQL tutorial, I'll explain exactly what a GraphQL schema ias and we we need to create one. js and GraphQL Schema Definition Language in this comprehensive tutorial. We've created a public version of it since we think it's useful to anyone creating a GraphQL API. NET 8. By Jan 30, 2019 · We then use the graphql-tools to create a schema from the resolvers and the type definition. Add the GraphQL Schema This tutorial uses a modified version of the GraphQL server you build as part of the Apollo full-stack tutorial. If you are already familiar with the basics of GraphQL, here’s a quick overview: The GraphQL schema is where your GraphQL types are defined. js & Express as well as best practices for defining the GraphQL schema. By default this goes into a file called schema. We'll implement a GraphQL API with Java and DGS. Learn how to setup a GraphQL server with Node. Thinking in Graphs It’s Graphs All the Way Down 1 With GraphQL, you model your business domain as a graph Graphs are powerful tools for modeling many real-world phenomena because they resemble our natural mental models and verbal descriptions of the underlying process. ️ Updating our schema To add a mutation, let's go to our schema in our server/src folder, in the schema. Jan 6, 2020 · In a world of APIs, GraphQL can be a good skill to learn in 2024 and these are the best tutorials and courses to learn GraphQL in 2024. Instead of writing GraphQL Schema Definition Language (SDL), we write Python code to describe the data provided by your Jun 24, 2025 · Master graphql api: schema-first development in TypeScript with practical examples, best practices, and real-world applications 🚀 Jan 14, 2025 · Learn how to build powerful GraphQL API from scratch with Apollo or Express. Mar 13, 2025 · Learn how to get started with GraphQL. Dive deep into GraphQL schemas, learning how to define, implement, and optimize them. In this section of the tutorial, you’ll write a simple GraphQL schema, and you’ll consume it directly, just for the learning process. It is the easiest to get started though it does not currently support some advanced scenarios. From its flexible query language to its efficient data retrieval, GraphQL empowers developers to build more responsive and tailored APIs. The frontend team can start working with mocked data as soon as the schema is defined, while the backend team develops the API based on that same schema. Still very useful for input types. Learn about GraphQL clients, like Relay and Apollo Client, and the features they provide, such as caching, schema validation and query/view colocation. resolvers. It was developed by Facebook in 2012 and publicly released in 2015. Build a GraphQL API using GraphQL. It is a GraphQL vs Rest war winner!. It provides a strongly‑typed schema to define relationships between data, making APIs more flexible and predictable. What is GraphQL? GraphQL is an open‑source query language for APIs and a server‑side runtime. Feb 23, 2021 · Apollo documentation - The Apollo platform docs. The schema that was generated for us was: Learn frontend & backend GraphQL concepts from basic to advanced in our GraphQL Tutorial Series in top frontend frameworks using Hasura Backend API. Create a representation of your data that feels familiar and natural (a graph). Jan 8, 2024 · Learn how to use the Domain Graph Service (DGS) Framework from Netflix to build a simple Spring Boot GraphQL service in Java. Furthermore, clients can introspect the server to ask for schema details. Let’s go ahead and create a new file called schema. Getting started with Strawberry This tutorial will help you: Obtain a basic understanding of GraphQL principles Define a GraphQL schema using Strawberry Run the Strawberry dev server that lets you execute queries against your schema This tutorial assumes that you are familiar with the command line and Python, and that you have a recent version of Python (3. What goes into a schema? The schema is our source of truth when working with a GraphQL service. Key features like efficient data retrieval, real-time updates, and backward compatibility are highlighted. This step-by-step guide covers essential concepts, queries, mutations, and includes practical examples for beginners. The word schema in this tutorial refers to a "GraphQL Schema", which is not related to other schemas like "JSON Schema" or "Database Schema". Mar 10, 2025 · What you'll learn How to use the parent and args parameters in resolver functions Use arguments in the schema Use resolver chains to resolve data Send queries including query variables using Apollo Client 3 Jan 29, 2021 · Use GraphQL Modules to break your GraphQL application into simple, reusable, feature-based modules and maintain easily scalable code. resolvers. With the right set of tools and proper guidance, GraphQL can be an interactive powerhouse addition to your developer toolkit, building much more responsive and user-friendly applications in less time. If you want to learn more about GraphQL Playground, click here. Examine a mockup design and create a GraphQL schema from it Create our first object type Learn how to document a GraphQL schema with the [GraphQLDescription] attribute These packages are responsible for all of the