Fix expense to be nullable without raw material.

internal/contract/analytics_contract.go

@@ -107,10 +107,10 @@ type PurchasingAnalyticsResponse struct {
 type PurchasingSummary struct {
 	TotalPurchases            float64 `json:"total_purchases"`
 	RawMaterialPurchases      float64 `json:"raw_material_purchases"`
-	NonInventoryPurchases     float64 `json:"non_inventory_purchases"`
+	ExpensePurchases          float64 `json:"expense_purchases"`
 	TotalPurchaseOrders       int64   `json:"total_purchase_orders"`
 	RawMaterialPurchaseOrders int64   `json:"raw_material_purchase_orders"`
-	NonInventoryExpenseCount  int64   `json:"non_inventory_expense_count"`
+	ExpenseCount              int64   `json:"expense_count"`
 	TotalQuantity             float64 `json:"total_quantity"`
 	AveragePurchaseOrderValue float64 `json:"average_purchase_order_value"`
 	TotalIngredients          int64   `json:"total_ingredients"`
@@ -121,10 +121,10 @@ type PurchasingAnalyticsData struct {
 	Date                      time.Time `json:"date"`
 	Purchases                 float64   `json:"purchases"`
 	RawMaterialPurchases      float64   `json:"raw_material_purchases"`
-	NonInventoryPurchases     float64   `json:"non_inventory_purchases"`
+	ExpensePurchases          float64   `json:"expense_purchases"`
 	PurchaseOrders            int64     `json:"purchase_orders"`
 	RawMaterialPurchaseOrders int64     `json:"raw_material_purchase_orders"`
-	NonInventoryExpenseCount  int64     `json:"non_inventory_expense_count"`
+	ExpenseCount              int64     `json:"expense_count"`
 	Quantity                  float64   `json:"quantity"`
 	Ingredients               int64     `json:"ingredients"`
 	Vendors                   int64     `json:"vendors"`

internal/contract/purchase_category_contract.go

@@ -10,7 +10,7 @@ type CreatePurchaseCategoryRequest struct {
 	ParentID  *uuid.UUID `json:"parent_id,omitempty"`
 	Code      *string    `json:"code,omitempty"`
 	Name      string     `json:"name" validate:"required,min=1,max=255"`
-	Type      string     `json:"type" validate:"required,oneof=raw_material non_inventory"`
+	Type      string     `json:"type" validate:"required,oneof=raw_material expense"`
 	SortOrder *int       `json:"sort_order,omitempty"`
 	IsActive  *bool      `json:"is_active,omitempty"`
 }
@@ -19,14 +19,14 @@ type UpdatePurchaseCategoryRequest struct {
 	ParentID  *uuid.UUID `json:"parent_id,omitempty"`
 	Code      *string    `json:"code,omitempty"`
 	Name      *string    `json:"name,omitempty" validate:"omitempty,min=1,max=255"`
-	Type      *string    `json:"type,omitempty" validate:"omitempty,oneof=raw_material non_inventory"`
+	Type      *string    `json:"type,omitempty" validate:"omitempty,oneof=raw_material expense"`
 	SortOrder *int       `json:"sort_order,omitempty"`
 	IsActive  *bool      `json:"is_active,omitempty"`
 }
 
 type ListPurchaseCategoriesRequest struct {
 	ParentID *uuid.UUID `json:"parent_id,omitempty"`
-	Type     string     `json:"type,omitempty" validate:"omitempty,oneof=raw_material non_inventory"`
+	Type     string     `json:"type,omitempty" validate:"omitempty,oneof=raw_material expense"`
 	Search   string     `json:"search,omitempty"`
 	IsActive *bool      `json:"is_active,omitempty"`
 	Page     int        `json:"page" validate:"required,min=1"`

