feat: 重构内容服务，优化数据预加载和用户互动功能；增加租户关注功能及相关测试用例

GEMINI.md

@@ -0,0 +1 @@
+./AGENTS.md

backend/app/services/content.go

@@ -34,9 +34,6 @@ func (s *content) List(ctx context.Context, filter *content_dto.ContentListFilte
 		q = q.Where(tbl.TenantID.Eq(tid))
 	}
 
-	// Preload Author
-	q = q.Preload(tbl.Author)
-
 	// Sort
 	sort := "latest"
 	if filter.Sort != nil && *filter.Sort != "" {
@@ -59,7 +56,14 @@ func (s *content) List(ctx context.Context, filter *content_dto.ContentListFilte
 		return nil, errorx.ErrDatabaseError.WithCause(err)
 	}
 
-	list, err := q.Offset(int(filter.Pagination.Offset())).Limit(int(filter.Pagination.Limit)).Find()
+	// Use UnderlyingDB for complex preloads
+	var list []*models.Content
+	err = q.Offset(int(filter.Pagination.Offset())).Limit(int(filter.Pagination.Limit)).
+		UnderlyingDB().
+		Preload("Author").
+		Preload("ContentAssets.Asset").
+		Find(&list).Error
+
 	if err != nil {
 		return nil, errorx.ErrDatabaseError.WithCause(err)
 	}
@@ -82,7 +86,6 @@ func (s *content) Get(ctx context.Context, id string) (*content_dto.ContentDetai
 	_, q := models.ContentQuery.QueryContext(ctx)
 
 	var item models.Content
-	// Use UnderlyingDB for complex nested preloading
 	err := q.UnderlyingDB().
 		Preload("Author").
 		Preload("ContentAssets", func(db *gorm.DB) *gorm.DB {
@@ -91,6 +94,7 @@ func (s *content) Get(ctx context.Context, id string) (*content_dto.ContentDetai
 		Preload("ContentAssets.Asset").
 		Where("id = ?", cid).
 		First(&item).Error
+
 	if err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, errorx.ErrRecordNotFound
@@ -98,13 +102,21 @@ func (s *content) Get(ctx context.Context, id string) (*content_dto.ContentDetai
 		return nil, errorx.ErrDatabaseError.WithCause(err)
 	}
 
-	// Interaction status (isLiked, isFavorited)
+	// Interaction status
-	userID := ctx.Value(consts.CtxKeyUser)
 	isLiked := false
 	isFavorited := false
-	if userID != nil {
+	if userID := ctx.Value(consts.CtxKeyUser); userID != nil {
-		// uid := cast.ToInt64(userID) // Unused for now until interaction query implemented
+		uid := cast.ToInt64(userID)
-		// ... check likes ...
+		isLiked, _ = models.UserContentActionQuery.WithContext(ctx).
+			Where(models.UserContentActionQuery.UserID.Eq(uid),
+				models.UserContentActionQuery.ContentID.Eq(cid),
+				models.UserContentActionQuery.Type.Eq("like")).
+			Exists()
+		isFavorited, _ = models.UserContentActionQuery.WithContext(ctx).
+			Where(models.UserContentActionQuery.UserID.Eq(uid),
+				models.UserContentActionQuery.ContentID.Eq(cid),
+				models.UserContentActionQuery.Type.Eq("favorite")).
+			Exists()
 	}
 
 	detail := &content_dto.ContentDetail{
@@ -137,25 +149,41 @@ func (s *content) ListComments(ctx context.Context, id string, page int) (*reque
 		return nil, errorx.ErrDatabaseError.WithCause(err)
 	}
 
+	// User likes
+	likedMap := make(map[int64]bool)
+	if userID := ctx.Value(consts.CtxKeyUser); userID != nil {
+		uid := cast.ToInt64(userID)
+		ids := make([]int64, len(list))
+		for i, v := range list {
+			ids[i] = v.ID
+		}
+		likes, _ := models.UserCommentActionQuery.WithContext(ctx).
+			Where(models.UserCommentActionQuery.UserID.Eq(uid),
+				models.UserCommentActionQuery.CommentID.In(ids...),
+				models.UserCommentActionQuery.Type.Eq("like")).
+			Find()
+		for _, l := range likes {
+			likedMap[l.CommentID] = true
+		}
+	}
+
 	data := make([]content_dto.Comment, len(list))
 	for i, v := range list {
 		data[i] = content_dto.Comment{
 			ID:           cast.ToString(v.ID),
 			Content:      v.Content,
 			UserID:       cast.ToString(v.UserID),
-			UserNickname: v.User.Nickname, // Preloaded
+			UserNickname: v.User.Nickname,
 			UserAvatar:   v.User.Avatar,
 			CreateTime:   v.CreatedAt.Format("2006-01-02 15:04:05"),
 			Likes:        int(v.Likes),
 			ReplyTo:      cast.ToString(v.ReplyTo),
+			IsLiked:      likedMap[v.ID],
 		}
 	}
 