GraphQL wiring we'll need to get our project up and running. It was … Mar 20, 2025 · Learn about the GraphQL schema, arguments, queries, and mutations. In this article, we will learn about GraphQL Schemas, and we will create some This GraphQL cheatsheet provides a concise reference to key GraphQL concepts, including queries, mutations, schemas, resolvers, and advanced topics like subscriptions, authentication, and performance optimization. After that, we create an Express server and set the middlewares for the two endpoints, /graphql and /rest. In this way, the schema is like a contract between the server and the client. It walks through creating a schema, defining resolvers, and implementing services to fetch employee data. At its heart, a schema is a collection of object types that contain fields. js Extend, customize, or introspect GraphQL systems Learn best practices for using GraphQL. The schema is as follows: With a REST API, the typical design is to provide an endpoint with a list of series and another with a list of characters in the series. You can visit that server's Apollo Studio Sandbox Explorer to explore its schema without needing to be logged in: GraphQL is an open source server-side technology which was developed by Facebook to optimize RESTful API calls. Step-by-step hands-on introduction for developers. This is the syntax that lets us actually define object types and their fields in a way that the GraphQL server can understand. Get ready to roll up your sleeves, write some code, test your understanding, and build something cool! Tutorial Copy page Mastering Local Development for GraphQL Federation From Zero to Federation in 5 Steps using Cosmo In the schema-first approach, we write the GraphQL schema in SDL (schema definition language). It also showcases examples of how to use these tools in a real-world application. Jan 22, 2024 · GraphQL is a powerful open-source Query Language for APIs. Strawberry uses a code-first approach to implementing a GraphQL server but it's still helpful to keep the schema-first design principles in mind; thinking about what types and fields our resolver functions will be defining based on the mockup designs and data that the app developers expect. What is Graphene? Graphene is a library that provides tools to implement a GraphQL API in Python using a code-first approach. Fields At its simplest, GraphQL is about asking for specific GraphQL for . On this page, we’ll explore GraphQL’s six kinds of named type definitions as well as other features of the type system to learn how they may be used to describe your data and the relationships between them. For example, GraphQL enables you to: Aggregate data from multiple UI components. Mar 20, 2025 · What you'll learn Learn the basics of GraphQL Build and run queries with Apollo Sandbox Create an ApolloClient instance connected to the remote server Send queries to a GraphQL server using Apollo Kotlin 4 Reflect queried data in the app using Jetpack Compose Learn about enum types A closer look at how Connectors work in the GraphQL schema, and the directives that bring it all to life. We'll also start to flesh out an object type The GraphQL schema makes up the comprehensive picture of everything we can do with the data in a GraphQL service. Follow this hands-on tutorial for a comprehensive guide. A GraphQL schema defines what kind of object can be fetched from a service, and what fields it has. Integrate graphql with HTTP Oct 6, 2021 · The schema-first approach means that you write your schema manually using the GraphQL schema definition language. We'll start with the type keyword, then Mutation, followed by curly braces. The schema for the above query is: Learn about Apollo's recommended schema design strategy as well as many practical tips for creating expressive and evolvable GraphQL schemas. . Nov 15, 2023 · GraphQL is a query language that offers an alternative model to developing APIs (REST, SOAP or gRPC) with detailed description. Whether you’re a seasoned developer or a beginner, this guide will walk you through the process of designing and implementing a GraphQL schema. Originally contributed by Robert Matyszewski on Invalid Date. NET C# and Hot Chocolate. We'll implement a GraphQL API with TypeScript and Apollo Server. This tutorial uses the CLI command stepzen import postgresql to introspect a backend PostgreSQL database and generate a GraphQL schema. The schema is generated automatically behind the scenes. Getting Started Why should I use GraphQL? It depends on your use case, but in general, GraphQL has a few key features that stand out. Your GraphQL server uses a schema to describe the shape of your available data. There are several repositories in the GraphQL Java Github org. Writing Code To handle GraphQL queries, we need a schema that defines the Query type, and we need an API root with a function called a “resolver” for each API endpoint. It defines: The types of data available The relationships between those types The operations clients can perform (queries, mutations, subscriptions) The structure of requests and Jul 11, 2024 · schema. SDL is a language-agnostic way to share schema files between different platforms. Use the optional GraphQLMetadata