by Robin at 20240911;

app/mix/service/utilservice.go

@@ -1688,6 +1688,33 @@ func (s *Service) utilGetZonePreviews(ctx *gin.Context, zid int64) (previews *db
 		}
 	}
 
+	if len(imageIds) == 0 {
+		vzmlist := make([]*dbstruct.ZoneMoment, 0)
+		vzmlist, err = _DefaultZoneMoment.OpListByZid(ctx, &zonemomentproto.OpListByZidReq{
+			Zid:    goproto.Int64(zid),
+			MType:  goproto.Int64(consts.MediaTypeVideo),
+			CType:  goproto.Int64(consts.ZoneMomentCType_Free),
+			Status: goproto.Int64(consts.ZoneMoment_Public),
+			Limit:  4,
+		})
+		if err != nil {
+			logger.Error("_DefaultZoneMoment OpListByZid fail, req: %v, err: %v", err)
+			return
+		}
+
+		objectMediaNum := 1 // 单个空间服务总共5个媒体类
+		mediaFillableList := make([]mediafiller.MediaFillable, len(vzmlist)*objectMediaNum)
+		for i, vo := range vzmlist {
+			mediaFillableList[objectMediaNum*i+0] = vo.MediaComp
+		}
+
+		imageIds, err = mediafiller.GetCoverIds(ctx, mediaFillableList)
+		if err != nil {
+			logger.Error("GetCoverIds fail, req: %v, err: %v", err)
+			return
+		}
+	}
+
 	previews = &dbstruct.MediaComponent{
 		ImageIds: util.Int64Slice(imageIds),
 	}

library/mediafiller/mediafiller.go

@@ -221,3 +221,22 @@ func FillListInternal(ctx *gin.Context, list []MediaFillable) error {
 
 	return nil
 }
+
+func GetCoverIds(ctx *gin.Context, list []MediaFillable) ([]int64, error) {
+	coverIds := make([]int64, 0)
+	videoIds := make([]int64, 0)
+	for _, v := range list {
+		videoIds = append(videoIds, v.GetVideoIds()...)
+	}
+	videoMap, err := getVideoMapByIds(ctx, videoIds)
+	if err != nil {
+		logger.Error("mediafiller component getVideoMapByIds failed : %v", err)
+		return make([]int64, 0), err
+	}
+
+	// 获取视频封面
+	for _, v := range videoMap {
+		coverIds = append(coverIds, v.CoverId)
+	}
+	return coverIds, nil
+}