 	return &requests.Pager{
-		Pagination: requests.Pagination{
+		Pagination: requests.Pagination{Page: p.Page, Limit: p.Limit},
-			Page:  p.Page,
-			Limit: p.Limit,
-		},
 		Total:      total,
 		Items:      data,
 	}, nil
@@ -189,38 +217,99 @@ func (s *content) CreateComment(ctx context.Context, id string, form *content_dt
 }
 
 func (s *content) LikeComment(ctx context.Context, id string) error {
+	userID := ctx.Value(consts.CtxKeyUser)
+	if userID == nil {
+		return errorx.ErrUnauthorized
+	}
+	uid := cast.ToInt64(userID)
+	cmid := cast.ToInt64(id)
+
+	return models.Q.Transaction(func(tx *models.Query) error {
+		exists, _ := tx.UserCommentAction.WithContext(ctx).
+			Where(tx.UserCommentAction.UserID.Eq(uid), tx.UserCommentAction.CommentID.Eq(cmid), tx.UserCommentAction.Type.Eq("like")).
+			Exists()
+		if exists {
 			return nil
+		}
+
+		action := &models.UserCommentAction{UserID: uid, CommentID: cmid, Type: "like"}
+		if err := tx.UserCommentAction.WithContext(ctx).Create(action); err != nil {
+			return err
+		}
+
+		_, err := tx.Comment.WithContext(ctx).Where(tx.Comment.ID.Eq(cmid)).UpdateSimple(tx.Comment.Likes.Add(1))
+		return err
+	})
 }
 
 func (s *content) GetLibrary(ctx context.Context) ([]user_dto.ContentItem, error) {
+	userID := ctx.Value(consts.CtxKeyUser)
+	if userID == nil {
+		return nil, errorx.ErrUnauthorized
+	}
+	uid := cast.ToInt64(userID)
+
+	tbl, q := models.ContentAccessQuery.QueryContext(ctx)
+	accessList, err := q.Where(tbl.UserID.Eq(uid), tbl.Status.Eq(consts.ContentAccessStatusActive)).Find()
+	if err != nil {
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	if len(accessList) == 0 {
 		return []user_dto.ContentItem{}, nil
+	}
+
+	var contentIDs []int64
+	for _, a := range accessList {
+		contentIDs = append(contentIDs, a.ContentID)
+	}
+
+	ctbl, cq := models.ContentQuery.QueryContext(ctx)
+	var list []*models.Content
+	err = cq.Where(ctbl.ID.In(contentIDs...)).
+		UnderlyingDB().
+		Preload("Author").
+		Preload("ContentAssets.Asset").
+		Find(&list).Error
+	if err != nil {
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	var data []user_dto.ContentItem
+	for _, item := range list {
+		dto := s.toContentItemDTO(item)
+		dto.IsPurchased = true
+		data = append(data, dto)
+	}
+	return data, nil
 }
 
 func (s *content) GetFavorites(ctx context.Context) ([]user_dto.ContentItem, error) {
-	return []user_dto.ContentItem{}, nil
+	return s.getInteractList(ctx, "favorite")
 }
 
 func (s *content) AddFavorite(ctx context.Context, contentId string) error {
-	return nil
+	return s.addInteract(ctx, contentId, "favorite")
 }
 
 func (s *content) RemoveFavorite(ctx context.Context, contentId string) error {
-	return nil
+	return s.removeInteract(ctx, contentId, "favorite")
 }
 
 func (s *content) GetLikes(ctx context.Context) ([]user_dto.ContentItem, error) {
-	return []user_dto.ContentItem{}, nil
+	return s.getInteractList(ctx, "like")
 }
 
 func (s *content) AddLike(ctx context.Context, contentId string) error {
-	return nil
+	return s.addInteract(ctx, contentId, "like")
 }
 
 func (s *content) RemoveLike(ctx context.Context, contentId string) error {
-	return nil
+	return s.removeInteract(ctx, contentId, "like")
 }
 
 func (s *content) ListTopics(ctx context.Context) ([]content_dto.Topic, error) {
+	// topics usually hardcoded or from a dedicated table
 	return []content_dto.Topic{}, nil
 }
 
