entity

type Article struct {
	ID          int64
	UserId      int64  `datastore:"user_id"`
	Title       string `datastore:"title"`
	Number      int64
	Message     string
	Category    string
	Url         string
	MdGcsPath   string
	Attachments []*Attachment
	MDBody      string `datastore:",noindex"`
	CreatedAt   time.Time
	UpdatedAt   time.Time
}

type ArticleRepository interface {
	Get(id int64) (*Article, error)
	Put(*Article) (int64, error)
	Delete(id int64) error
}

type Attachment struct {
	ID        string
	Name      string
	Content   []byte
	OriginURL string
	URL       string
}