attribute to customize the mapping to the schema type. It is an execution engine and a data query language. Apr 14, 2025 · In the schema first approach, the source of truth is GraphQL SDL (Schema Definition Language) files. This is a human-readable schema syntax called Schema Definition Language (SDL). We’ll build a GraphQL server on which we'll fetch data. graphql in our root directory. generated. Queries Learn how to fetch data from a GraphQL server GraphQL supports three main operation types—queries, mutations, and subscriptions. Learn 📝 How to GraphQL - Free and open-source tutorials to learn all around GraphQL to go from zero to production. If you learn best by doing, check out the intro tutorial to GraphQL with TypeScript & Apollo Server. js file. js, Express, Apollo Server, React, Apollo Client. Learning Outcomes: By the end of this tutorial, you’ll be able to: – Implement advanced GraphQL schema design techniques such as union types, interfaces, and pagination. We recommend collaborating with your graph consumers on naming decisions. Throughout this course, we're going to learn how GraphQL fits into our existing architecture and how it works with existing REST APIs and other data sources. In both annotation-based and code-first approaches, we only write resolvers. graphql Adding a new query In the current database I have 3 tables: Series, Character, and a relation table Series_Character. Apollo makes it simple to use GraphQL, the flexible new query language taking APIs by storm. It's based on lessons learned from creating and evolving production schemas at Shopify over almost 3 years. Mar 31, 2025 · AEM Headless GraphQL Hands-on Tutorial Explore AEM’s GraphQL capabilities by building out a React App that consumes Content Fragments via AEM’s GraphQL APIs. Implement a simple Hello World example using Strawberrydescription: sets the GraphQL type description to help API consumers make sense of what the type is or how it should be used. DGS automatically scours our project for schema files (specifically, by looking in the project's src/main/resources/schema folder, which we are about to create), along with certain annotations and functions that we'll define shortly. It's a collection of types and fields, along with the specific menu of operations we can use to interact with the data. go will call into this to get the data the user has requested. Learn how to setup a GraphQL server with graphql-java and best practices for defining the GraphQL schema in this tutorial. The syntax is well-defined and will be adopted in the official GraphQL Specification. Learn how to create a basic GraphQL server with Apollo Server using TypeScript or JavaScript. In there, we're going to create a new file called schema. The Power of GraphQL Schemas A well-designed GraphQL schema serves as the blueprint for your entire API. Jan 31, 2025 · Conclusion Kotlin and GraphQL: A Step-by-Step Tutorial is a comprehensive guide to building scalable and maintainable APIs using Kotlin and GraphQL. This side quest introduces some new GraphQL concepts that you can use to design more complex schemas. We'll learn how to use queries, mutations, arguments, the schema, and resolvers in our GraphQL API. You can use this to implement a GraphQL service with resolvers backed by whatever C++ libraries you need. This tutorial covers schema definition, data management, and executing queries. Schemas in GraphQL are the blueprints for its APIs and define what the request-response structure would look like. Apollo Docs Learn to design, build, and orchestrate APIs with GraphQL at any scale Apollo is the developer platform for graph-based API orchestration. NETSchema First Approach The Schema first approach relies upon the GraphQL schema language, coding conventions, and tries to provide a minimal amount of syntax. It’s more complex than simply merging schemas together, though, because it needs to handle relationships, detect incompatibilities, and ensure types are properly connected across The Supergraph schema is used by the router like a map, to define how incoming GraphQL operations can be divided up among the underlying subgraphs. This doesn’t mean that there aren’t solutions for these issues when using GraphQL, just that they’re outside the description about what GraphQL is and instead just common practice. And in order to send queries to a service, we need its schema to include a very special type: the Query type. The source code for the examples in this tutorial is stored in the Examples repository. By default, Strawberry will generate the name by converting the name of the class to PascalCase (a GraphQL common convention). js: So far, we've only been talking about schema changes and how they should be published to GraphOS. graphqls — This is the file where you will add GraphQL schemas. graphql schema. May 6, 2024 · Master GraphQL in Java with this ultimate guide. These clients can be web, mobile This tutorial uses the CLI command stepzen import db2 to introspect a backend Db2 database and generate a GraphQL schema. We are going to use Flask to create a server that expose the GraphQL schema under /graphql and a interface for querying it easily: GraphiQL (also under /graphql when accessed by a browser). You will also learn how to use GraphQL with Python and Django. Mar 1, 2025 · This tutorial delves into advanced techniques to master these complexities, ensuring your GraphQL API is optimized and maintainable. Key Features Client-specified queries: Request exactly what you need, nothing more Single endpoint: Access all resources through one endpoint Strongly typed: Clear schema defines available data and operations Jul 23, 2025 · Conclusion In this comprehensive GraphQL tutorial, you have explored the world of GraphQL, exploring its unique features, benefits, and practical applications. 