@@ -239,6 +328,44 @@ func (s *content) toContentItemDTO(item *models.Content) content_dto.ContentItem
 		dto.AuthorName = item.Author.Nickname
 		dto.AuthorAvatar = item.Author.Avatar
 	}
+
+	// Determine Type and Cover from assets
+	var hasVideo, hasAudio bool
+	for _, asset := range item.ContentAssets {
+		if asset.Asset == nil {
+			continue
+		}
+		// Cover
+		if asset.Role == consts.ContentAssetRoleCover {
+			dto.Cover = "http://mock/" + asset.Asset.ObjectKey
+		}
+		// Type detection
+		switch asset.Asset.Type {
+		case consts.MediaAssetTypeVideo:
+			hasVideo = true
+		case consts.MediaAssetTypeAudio:
+			hasAudio = true
+		}
+	}
+
+	// Fallback for cover if not explicitly set as cover role (take first image or whatever)
+	if dto.Cover == "" && len(item.ContentAssets) > 0 {
+		for _, asset := range item.ContentAssets {
+			if asset.Asset != nil && asset.Asset.Type == consts.MediaAssetTypeImage {
+				dto.Cover = "http://mock/" + asset.Asset.ObjectKey
+				break
+			}
+		}
+	}
+
+	if hasVideo {
+		dto.Type = "video"
+	} else if hasAudio {
+		dto.Type = "audio"
+	} else {
+		dto.Type = "article"
+	}
+
 	return dto
 }
 
@@ -246,14 +373,108 @@ func (s *content) toMediaURLs(assets []*models.ContentAsset) []content_dto.Media
 	var urls []content_dto.MediaURL
 	for _, ca := range assets {
 		if ca.Asset != nil {
-			// Construct URL based on Asset info (Bucket/Key/Provider)
-			// For prototype: mock url
 			url := "http://mock/" + ca.Asset.ObjectKey
 			urls = append(urls, content_dto.MediaURL{
-				Type: string(ca.Asset.Type), // Assuming type is enum or string
+				Type: string(ca.Asset.Type),
 				URL:  url,
 			})
 		}
 	}
 	return urls
 }
+
+func (s *content) addInteract(ctx context.Context, contentId, typ string) error {
+	userID := ctx.Value(consts.CtxKeyUser)
+	if userID == nil {
+		return errorx.ErrUnauthorized
+	}
+	uid := cast.ToInt64(userID)
+	cid := cast.ToInt64(contentId)
+
+	return models.Q.Transaction(func(tx *models.Query) error {
+		exists, _ := tx.UserContentAction.WithContext(ctx).
+			Where(tx.UserContentAction.UserID.Eq(uid), tx.UserContentAction.ContentID.Eq(cid), tx.UserContentAction.Type.Eq(typ)).
+			Exists()
+		if exists {
+			return nil
+		}
+
+		action := &models.UserContentAction{UserID: uid, ContentID: cid, Type: typ}
+		if err := tx.UserContentAction.WithContext(ctx).Create(action); err != nil {
+			return err
+		}
+
+		if typ == "like" {
+			_, err := tx.Content.WithContext(ctx).Where(tx.Content.ID.Eq(cid)).UpdateSimple(tx.Content.Likes.Add(1))
+			return err
+		}
+		return nil
+	})
+}
+
+func (s *content) removeInteract(ctx context.Context, contentId, typ string) error {
+	userID := ctx.Value(consts.CtxKeyUser)
+	if userID == nil {
+		return errorx.ErrUnauthorized
+	}
+	uid := cast.ToInt64(userID)
+	cid := cast.ToInt64(contentId)
+
+	return models.Q.Transaction(func(tx *models.Query) error {
+		res, err := tx.UserContentAction.WithContext(ctx).
+			Where(tx.UserContentAction.UserID.Eq(uid), tx.UserContentAction.ContentID.Eq(cid), tx.UserContentAction.Type.Eq(typ)).
+			Delete()
+		if err != nil {
+			return err
+		}
+		if res.RowsAffected == 0 {
+			return nil
+		}
+
+		if typ == "like" {
+			_, err := tx.Content.WithContext(ctx).Where(tx.Content.ID.Eq(cid)).UpdateSimple(tx.Content.Likes.Sub(1))
+			return err
+		}
+		return nil
+	})
+}
+
+func (s *content) getInteractList(ctx context.Context, typ string) ([]user_dto.ContentItem, error) {
+	userID := ctx.Value(consts.CtxKeyUser)
+	if userID == nil {
+		return nil, errorx.ErrUnauthorized
+	}
+	uid := cast.ToInt64(userID)
+
+	tbl, q := models.UserContentActionQuery.QueryContext(ctx)
+	actions, err := q.Where(tbl.UserID.Eq(uid), tbl.Type.Eq(typ)).Find()
+	if err != nil {
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	if len(actions) == 0 {
+		return []user_dto.ContentItem{}, nil
+	}
+
+	var contentIDs []int64
+	for _, a := range actions {
+		contentIDs = append(contentIDs, a.ContentID)
+	}
+
+	ctbl, cq := models.ContentQuery.QueryContext(ctx)
+	var list []*models.Content
+	err = cq.Where(ctbl.ID.In(contentIDs...)).
+		UnderlyingDB().
+		Preload("Author").
+		Preload("ContentAssets.Asset").
+		Find(&list).Error
+	if err != nil {
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	var data []user_dto.ContentItem
+	for _, item := range list {
+		data = append(data, s.toContentItemDTO(item))
+	}
+	return data, nil
+}

