GORM에 내장된 구조체를 단일 엔터티로 저장하는 방법은 무엇입니까?

<code class="go">type A struct {
    point GeoPoint
}

type GeoPoint struct {
    Lat float64
    Lon float64
}</code>

<code class="go">import (
    "encoding/json"

    "gorm.io/gorm"
)

// Define custom Scan and Value methods for ChildArray to enable automatic marshalling and unmarshalling.
type ChildArray []Child

func (sla *ChildArray) Scan(src interface{}) error {
    return json.Unmarshal(src.([]byte), &sla)
}

func (sla ChildArray) Value() (driver.Value, error) {
    val, err := json.Marshal(sla)
    return string(val), err
}

// Define the parent struct with the embedded ChildArray.
type Parent struct {
    *gorm.Model
    Childrens ChildArray `gorm:"column:childrens;type:longtext"`
}</code>