🎨 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

service/article/article.go

@@ -64,11 +64,8 @@ func (s ArticleService) APPGetArticleList(pageInfo request.GetList) (list []vo.A
 	offset := pageInfo.PageSize * (pageInfo.Page - 1)
 
 	db := global.GVA_DB.Model(&article.Article{}).Where("status = 1") // 只查询已发布的文章
-	err = db.Count(&total).Error
-	if err != nil {
-		return
-	}
 
+	// 优化：先构建所有筛选条件再查询总数和数据
 	if pageInfo.Title != "" {
 		db = db.Where("title LIKE ?", "%"+pageInfo.Title+"%")
 	}
@@ -78,14 +75,41 @@ func (s ArticleService) APPGetArticleList(pageInfo request.GetList) (list []vo.A
 	if pageInfo.TeacherId != 0 {
 		db = db.Where("teacher_id = ?", pageInfo.TeacherId)
 	}
-
 	if pageInfo.Keyword != "" {
 		db = db.Where("title LIKE ? OR article.desc LIKE ? OR teacher_name LIKE ?", "%"+pageInfo.Keyword+"%", "%"+pageInfo.Keyword+"%", "%"+pageInfo.Keyword+"%")
 	}
 
+	// 先查总数
+	err = db.Count(&total).Error
+	if err != nil {
+		return
+	}
+
+	// 批量查出teacher_id
 	err = db.Limit(limit).Offset(offset).Omit("teacher_avatar").Order("created_at desc").Find(&list).Error
+	if err != nil {
+		return
+	}
+
+	// 优化：批量查询讲师头像，避免N+1查询
+	teacherIds := make([]int, 0, len(list))
+	for _, a := range list {
+		teacherIds = append(teacherIds, a.TeacherId)
+	}
+	avatars := make(map[int]string)
+	if len(teacherIds) > 0 {
+		type avatarResult struct {
+			ID     int
+			Avatar string
+		}
+		var results []avatarResult
+		global.GVA_DB.Table("app_user").Select("id, avatar").Where("id IN ?", teacherIds).Find(&results)
+		for _, r := range results {
+			avatars[r.ID] = r.Avatar
+		}
+	}
 	for i, a := range list {
-		global.GVA_DB.Table("app_user").Select("avatar").Where("id = ?", a.TeacherId).Scan(&list[i].TeacherAvatar)
+		list[i].TeacherAvatar = avatars[a.TeacherId]
 	}
 
 	return
@@ -113,9 +137,37 @@ func (s ArticleService) APPGetArticle(id string, userId int) (article *vo.Articl
 
 		// 如果count = 0 或者 TeacherId 不等于 userId，表示用户没有购买过该文章
 		if count == 0 && article.TeacherId != userId {
-			// 用户没有购买过，隐藏Content
-			article.Content = ""
-			article.IsBuy = 0 // 设置为未购买
+
+			// 判断用户是否已经包月该讲师和是否是讲师本人
+			if userId != 0 && userId != article.TeacherId {
+				var userTeacherVip []app.UserTeacherVip
+				err = global.GVA_DB.Model(&app.UserTeacherVip{}).Where("teacher_id = ? AND user_id = ? AND is_expire = 1", article.TeacherId, userId).Find(&userTeacherVip).Count(&count).Error
+				if err != nil {
+					global.GVA_LOG.Error("查询用户包月记录失败", zap.Error(err))
+					return nil, err
+				}
+
+				for _, vip := range userTeacherVip {
+					//  获取包月的信息 判断文章是否在包月范围内
+					var teacherVipInfo app.TeacherVip
+					err = global.GVA_DB.Model(&app.TeacherVip{}).Where("id = ?", vip.TeacherVipId).First(&teacherVipInfo).Error
+					if err != nil {
+						global.GVA_LOG.Error("查询讲师包月信息失败", zap.Error(err))
+						return nil, err
+					}
+
+					// 用户包月了，判断文章是否在包月范围内
+					if count != 0 {
+						if teacherVipInfo.CategoryId == article.CategoryId {
+							return
+						}
+					}
+				}
+				// 用户没有购买过，隐藏Content
+				article.Content = ""
+				article.IsBuy = 0 // 设置为未购买
+			}
+
 		}
 	}