backend/app/services/content_test.go

@@ -158,3 +158,104 @@ func (s *ContentTestSuite) Test_CreateComment() {
 		})
 	})
 }
+
+func (s *ContentTestSuite) Test_Library() {
+	Convey("Library", s.T(), func() {
+		ctx := s.T().Context()
+		database.Truncate(ctx, s.DB, models.TableNameContent, models.TableNameContentAccess, models.TableNameUser, models.TableNameContentAsset, models.TableNameMediaAsset)
+
+		// User
+		u := &models.User{Username: "user_lib", Phone: "13900000002"}
+		models.UserQuery.WithContext(ctx).Create(u)
+		ctx = context.WithValue(ctx, consts.CtxKeyUser, u.ID)
+
+		// Content
+		c := &models.Content{TenantID: 1, UserID: u.ID, Title: "Paid Content", Genre: "video"}
+		models.ContentQuery.WithContext(ctx).Create(c)
+
+		// Asset (Video & Cover)
+		assetVid := &models.MediaAsset{TenantID: 1, UserID: u.ID, Type: consts.MediaAssetTypeVideo, ObjectKey: "video.mp4"}
+		assetImg := &models.MediaAsset{TenantID: 1, UserID: u.ID, Type: consts.MediaAssetTypeImage, ObjectKey: "cover.jpg"}
+		models.MediaAssetQuery.WithContext(ctx).Create(assetVid, assetImg)
+
+		models.ContentAssetQuery.WithContext(ctx).Create(
+			&models.ContentAsset{ContentID: c.ID, AssetID: assetVid.ID, Role: consts.ContentAssetRoleMain},
+			&models.ContentAsset{ContentID: c.ID, AssetID: assetImg.ID, Role: consts.ContentAssetRoleCover},
+		)
+
+		// Access
+		models.ContentAccessQuery.WithContext(ctx).Create(&models.ContentAccess{
+			TenantID: 1, UserID: u.ID, ContentID: c.ID, Status: "active",
+		})
+
+		Convey("should get library content with details", func() {
+			list, err := Content.GetLibrary(ctx)
+			So(err, ShouldBeNil)
+			So(len(list), ShouldEqual, 1)
+			So(list[0].Title, ShouldEqual, "Paid Content")
+			So(list[0].Type, ShouldEqual, "video")
+			So(list[0].Cover, ShouldEndWith, "cover.jpg")
+			So(list[0].IsPurchased, ShouldBeTrue)
+		})
+	})
+}
+
+func (s *ContentTestSuite) Test_Interact() {
+	Convey("Interact", s.T(), func() {
+		ctx := s.T().Context()
+		database.Truncate(ctx, s.DB, models.TableNameContent, models.TableNameUserContentAction, models.TableNameUser)
+
+		// User & Content
+		u := &models.User{Username: "user_act", Phone: "13900000003"}
+		models.UserQuery.WithContext(ctx).Create(u)
+		c := &models.Content{TenantID: 1, UserID: u.ID, Title: "Liked Content", Likes: 0}
+		models.ContentQuery.WithContext(ctx).Create(c)
+
+		ctx = context.WithValue(ctx, consts.CtxKeyUser, u.ID)
+
+		Convey("Like flow", func() {
+			// Add Like
+			err := Content.AddLike(ctx, cast.ToString(c.ID))
+			So(err, ShouldBeNil)
+
+			// Verify count
+			cReload, _ := models.ContentQuery.WithContext(ctx).Where(models.ContentQuery.ID.Eq(c.ID)).First()
+			So(cReload.Likes, ShouldEqual, 1)
+
+			// Get Likes
+			likes, err := Content.GetLikes(ctx)
+			So(err, ShouldBeNil)
+			So(len(likes), ShouldEqual, 1)
+			So(likes[0].ID, ShouldEqual, cast.ToString(c.ID))
+
+			// Remove Like
+			err = Content.RemoveLike(ctx, cast.ToString(c.ID))
+			So(err, ShouldBeNil)
+
+			// Verify count
+			cReload, _ = models.ContentQuery.WithContext(ctx).Where(models.ContentQuery.ID.Eq(c.ID)).First()
+			So(cReload.Likes, ShouldEqual, 0)
+		})
+
+		Convey("Favorite flow", func() {
+			// Add Favorite
+			err := Content.AddFavorite(ctx, cast.ToString(c.ID))
+			So(err, ShouldBeNil)
+
+			// Get Favorites
+			favs, err := Content.GetFavorites(ctx)
+			So(err, ShouldBeNil)
+			So(len(favs), ShouldEqual, 1)
+			So(favs[0].ID, ShouldEqual, cast.ToString(c.ID))
+
+			// Remove Favorite
+			err = Content.RemoveFavorite(ctx, cast.ToString(c.ID))
+			So(err, ShouldBeNil)
+
+			// Get Favorites
+			favs, err = Content.GetFavorites(ctx)
+			So(err, ShouldBeNil)
+			So(len(favs), ShouldEqual, 0)
+		})
+	})
+}

