type Rule struct {
	ID int64 `json:"id"`
	Rule []*option.Rule `json:"rule"`
}

type Res1 struct {
	g.Meta
	Rule
}

var err error
var r = &Rule{
	ID: 100,
}
var res = &Res1{}
if err = gconv.Scan(r, res); err != nil {
	fmt.Println("err=", err)
	return
}
for {
	if res.ID == 0 {
		fmt.Println("res.id")
		g.Dump(res)
		fmt.Printf("%+v\n", res)
		time.Sleep(time.Second)
	}
}

res.id
{
    ID:   0,
    Rule: {
        ID:   0,
        Rule: [],
    },
}
&{Meta:{} Rule:{ID:0 Rule:[]}}