Magento 2 GraphQL Tutorial: Learn Custom Queries & Mutations | Mironsoft
Magento 2 GraphQL: The Complete Tutorial for Custom Queries, Mutations, and Performance
Learn GraphQL in Magento 2 from the ground up: schema architecture, writing custom queries and mutations, extending core types, authentication and error handling in resolvers, solving N+1 problems with batch resolvers, caching, file uploads, and ACL - demonstrated through a continuous events API project.
Das lernst du
- Why Magento offers GraphQL alongside REST and SOAP, and how schema.graphqls, resolvers, and DataProviders work together
- How to define a custom query in your own module with custom types, required fields, lists, and input types
- How to extend existing core types with extend type instead of duplicating them
- How to build a custom events API step by step: a schema with pagination, a DataProvider, filtering and sorting, and a single-item query by identifier
- How to build a protected mutation: checking the customer token and customer context, and correctly using GraphQlInputException and GraphQlAuthorizationException
- How to recognize and solve the N+1 problem with batch resolvers, cache GraphQL responses, and implement file uploads and ACL for custom endpoints
- How to test GraphQL queries and systematically debug the most common errors (schema cache, missing resolver registration, incorrect type declarations)
Voraussetzungen
- Solid PHP knowledge and a basic understanding of Magento 2 module structure is assumed - the standalone module skeleton is still briefly revisited in block 2 before moving on to schema.graphqls and resolvers themselves
Kapitel dieser Serie
- 1 What Is GraphQL? Why Magento Offers GraphQL Alongside REST and SOAP ~6 Min. Lesezeit
- 2 Magento GraphQL Architecture Overview: schema.graphqls, Resolvers, DataProviders ~7 Min. Lesezeit
- 3 Using the Built-In GraphQL Interface: Endpoint, First Queries With a GraphQL Client ~6 Min. Lesezeit
- 4 Prerequisites: Setting Up a Custom Module and a schema.graphqls Skeleton ~6 Min. Lesezeit
- 5 Defining a First Custom Query and Writing a Matching Resolver ~7 Min. Lesezeit
- 6 Scalar and Complex Types, Defining Custom Input Types ~8 Min. Lesezeit
- 7 Correctly Modeling Required Fields, Nullable Fields, and Lists in the Schema ~7 Min. Lesezeit
- 8 Extending Core Types: Using extend type Instead of Duplicating Types ~7 Min. Lesezeit
- 9 Adding Custom Fields to Product, Category, or Customer ~8 Min. Lesezeit
- 10 The ResolverInterface in Detail: Understanding Context, Field, Args, and Value ~8 Min. Lesezeit
- 11 Project Introduction: an Events GraphQL API, Module and Data Model ~9 Min. Lesezeit
- 12 Defining the Schema for Events: Type, Query, Pagination Following the Connection Pattern ~8 Min. Lesezeit
- 13 Implementing the DataProvider and Resolver for the Events List ~9 Min. Lesezeit
- 14 Offering Filtering and Sorting in the GraphQL Query ~8 Min. Lesezeit
- 15 Querying a Single Event by Identifier ~7 Min. Lesezeit
- 16 What Are Mutations? Writing a First Custom Mutation ~8 Min. Lesezeit
- 17 Understanding Authentication: Using the Customer Token, Checking the Customer Context in the Resolver ~8 Min. Lesezeit
- 18 Building a Protected Mutation: Marking an Event as a Favorite (Logged-In Customers Only) ~8 Min. Lesezeit
- 19 Error Handling: Correctly Using GraphQlInputException and GraphQlAuthorizationException ~8 Min. Lesezeit
- 20 Understanding the N+1 Problem and Solving It With Batch Resolvers ~9 Min. Lesezeit
- 21 Caching GraphQL Responses and the Full Page Cache ~8 Min. Lesezeit
- 22 File Uploads Over GraphQL ~8 Min. Lesezeit
- 23 ACL and Permissions for Custom GraphQL Endpoints ~8 Min. Lesezeit
- 24 Testing GraphQL Queries: Tools and Automated Tests ~8 Min. Lesezeit
- 25 Common Errors and How to Debug Them (Schema Cache, Missing Resolver Registration, Incorrect Type Declarations) ~9 Min. Lesezeit
- 26 Summary: A Cheat Sheet of Every Important GraphQL Pattern From This Series ~7 Min. Lesezeit