backend/app/services/tenant.go

@@ -5,7 +5,7 @@ import (
 	"errors"
 
 	"quyun/v2/app/errorx"
-	tenant_dto "quyun/v2/app/http/v1/dto"
+	"quyun/v2/app/http/v1/dto"
 	"quyun/v2/database/models"
 	"quyun/v2/pkg/consts"
 
@@ -17,21 +17,9 @@ import (
 // @provider
 type tenant struct{}
 
-func (s *tenant) GetPublicProfile(ctx context.Context, id string) (*tenant_dto.TenantProfile, error) {
+func (s *tenant) GetPublicProfile(ctx context.Context, id string) (*dto.TenantProfile, error) {
-	// id could be Code or ID. Try Code first, then ID.
+	tid := cast.ToInt64(id)
-	tbl, q := models.TenantQuery.QueryContext(ctx)
+	t, err := models.TenantQuery.WithContext(ctx).Where(models.TenantQuery.ID.Eq(tid)).First()
-
-	// Try to find by code or ID
-	var t *models.Tenant
-	var err error
-
-	// Assume id is ID for simplicity if numeric, or try both.
-	if cast.ToInt64(id) > 0 {
-		t, err = q.Where(tbl.ID.Eq(cast.ToInt64(id))).First()
-	} else {
-		t, err = q.Where(tbl.Code.Eq(id)).First()
-	}
-
 	if err != nil {
 		if errors.Is(err, gorm.ErrRecordNotFound) {
 			return nil, errorx.ErrRecordNotFound
@@ -40,39 +28,25 @@ func (s *tenant) GetPublicProfile(ctx context.Context, id string) (*tenant_dto.T
 	}
 
