Method FollowUser

internal/repository/dao/relation.go:96–131

FollowUser 关注用户，并更新相关计数器

(ctx context.Context, followerID, followeeID int64)

// FollowUser 关注用户，并更新相关计数器
func (r *relationDAO) FollowUser(ctx context.Context, followerID, followeeID int64) error {
	now := r.getCurrentTime()

	err := r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		// 创建Relation记录
		newRelation := &Relation{
			FollowerID: followerID,
			FolloweeID: followeeID,
			Status:     FollowStatus,
			CreatedAt:  now,
			UpdatedAt:  now,
		}
		if err := tx.Create(newRelation).Error; err != nil {
			return err
		}

		// 更新关注者的关注数
		if err := r.updateRelationCount(tx, followerID, "followee_count", 1, now); err != nil {
			return err
		}

		// 更新被关注者的粉丝数
		if err := r.updateRelationCount(tx, followeeID, "follower_count", 1, now); err != nil {
			return err
		}

		return nil
	})

	if err != nil {
		r.l.Error("failed to follow user", zap.Error(err))
		return err
	}

	return nil
}

// CancelFollowUser 取消关注用户，并更新相关计数器
func (r *relationDAO) CancelFollowUser(ctx context.Context, followerID, followeeID int64) error {