enum_test.go

package main

import (
	"encoding/json"
	"fmt"
	"log"

	"github.com/graphql-go/graphql"
)

var orderByChoices = graphql.EnumValueConfigMap{
	"EffectiveDateMax": &graphql.EnumValueConfig{Value: "EffectiveDateMax"},
	"EffectiveDateMin": &graphql.EnumValueConfig{Value: "EffectiveDateMin"},
}

var orderByChoicesEnum = graphql.NewEnum(graphql.EnumConfig{
	Name:   "OrderBy",
	Values: orderByChoices,
})

var EnumQuery = graphql.NewObject(graphql.ObjectConfig{
	Name: "RootQuery",
	Fields: graphql.Fields{
		"echo": &graphql.Field{
			Type: graphql.String,
			Args: graphql.FieldConfigArgument{
				"order_by": &graphql.ArgumentConfig{
					Type: graphql.NewList(orderByChoicesEnum),
				},
			},
			Resolve: func(params graphql.ResolveParams) (interface{}, error) {
				fmt.Printf("%T %#v\n", params.Args["order_by"], params.Args["order_by"])

				return "true", nil
			},
		},
	},
})

var queryTest = `
{
	echo(order_by: [EffectiveDateMax])
}
`

func main() {
	schema, err := graphql.NewSchema(graphql.SchemaConfig{
		Query: EnumQuery,
	})
	if err != nil {
		log.Fatalf("failed to create schema: %s", err)
	}

	result := graphql.Do(graphql.Params{
		Schema:        schema,
		RequestString: queryTest,
	})

	jsonStr, err := json.MarshalIndent(result, "", "  ")
	if err != nil {
		log.Fatalf("fail to jsonify result: %s", err)
	}

	fmt.Println(string(jsonStr))
}