Hello World

main.go

package main
import (    "encoding/json"    "fmt"    "log"
    "github.com/graphql-go/graphql")
func main() {    // Schema    fields := graphql.Fields{        "hello": &graphql.Field{            Type: graphql.String,            Resolve: func(p graphql.ResolveParams) (interface{}, error) {                return "world", nil            },        },    }    rootQuery := graphql.ObjectConfig{Name: "RootQuery", Fields: fields}    schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}    schema, err := graphql.NewSchema(schemaConfig)    if err != nil {        log.Fatalf("failed to create new schema, error: %v", err)    }
    // Query    query := `        {            hello        }    `    params := graphql.Params{Schema: schema, RequestString: query}    r := graphql.Do(params)    if len(r.Errors) > 0 {        log.Fatalf("failed to execute graphql operation, errors: %+v", r.Errors)    }    rJSON, _ := json.Marshal(r)    fmt.Printf("%s \n", rJSON) // {“data”:{“hello”:”world”}}}