 	// Stats
-	// Followers
+	followers, _ := models.TenantUserQuery.WithContext(ctx).Where(models.TenantUserQuery.TenantID.Eq(tid)).Count()
-	followers, _ := models.TenantUserQuery.WithContext(ctx).Where(models.TenantUserQuery.TenantID.Eq(t.ID)).Count()
+	contents, _ := models.ContentQuery.WithContext(ctx).Where(models.ContentQuery.TenantID.Eq(tid), models.ContentQuery.Status.Eq(consts.ContentStatusPublished)).Count()
-	// Contents
-	contentsCount, _ := models.ContentQuery.WithContext(ctx).Where(models.ContentQuery.TenantID.Eq(t.ID), models.ContentQuery.Status.Eq(consts.ContentStatusPublished)).Count()
-	// Likes
-	var likes int64
-	// Sum content likes
-	// Mock likes for now or fetch
 
-	// IsFollowing
+	// Following status
 	isFollowing := false
-	userID := ctx.Value(consts.CtxKeyUser)
+	if userID := ctx.Value(consts.CtxKeyUser); userID != nil {
-	if userID != nil {
 		uid := cast.ToInt64(userID)
-		count, _ := models.TenantUserQuery.WithContext(ctx).Where(models.TenantUserQuery.TenantID.Eq(t.ID), models.TenantUserQuery.UserID.Eq(uid)).Count()
+		isFollowing, _ = models.TenantUserQuery.WithContext(ctx).
-		isFollowing = count > 0
+			Where(models.TenantUserQuery.TenantID.Eq(tid), models.TenantUserQuery.UserID.Eq(uid)).
+			Exists()
 	}
 
-	// Config parsing (Unused for now as we don't map to bio yet)
+	return &dto.TenantProfile{
-	// config := t.Config.Data()
-
-	return &tenant_dto.TenantProfile{
 		ID:     cast.ToString(t.ID),
 		Name:   t.Name,
-		Avatar:      "",         // From config
+		Avatar: "", // Extract from config if available
-		Cover:       "",         // From config
+		Stats: dto.Stats{
-		Bio:         "",         // From config
-		Description: "",         // From config
-		CertType:    "personal", // Mock
-		Stats: tenant_dto.Stats{
 			Followers: int(followers),
-			Contents:  int(contentsCount),
+			Contents:  int(contents),
-			Likes:     int(likes),
 		},
 		IsFollowing: isFollowing,
 	}, nil
@@ -87,12 +61,10 @@ func (s *tenant) Follow(ctx context.Context, id string) error {
 	tid := cast.ToInt64(id)
 
 	// Check if tenant exists
-	_, err := models.TenantQuery.WithContext(ctx).Where(models.TenantQuery.ID.Eq(tid)).First()
+	if _, err := models.TenantQuery.WithContext(ctx).Where(models.TenantQuery.ID.Eq(tid)).First(); err != nil {
-	if err != nil {
 		return errorx.ErrRecordNotFound
 	}
 
-	// Add to tenant_users
 	tu := &models.TenantUser{
 		TenantID: tid,
 		UserID:   uid,
@@ -100,12 +72,7 @@ func (s *tenant) Follow(ctx context.Context, id string) error {
 		Status:   consts.UserStatusVerified,
 	}
 
-	count, _ := models.TenantUserQuery.WithContext(ctx).Where(models.TenantUserQuery.TenantID.Eq(tid), models.TenantUserQuery.UserID.Eq(uid)).Count()
+	if err := models.TenantUserQuery.WithContext(ctx).Save(tu); err != nil {
-	if count > 0 {
-		return nil // Already following
-	}
-
-	if err := models.TenantUserQuery.WithContext(ctx).Create(tu); err != nil {
 		return errorx.ErrDatabaseError.WithCause(err)
 	}
 	return nil
@@ -119,9 +86,51 @@ func (s *tenant) Unfollow(ctx context.Context, id string) error {
 	uid := cast.ToInt64(userID)
 	tid := cast.ToInt64(id)
 
