Go and GraphQL - Main

main.go

package main

import (
	"github.com/graphql-go/graphql-go-handler"
	"github.com/graphql-go/graphql"
	"net/http"
)

var queryType = graphql.NewObject(graphql.ObjectConfig{
	Name: "Query",
	Fields: graphql.Fields{
		"fieldName": &graphql.Field{
			Type: graphql.String,
			Resolve: func(p graphql.ResolveParams) (interface{}, error) {
				return "Hi there!", nil
			},
		},
	},
})

var Schema, _ = graphql.NewSchema(graphql.SchemaConfig{
	Query: queryType,
})

func main() {

	h := handler.New(&handler.Config{
		Schema:   &Schema,
		Pretty:   true,
		GraphiQL: true,
	})

	// serve a GraphQL endpoint at `/`
	http.Handle("/", h)

	// Serve it at localhost:8080
	http.ListenAndServe(":8080", nil)
}