Merge pull request 'fix-2046' (#2053) from V20220428.patch into V20220519

Reviewed-on: https://git.openi.org.cn/OpenI/aiforge/pulls/2053
Reviewed-by: lewis <747342561@qq.com>

models/cloudbrain_image.go

@@ -45,7 +45,7 @@ type ImageStar struct {
 }
 
 type ImageTopic struct {
-	ID          int64
+	ID          int64  `xorm:"pk autoincr"`
 	Name        string `xorm:"UNIQUE VARCHAR(105)"`
 	ImageCount  int
 	CreatedUnix timeutil.TimeStamp `xorm:"INDEX created"`
@@ -468,8 +468,13 @@ func (images ImageList) loadAttributes(e Engine, uid int64) error {
 	}
 
 	for i := range images {
-		images[i].UserName = users[images[i].UID].Name
-		images[i].RelAvatarLink = users[images[i].UID].RelAvatarLink()
+		if users[images[i].UID] != nil {
+			images[i].UserName = users[images[i].UID].Name
+			images[i].RelAvatarLink = users[images[i].UID].RelAvatarLink()
+		} else {
+			images[i].UserName = ""
+			images[i].RelAvatarLink = ""
+		}
 		if uid == -1 {
 			images[i].IsStar = false
 		} else {