10+) installed. Configure our Gradle build with the URL to the GraphQL schema Use the Apollo GraphQL Android Studio plugin or the command line to download the schema Oct 23, 2024 · A Beginner’s Guide to GraphQL: Understanding the Basics with an Example GraphQL is a powerful query language for APIs, allowing clients to request only the data they need from a server. Apr 22, 2025 · Move beyond REST! Learn how to implement GraphQL Federation in Spring Boot with Apollo Gateway for scalable, type-safe microservices Apr 29, 2025 · Learn GraphQL and Golang integration with this beginner-friendly tutorial, covering setup, queries, mutations, and more in a step-by-step guide The GraphQL schema is a collection of types and fields that make up the comprehensive picture of everything we can do with the data in a GraphQL server. Dec 14, 2024 · Learn how to build scalable APIs with Node. Additionally, our GraphQL tutorials are enriched with code challenges, tasks, and quick quizzes to make the experience interactive and reinforce your knowledge. Jan 8, 2024 · Interface Definition Language (IDL) or Schema Definition Language (SDL) is the most concise way to specify a GraphQL Schema. graphql GraphQL Schema Definition Language (SDL) file, using the GraphQL directive @dbquery to connect to the Db2 database. Tip: You can alternatively write your schema in a . The articles in this Apollo Connectors provide a declarative, configuration-first approach for simplifying API orchestration. So go ahead, experiment with GraphQL, create expressive schemas, and embrace the power of introspection. Jan 4, 2019 · You see the GraphQL Playground, a powerful GraphQL IDE for better development workflows. So go ahead, experiment with GraphQL, create expressive schemas, and embrace the power of To get started with our schema, we'll need a couple packages first: @apollo/server, graphql and graphql-tag. Oct 16, 2022 · Complete golang graphql tutorial with sample schema and resolving the content with schema. Feb 17, 2025 · Conclusion Mastering GraphQL Schema Design: A Hands-On Approach to Creating Flexible APIs is a comprehensive tutorial that guides you through the process of designing and implementing a GraphQL schema that meets the needs of your application. We've barely scratched the surface of what's possible with GraphQL. For this particular feature, we want the GraphQL schema to include a featuredPlaylists field under the Query type, which is a list of Playlist objects. Jun 13, 2022 · In this tutorial, you’ll make an Express API server in Node. We only have one at the moment, so all fields in an operation will be routed over to the listings subgraph. While there are benefits and drawbacks to each approach, Apollo GraphQL recommends (via their Principled GraphQL guide) to make use of the schema-first approach. GraphQL Editor lets you create backends and mocks out of graphql schemas. js in production Whether you’re writing your own server, building a GraphQL clients, or creating tools that work with GraphQL, this site guides you through core concepts, APIs, and advanced use cases of GraphQL. If you're already familiar with SDL, feel free to move to the next lesson. Schema composition is the process where multiple subgraph schemas are combined into one unified schema. We'll also see examples of how to use each concept in a real-world application. Jul 28, 2025 · Learn about the GraphQL schema, arguments, queries, and mutations. When clients make requests, the graph automatically orchestrates API calls to return exactly the requested data. graphql. Create types, queries, mutations, and resolvers automatically. Now that we have our Module type, let's go back to our Track type. Learn about the basic GraphQL language concepts, such as Queries, Mutations, Subscriptions and the GraphQL Schema & SDL. Jul 11, 2024 · If you're new to GraphQL Schema, check out our GraphQL Schema Tutorial to get up to speed with the basics. It is designed to help developers quickly understand and apply GraphQL's flexible quer Jan 17, 2019 · Read a GraphQL Editor blogpost titled : 'GraphQL Tutorial - Schemas and Types Part 1'. go — This is where your application code lives. The most important one is the Before we jump into defining our schema, let's run through a quick crash course on GraphQL's Schema Definition Language, or SDL. Then, we need to write resolver functions to populate each field in the schema. May 11, 2021 · GraphQL has its own language (GraphQL Schema Definition Language) that is used to write the schema. Learn how to set up, query, and manage data using GraphQL, Java, and Hasura for efficient development. Jul 1, 2024 · This article will transform your understanding of GraphQL. We know that a Track can have multiple modules, so let's add a field to Track called modules, which returns an array of Module objects. Shopify GraphQL Design Tutorial This tutorial was originally created by Shopify for internal purposes. Creating GraphQL and GraphiQL views in Flask Unlike a RESTful API, there is only a single URL from which GraphQL is accessed. We'll implement a GraphQL API using . 