如何在 GORM 中將一個結構嵌入到另一個結構中並將其作為欄位儲存在主表中？

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

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

<code class="go">func (gp *GeoPoint) Scan(src interface{}) error {

    // Convert the `src` value to a byte array.
    b, ok := src.([]byte)
    if !ok {
        return fmt.Errorf("could not convert to byte array")
    }

    // Unmarshal the byte array into the `GeoPoint` struct.
    if err := json.Unmarshal(b, gp); err != nil {
        return fmt.Errorf("could not unmarshal JSON: %v", err)
    }

    return nil
}

func (gp GeoPoint) Value() (driver.Value, error) {

    // Marshal the `GeoPoint` struct into a byte array.
    b, err := json.Marshal(gp)
    if err != nil {
        return nil, fmt.Errorf("could not marshal JSON: %v", err)
    }

    return string(b), nil
}</code>

<code class="go">type A struct {
    gorm.Model
    Point *GeoPoint `gorm:"column:point;type:json"`
}</code>