f

internal/application/subordinate/dto/responses/subordinate_responses.go

@@ -4,7 +4,7 @@ import "time"
 
 // CreateInvitationResponse 创建邀请
 type CreateInvitationResponse struct {
-	InviteToken  string    `json:"invite_token" description:"仅返回一次,请转达被邀请人"`
+	InviteToken  string    `json:"invite_token" description:"主账号固定邀请码,可重复使用"`
 	InviteURL    string    `json:"invite_url" description:"子站注册完整链接"`
 	ExpiresAt    time.Time `json:"expires_at"`
 	InvitationID string    `json:"invitation_id"`

internal/application/subordinate/subordinate_application_service_impl.go

@@ -81,8 +81,15 @@ func (s *SubordinateApplicationServiceImpl) RegisterSubPortal(ctx context.Contex
 		if inv == nil {
 			return fmt.Errorf("邀请码无效")
 		}
-		if inv.Status != subentities.InvitationStatusPending {
-			return fmt.Errorf("邀请码已使用或已失效")
+		switch inv.Status {
+		case subentities.InvitationStatusRevoked:
+			return fmt.Errorf("邀请码已失效")
+		case subentities.InvitationStatusConsumed:
+			return fmt.Errorf("邀请码已失效，请联系主账号获取新邀请码")
+		case subentities.InvitationStatusPending:
+			// 固定邀请码可重复使用，注册后不核销
+		default:
+			return fmt.Errorf("邀请码无效")
 		}
 		now := time.Now()
 		if now.After(inv.ExpiresAt) {
@@ -105,15 +112,6 @@ func (s *SubordinateApplicationServiceImpl) RegisterSubPortal(ctx context.Contex
 			return fmt.Errorf("注册失败，请重试或联系主账号")
 		}
 
-		consumed, consumeErr := s.subRepo.ConsumeInvitation(txCtx, inv.ID, u.ID, now)
-		if consumeErr != nil {
-			s.logger.Error("核销邀请失败", zap.Error(consumeErr), zap.String("user_id", u.ID))
-			return fmt.Errorf("注册失败，请重试或联系主账号")
-		}
-		if !consumed {
-			return fmt.Errorf("邀请码已使用或已失效")
-		}
-
 		resp = &responses.SubPortalRegisterResponse{ID: u.ID, Phone: u.Phone}
 		return nil
 	})
@@ -123,8 +121,19 @@ func (s *SubordinateApplicationServiceImpl) RegisterSubPortal(ctx context.Contex
 	return resp, nil
 }
 
-// CreateInvitation 主账号发邀请
+// CreateInvitation 获取或创建主账号固定邀请码（可重复使用）
 func (s *SubordinateApplicationServiceImpl) CreateInvitation(ctx context.Context, cmd *commands.CreateInvitationCommand) (*responses.CreateInvitationResponse, error) {
+	existing, err := s.subRepo.FindActiveInvitationByParent(ctx, cmd.ParentUserID)
+	if err != nil {
+		return nil, err
+	}
+	if existing != nil {
+		if raw := strings.TrimSpace(existing.Token); raw != "" {
+			return s.buildInvitationResponse(existing, raw)
+		}
+		// 历史 pending 记录未存明文，无法找回，继续创建新的固定邀请码
+	}
+
 	hours := cmd.ExpiresInHours
 	if hours <= 0 {
 		// 永久有效：设置100年后过期
@@ -136,6 +145,7 @@ func (s *SubordinateApplicationServiceImpl) CreateInvitation(ctx context.Context
 	}
 	inv := &subentities.SubordinateInvitation{
 		ParentUserID: cmd.ParentUserID,
+		Token:        raw,
 		TokenHash:    hash,
 		ExpiresAt:    time.Now().Add(time.Duration(hours) * time.Hour),
 		Status:       subentities.InvitationStatusPending,
@@ -143,6 +153,10 @@ func (s *SubordinateApplicationServiceImpl) CreateInvitation(ctx context.Context
 	if err := s.subRepo.CreateInvitation(ctx, inv); err != nil {
 		return nil, err
 	}
+	return s.buildInvitationResponse(inv, raw)
+}
+
+func (s *SubordinateApplicationServiceImpl) buildInvitationResponse(inv *subentities.SubordinateInvitation, raw string) (*responses.CreateInvitationResponse, error) {
 	base := strings.TrimSpace(os.Getenv("SUB_PORTAL_BASE_URL"))
 	if base == "" {
 		base = s.cfg.App.SubPortalBaseURL

internal/domains/subordinate/entities/invitation.go

@@ -16,10 +16,11 @@ const (
 	InvitationStatusRevoked  InvitationStatus = "revoked"
 )
 
-// SubordinateInvitation 主账号邀请记录（存 token 哈希）
+// SubordinateInvitation 主账号邀请记录（主账号固定邀请码，可重复使用）
 type SubordinateInvitation struct {
 	ID         string `gorm:"primaryKey;type:varchar(36)" json:"id" comment:"唯一标识"`
 	ParentUserID string `gorm:"type:varchar(36);not null;index" json:"parent_user_id" comment:"主账号用户ID"`
+	Token      string `gorm:"type:char(6)" json:"-" comment:"邀请码明文(6位)"`
 	TokenHash  string `gorm:"type:varchar(64);not null;uniqueIndex" json:"-" comment:"邀请码的SHA256(十六进制)"`
 	ExpiresAt  time.Time `gorm:"not null;index" json:"expires_at" comment:"过期时间"`
 	Status     InvitationStatus `gorm:"type:varchar(20);not null;default:pending" json:"status" comment:"状态"`

internal/domains/subordinate/repositories/subordinate_repository_interface.go

@@ -12,6 +12,7 @@ type SubordinateRepository interface {
 	CreateInvitation(ctx context.Context, inv *entities.SubordinateInvitation) error
 	FindInvitationByTokenHash(ctx context.Context, tokenHash string) (*entities.SubordinateInvitation, error)
 	FindInvitationByID(ctx context.Context, id string) (*entities.SubordinateInvitation, error)
+	FindActiveInvitationByParent(ctx context.Context, parentUserID string) (*entities.SubordinateInvitation, error)
 	UpdateInvitation(ctx context.Context, inv *entities.SubordinateInvitation) error
 	ConsumeInvitation(ctx context.Context, invitationID, childUserID string, consumedAt time.Time) (bool, error)
 	ListInvitationsByParent(ctx context.Context, parentUserID string, limit, offset int) ([]*entities.SubordinateInvitation, int64, error)

internal/infrastructure/database/repositories/subordinate/gorm_subordinate_repository.go

@@ -52,6 +52,22 @@ func (r *GormSubordinateRepository) FindInvitationByTokenHash(ctx context.Contex
 	return &inv, nil
 }
 
+// FindActiveInvitationByParent 查询主账号当前可用的固定邀请码（pending 且未过期）
+func (r *GormSubordinateRepository) FindActiveInvitationByParent(ctx context.Context, parentUserID string) (*entities.SubordinateInvitation, error) {
+	var inv entities.SubordinateInvitation
+	err := r.withCtx(ctx).
+		Where("parent_user_id = ? AND status = ? AND expires_at > ?", parentUserID, entities.InvitationStatusPending, time.Now()).
+		Order("created_at ASC").
+		First(&inv).Error
+	if err != nil {
+		if errors.Is(err, gorm.ErrRecordNotFound) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &inv, nil
+}
+
 // FindInvitationByID 按ID
 func (r *GormSubordinateRepository) FindInvitationByID(ctx context.Context, id string) (*entities.SubordinateInvitation, error) {
 	var inv entities.SubordinateInvitation