make item image field optional

main.go

@@ -20,7 +20,7 @@ type Item struct {
 	URL         string    `json:"url" db:"url"`
 	Title       string    `json:"title" db:"title"`
 	Description string    `json:"description" db:"description"`
-	ImageURL    string    `json:"imageUrl" db:"image_url"`
+	Image       *string   `json:"image" db:"image"`
 	CreatedAt   time.Time `json:"createdAt" db:"created_at"`
 	UpdatedAt   time.Time `json:"updatedAt" db:"updated_at"`
 }
@@ -28,7 +28,7 @@ type Item struct {
 type ArticleMetadata struct {
 	Title       string
 	Description string
-	ImageURL    string
+	Image       *string
 }
 
 func getArticleMetadata(url string) (*ArticleMetadata, error) {
@@ -56,12 +56,12 @@ func getArticleMetadata(url string) (*ArticleMetadata, error) {
 
 	description := doc.Find(`head>meta[name="og:description"]`).AttrOr("content", "")
 
-	imageUrl := doc.Find(`head>meta[name="og:image"]`).AttrOr("content", "")
-	if imageUrl == "" {
+	image := doc.Find(`head>meta[name="og:image"]`).AttrOr("content", "")
+	if image == "" {
 		doc.Find("img").Each(func(i int, s *goquery.Selection) {
 			src := s.AttrOr("src", "")
 			if src != "" {
-				imageUrl = src
+				image = src
 				return
 			}
 		})
@@ -70,7 +70,7 @@ func getArticleMetadata(url string) (*ArticleMetadata, error) {
 	return &ArticleMetadata{
 		Title:       title,
 		Description: description,
-		ImageURL:    imageUrl,
+		Image:       &image,
 	}, nil
 }
 
@@ -97,7 +97,7 @@ CREATE TABLE IF NOT EXISTS items (
 	url varchar not null unique,
 	title varchar not null,
 	description varchar,
-	image_url varchar not null,
+	image varchar default null,
 	created_at datetime default current_timestamp,
 	updated_at datetime default current_timestamp
 );
@@ -133,11 +133,11 @@ END;
 			return
 		}
 
-		if _, err := db.NamedExec("INSERT INTO items (url, title, description, image_url) VALUES (:url, :title, :description, :image_url)", map[string]any{
+		if _, err := db.NamedExec("INSERT INTO items (url, title, description, image) VALUES (:url, :title, :description, :image)", map[string]any{
 			"url":         pageUrl,
 			"title":       meta.Title,
 			"description": meta.Description,
-			"image_url":   meta.ImageURL,
+			"image":       meta.Image,
 		}); err != nil {
 			http.Error(w, fmt.Sprintf("failed to add item to db: %v", err), 500)
 			return