Method Follow

internal/database/users.go:629–648

Follow marks the user to follow the other user.

(ctx context.Context, userID, followID int64)

// Follow marks the user to follow the other user.
func (s *UsersStore) Follow(ctx context.Context, userID, followID int64) error {
	if userID == followID {
		return nil
	}

	return s.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
		f := &Follow{
			UserID:   userID,
			FollowID: followID,
		}
		result := tx.FirstOrCreate(f, f)
		if result.Error != nil {
			return errors.Wrap(result.Error, "upsert")
		} else if result.RowsAffected <= 0 {
			return nil // Relation already exists
		}

		return s.recountFollows(tx, userID, followID)
	})
}

// Unfollow removes the mark the user to follow the other user.
func (s *UsersStore) Unfollow(ctx context.Context, userID, followID int64) error {