0 with a code-first approach. Compare Graphene’s code-first approach to building a GraphQL API with schema-first approaches like Apollo Server (JavaScript) or Ariadne (Python). Jul 23, 2025 · From its flexible query language to its efficient data retrieval, GraphQL empowers developers to build more responsive and tailored APIs. You can visit that server's Apollo Studio Sandbox Explorer to explore its schema without needing to be logged in: Jul 29, 2025 · This is a comprehensive GraphQL tutorial, where we will embark on a journey to demystify the concepts of GraphQL and guide you through the process of getting started with Spring for GraphQL. Mar 20, 2025 · Intro to GraphQL with Python and Strawberry Learn about the GraphQL schema, arguments, queries, and mutations. It is most commonly known for its single endpoint query which allows the user to define a single endpoint to fetch all the information needed. Jul 23, 2025 · Consider best practices in things like schema design, query optimization, and security as you start diving into GraphQL. An easy way to do this, and to keep our frontend's type definitions consistent with the backend, is to use a GraphQL Code Generator. Jul 29, 2025 · This is a comprehensive GraphQL tutorial, where we will embark on a journey to demystify the concepts of GraphQL and guide you through the process of getting started with Spring for GraphQL. For an API that just returns “Hello world!”, we can put this code in a file named server. Perfect for building GraphQL APIs from existing JSON structures. Getting Started with GraphQL To get a better understanding of how GraphQL works, you can start by reading this tutorial about GraphQL basics. Often you will override these with your own models. name: sets the name of the type in the GraphQL schema. Jul 29, 2025 · Apollo GraphQL Tutorial for Beginners This Apollo GraphQL crash course will guide you through the fundamentals. See Connecting a Db2 database for an example. This tutorial will introduce you to the fundamental concepts of GraphQL including ? Schema Design Design and evolve a type system over time without versions Versioning While there’s nothing that prevents a GraphQL service from being versioned just like any other API, GraphQL takes a strong opinion on avoiding versioning by providing the tools for the continuous evolution of a GraphQL schema. Mar 20, 2025 · Learn about the GraphQL schema, arguments, queries, and mutations. With GraphQL, you model your business domain as a graph by defining a schema; within your schema, you define different types Dec 16, 2024 · The GraphQL Boot starter works by processing GraphQL Schema files to build the correct structure and then wires special beans to this structure. A list field can only contain object types. The GraphQL schema is a collection of types and fields that make up the comprehensive picture of everything we can do with the data in a GraphQL server. A C++20 GraphQL service generator using the schema document. Schema composition Let’s break down schema composition in GraphQL federation with more detail and examples. Dec 5, 2022 · We'll learn four new tools for designing GraphQL schemas: enums, input types, interfaces, and query fragments. Schema GraphQL has its own type of language that’s used to write schemas. With Apollo Connectors, we define requests to our data sources and map the responses to our schema. Dec 6, 2024 · Learn GraphQL fundamentals and build scalable APIs with Node. This tutorial uses a modified version of the GraphQL server you build as part of the Apollo full-stack tutorial. js. By following this tutorial, you will learn how to define a GraphQL schema, implement resolvers, and create a server-side implementation using Spring Boot. Building the schema Let's navigate to the src directory. Jun 11, 2025 · What you'll learn The architecture of a supergraph (subgraphs and the router) and Apollo Federation 2 Create a supergraph with a self-hosted router in GraphOS Create entities Explore GraphOS graph insights and schema delivery Use the @external and @requires GraphQL schema directives Use the Rover CLI to publish subgraphs, run schema checks and facilitate local development The types in our schema must correspond exactly to objects returned by our REST API. extensions. Our tools help you model your APIs as GraphQL schemas, then compose them into a scalable graph. This isn't the only way to design a GraphQL API, but we believe it's an efficient one, so we'll use it throughout this course. Today, we'll explore the key pieces of GraphQL and show you how to implement each in your own schemas. Jan 17, 2024 · Learn the core concepts of GraphQL and running an example Spring Boot application with GraphQL integrated for querying and updating the data.