GraphQL mutations allow clients to modify server-side data by creating, updating, or deleting records. Unlike queries, which only read data, mutations enable write operations while still allowing you to specify what data you want returned.
What Are Mutations
• Mutations are operations that change data (CRUD: Create, Read, Update, Delete).
• Use the mutation keyword to define them.
• Mutations return data similarly to queries, letting clients receive confirmation or updated data after the operation.
Basic Mutation Syntax Example of creating a user:
mutation { createUser(name: “Alice”, email: “alice@example.com”) { id name email } }
Passing Arguments in Mutations Mutations can accept arguments like strings, numbers, or IDs: mutation { updateUser(id: 1, email: “newemail@example.com”) { id name email } }
Using Variables with Mutations Variables help make mutations reusable and dynamic: mutation updateUser($id: ID!, $email: String!) { updateUser(id: $id, email: $email) { id name email } } user passes variables: { “id”: 1, “email”: “updated@example.com” }