generated.go

type Op int

const (
	OpNull   Op = 0
	OpCreate Op = 1
	OpModify Op = 2
	OpDelete Op = 3
)

var OpName = map[int]string{
	0: "NULL",
	1: "CREATE",
	2: "MODIFY",
	3: "DELETE",
}

var OpValue = map[string]int{
	"NULL":   0,
	"CREATE": 1,
	"MODIFY": 2,
	"DELETE": 3,
}

func (e Op) IsValid() bool {
	switch e {
	case OpNull, OpCreate, OpModify, OpDelete:
		return true
	}
	return false
}

func (e Op) String() string {
	return OpName[int(e)]
}

func (e *Op) UnmarshalGQL(v interface{}) error {
	value, ok := v.(int)
	if !ok {
		return fmt.Errorf("enums must be integers")
	}
	*e = Op(value)
	if !e.IsValid() {
		return fmt.Errorf("%v is not a valid Op", value)
	}
	return nil
}

func (e Op) MarshalGQL(w io.Writer) {
	fmt.Fprint(w, e)
}

schema.graphql

directive @intEnum on ENUM

enum Op @intEnum {
  NULL
	CREATE
	MODIFY
	DELETE
}