How to Handle GraphQL Queries, Mutations, and Subscriptions in Go

Go does not have built-in support for GraphQL queries, mutations, or subscriptions; you must use a third-party library like gqlgen or graphql-go to implement them. Install a library and define your schema to handle these operations:

go install github.com/99designs/gqlgen@latest
gqlgen init

Define your schema in schema.graphql:

type Query {
  hello: String
}

type Mutation {
  setHello(name: String!): String
}

type Subscription {
  helloChanged: String
}

Generate the server code and run it:

gqlgen generate
go run main.go

Go is a general-purpose language that doesn't include a specific tool for GraphQL out of the box. You need to add an external library to your project to create the rules (schema) and logic for handling data requests, changes, and real-time updates. Think of it like buying a specialized engine for a car; the car (Go) is ready, but you need to install the engine (library) to drive it in that specific way.