scan 对于继承的struct不生效 about gendry HOT 1 OPEN

type JobDetail struct {
  Job
}

//等价于

type JobDetail struct {
  Job Job
}

type ByteUnmarshaler interface {
	UnmarshalByte(data []byte) error
}

type human struct {
	Age   int       `ddb:"ag"`
	Extra *extraInfo `ddb:"ext"`
}

type extraInfo struct {
	Hobbies     []string `json:"hobbies"`
	LuckyNumber int      `json:"ln"`
}

func (ext *extraInfo) UnmarshalByte(data []byte) error {
	return json.Unmarshal(data, ext)
}

//if the type of ext column in a table is varchar(stored legal json string) or json(mysql5.7)
var student human
err := scanner.Scan(rows, &student)
// ...