-	_, err := models.TenantUserQuery.WithContext(ctx).Where(models.TenantUserQuery.TenantID.Eq(tid), models.TenantUserQuery.UserID.Eq(uid)).Delete()
+	_, err := models.TenantUserQuery.WithContext(ctx).
+		Where(models.TenantUserQuery.TenantID.Eq(tid), models.TenantUserQuery.UserID.Eq(uid)).
+		Delete()
 	if err != nil {
 		return errorx.ErrDatabaseError.WithCause(err)
 	}
 	return nil
 }
+
+func (s *tenant) ListFollowed(ctx context.Context) ([]dto.TenantProfile, error) {
+	userID := ctx.Value(consts.CtxKeyUser)
+	if userID == nil {
+		return nil, errorx.ErrUnauthorized
+	}
+	uid := cast.ToInt64(userID)
+
+	tbl, q := models.TenantUserQuery.QueryContext(ctx)
+	list, err := q.Where(tbl.UserID.Eq(uid)).Find()
+	if err != nil {
+		return nil, errorx.ErrDatabaseError.WithCause(err)
+	}
+
+	var data []dto.TenantProfile
+	for _, tu := range list {
+		// Fetch Tenant
+		t, err := models.TenantQuery.WithContext(ctx).Where(models.TenantQuery.ID.Eq(tu.TenantID)).First()
+		if err != nil {
+			continue
+		}
+
+		// Stats
+		followers, _ := models.TenantUserQuery.WithContext(ctx).Where(models.TenantUserQuery.TenantID.Eq(tu.TenantID)).Count()
+		contents, _ := models.ContentQuery.WithContext(ctx).Where(models.ContentQuery.TenantID.Eq(tu.TenantID), models.ContentQuery.Status.Eq(consts.ContentStatusPublished)).Count()
+
+		data = append(data, dto.TenantProfile{
+			ID:     cast.ToString(t.ID),
+			Name:   t.Name,
+			Avatar: "",
+			Stats: dto.Stats{
+				Followers: int(followers),
+				Contents:  int(contents),
+			},
+			IsFollowing: true,
+		})
+	}
+
+	return data, nil
+}

backend/app/services/tenant_test.go

@@ -0,0 +1,81 @@
+package services
+
+import (
+	"context"
+	"database/sql"
+	"testing"
+
+	"quyun/v2/app/commands/testx"
+	"quyun/v2/database"
+	"quyun/v2/database/models"
+	"quyun/v2/pkg/consts"
+
+	. "github.com/smartystreets/goconvey/convey"
+	"github.com/spf13/cast"
+	"github.com/stretchr/testify/suite"
+	"go.ipao.vip/atom/contracts"
+	"go.uber.org/dig"
+)
+
+type TenantTestSuiteInjectParams struct {
+	dig.In
+
+	DB       *sql.DB
+	Initials []contracts.Initial `group:"initials"`
+}
+
+type TenantTestSuite struct {
+	suite.Suite
+	TenantTestSuiteInjectParams
+}
+
+func Test_Tenant(t *testing.T) {
+	providers := testx.Default().With(Provide)
+
+	testx.Serve(providers, t, func(p TenantTestSuiteInjectParams) {
+		suite.Run(t, &TenantTestSuite{TenantTestSuiteInjectParams: p})
+	})
+}
+
+func (s *TenantTestSuite) Test_Follow() {
+	Convey("Follow Flow", s.T(), func() {
+		ctx := s.T().Context()
+		database.Truncate(ctx, s.DB, models.TableNameTenant, models.TableNameTenantUser, models.TableNameUser)
+
+		// User
+		u := &models.User{Username: "user_f", Phone: "13900000004"}
+		models.UserQuery.WithContext(ctx).Create(u)
+		ctx = context.WithValue(ctx, consts.CtxKeyUser, u.ID)
+
+		// Tenant
+		t := &models.Tenant{Name: "Tenant A", Status: consts.TenantStatusVerified}
+		models.TenantQuery.WithContext(ctx).Create(t)
+
+		Convey("should follow tenant", func() {
+			err := Tenant.Follow(ctx, cast.ToString(t.ID))
+			So(err, ShouldBeNil)
+
+			// Verify stats
+			profile, err := Tenant.GetPublicProfile(ctx, cast.ToString(t.ID))
+			So(err, ShouldBeNil)
+			So(profile.IsFollowing, ShouldBeTrue)
+			So(profile.Stats.Followers, ShouldEqual, 1)
+
+			// List Followed
+			list, err := Tenant.ListFollowed(ctx)
+			So(err, ShouldBeNil)
+			So(len(list), ShouldEqual, 1)
+			So(list[0].Name, ShouldEqual, "Tenant A")
+
+			// Unfollow
+			err = Tenant.Unfollow(ctx, cast.ToString(t.ID))
+			So(err, ShouldBeNil)
+
+			// Verify
+			profile, err = Tenant.GetPublicProfile(ctx, cast.ToString(t.ID))
+			So(err, ShouldBeNil)
+			So(profile.IsFollowing, ShouldBeFalse)
+			So(profile.Stats.Followers, ShouldEqual, 0)
+		})
+	})
+}