bugfix

internal/mysqldao/like.go

@@ -86,6 +86,34 @@ func (d *LikeDao) LikeCountByTarget(ctx context.Context, likeType int8, targetID
 	return count, nil
 }
 
+// LikeCountByTargets 批量统计多个目标的点赞数（仅 status=1），返回 targetID -> count；空入参短路。
+func (d *LikeDao) LikeCountByTargets(ctx context.Context, likeType int8, targetIDs []int64) (map[int64]int64, error) {
+	ctx, span := global.Tracer.Start(ctx, "mysqldao.LikeCountByTargets")
+	defer span.End()
+
+	counts := make(map[int64]int64, len(targetIDs))
+	if len(targetIDs) == 0 {
+		return counts, nil
+	}
+
+	var rows []struct {
+		TargetID int64 `gorm:"column:target_id"`
+		Cnt      int64 `gorm:"column:cnt"`
+	}
+	if err := d.db.WithContext(ctx).Model(&mysqlmodel.Like{}).
+		Select("target_id, COUNT(*) AS cnt").
+		Where("like_type = ? AND target_id IN ? AND status = ?", likeType, targetIDs, int8(1)).
+		Group("target_id").
+		Scan(&rows).Error; err != nil {
+		span.RecordError(err)
+		return nil, err
+	}
+	for _, r := range rows {
+		counts[r.TargetID] = r.Cnt
+	}
+	return counts, nil
+}
+
 // LikeListUserIDsByTarget 查询点赞用户ID列表（仅 status=1）
 func (d *LikeDao) LikeListUserIDsByTarget(ctx context.Context, likeType int8, targetID int64) ([]int64, error) {
 	ctx, span := global.Tracer.Start(ctx, "mysqldao.LikeListUserIDsByTarget")