Quick Start

The following is a simple example which defines a schema with a single hello string-type field and a Resolve method which returns the string world. A GraphQL query is performed against this schema with the resulting output printed in JSON format.

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"}}    }