🎨 优化文章和讲师接口

service/app/user.go

@@ -250,14 +250,34 @@ func (u *AppUserService) GetTeacherList(p common.PageInfo) (list []vo.TeacherInf
 		return nil, 0, err
 	}
 
-	// 获取每个教师的粉丝数
-	for i := range list {
-		followCount, err := u.GetTeacherFansCount(list[i].ID)
+	// 批量查询所有教师的粉丝数
+	var teacherIDs []uint
+	for _, t := range list {
+		teacherIDs = append(teacherIDs, t.ID)
+	}
+	type FansCount struct {
+		TeacherId uint
+		Count     int64
+	}
+	var fansCounts []FansCount
+	if len(teacherIDs) > 0 {
+		err = global.GVA_DB.Model(&app.Follow{}).
+			Select("teacher_id, count(*) as count").
+			Where("teacher_id IN ?", teacherIDs).
+			Group("teacher_id").
+			Scan(&fansCounts).Error
 		if err != nil {
-			global.GVA_LOG.Error("查询教师粉丝数失败", zap.Error(err))
+			global.GVA_LOG.Error("批量查询教师粉丝数失败", zap.Error(err))
 			return nil, 0, err
 		}
-		list[i].Follow = followCount
+	}
+	// 映射粉丝数
+	fansMap := make(map[uint]int64)
+	for _, fc := range fansCounts {
+		fansMap[fc.TeacherId] = fc.Count
+	}
+	for i := range list {
+		list[i].Follow = fansMap[list[i].ID]
 	}
 
 	return