Выгрузить картинки из базы

 
                        Table "public.photo"
  Column  |     Type      |                Modifiers
----------+---------------+------------------------------------------
 id       | integer       | not null default nextval('id'::regclass)
 filename | character(64) |
 author   | character(64) |
 pic      | bytea         |
Indexes:
    "foto_pkey" PRIMARY KEY, btree (id)

type Image struct {
	// Your hight-level abstraction over raw 
	// binary data fetched from db
	data []byte
}

type ImageDB struct {
	data []byte
}

func (i *ImageDB) Scan(src interface{}) error {
	// huy ego znaet, how postgres would send
	// image data in golang representation, it might be []byte I guess
	switch src.(type) {
	case string:
		i.data = []byte(src.(string))
	case []byte:
		i.data = src.([]byte)
	default:
		return errors.New("Can't scan data from db")
	}

	return nil
}

func (i *ImageDB) Value() (driver.Value, error) {
	return Image{i.data},nil
}

type Photo struct {
	ID int64
	Filename, Author string
	Pic ImageDB
}

type PhotoRepository interface {
	GetAll() ([]Photo, error)
}

func photoRepository struct {
	db *gorm.DB
}

func (r *photoRepository) GetAll() ([]Photo, error) {
	var all []Photo

	return all, db.New().Table("photo").Find(&all).Error
}