internal/contract/purchase_order_contract.go

@@ -19,11 +19,11 @@ type CreatePurchaseOrderRequest struct {
 }
 
 type CreatePurchaseOrderItemRequest struct {
-	IngredientID       uuid.UUID `json:"ingredient_id" validate:"required"`
+	IngredientID       *uuid.UUID `json:"ingredient_id,omitempty" validate:"omitempty"`
 	PurchaseCategoryID uuid.UUID  `json:"purchase_category_id" validate:"required"`
 	Description        *string    `json:"description,omitempty" validate:"omitempty"`
-	Quantity           float64   `json:"quantity" validate:"required,gt=0"`
+	Quantity           *float64   `json:"quantity,omitempty" validate:"omitempty,gt=0"`
-	UnitID             uuid.UUID `json:"unit_id" validate:"required"`
+	UnitID             *uuid.UUID `json:"unit_id,omitempty" validate:"omitempty"`
 	Amount             float64    `json:"amount" validate:"required,gte=0"`
 }
 
@@ -70,11 +70,11 @@ type PurchaseOrderResponse struct {
 type PurchaseOrderItemResponse struct {
 	ID                 uuid.UUID                 `json:"id"`
 	PurchaseOrderID    uuid.UUID                 `json:"purchase_order_id"`
-	IngredientID       uuid.UUID                 `json:"ingredient_id"`
+	IngredientID       *uuid.UUID                `json:"ingredient_id"`
 	PurchaseCategoryID uuid.UUID                 `json:"purchase_category_id"`
 	Description        *string                   `json:"description"`
-	Quantity           float64                   `json:"quantity"`
+	Quantity           *float64                  `json:"quantity"`
-	UnitID             uuid.UUID                 `json:"unit_id"`
+	UnitID             *uuid.UUID                `json:"unit_id"`
 	Amount             float64                   `json:"amount"`
 	CreatedAt          time.Time                 `json:"created_at"`
 	UpdatedAt          time.Time                 `json:"updated_at"`

internal/entities/analytics.go

@@ -39,10 +39,10 @@ type PurchasingAnalytics struct {
 type PurchasingSummary struct {
 	TotalPurchases            float64 `json:"total_purchases"`
 	RawMaterialPurchases      float64 `json:"raw_material_purchases"`
-	NonInventoryPurchases     float64 `json:"non_inventory_purchases"`
+	ExpensePurchases          float64 `json:"expense_purchases"`
 	TotalPurchaseOrders       int64   `json:"total_purchase_orders"`
 	RawMaterialPurchaseOrders int64   `json:"raw_material_purchase_orders"`
-	NonInventoryExpenseCount  int64   `json:"non_inventory_expense_count"`
+	ExpenseCount              int64   `json:"expense_count"`
 	TotalQuantity             float64 `json:"total_quantity"`
 	AveragePurchaseOrderValue float64 `json:"average_purchase_order_value"`
 	TotalIngredients          int64   `json:"total_ingredients"`
@@ -53,10 +53,10 @@ type PurchasingAnalyticsData struct {
 	Date                      time.Time `json:"date"`
 	Purchases                 float64   `json:"purchases"`
 	RawMaterialPurchases      float64   `json:"raw_material_purchases"`
-	NonInventoryPurchases     float64   `json:"non_inventory_purchases"`
+	ExpensePurchases          float64   `json:"expense_purchases"`
 	PurchaseOrders            int64     `json:"purchase_orders"`
 	RawMaterialPurchaseOrders int64     `json:"raw_material_purchase_orders"`
-	NonInventoryExpenseCount  int64     `json:"non_inventory_expense_count"`
+	ExpenseCount              int64     `json:"expense_count"`
 	Quantity                  float64   `json:"quantity"`
 	Ingredients               int64     `json:"ingredients"`
 	Vendors                   int64     `json:"vendors"`

internal/entities/purchase_category.go

@@ -11,7 +11,7 @@ type PurchaseCategoryType string
 
 const (
 	PurchaseCategoryTypeRawMaterial PurchaseCategoryType = "raw_material"
-	PurchaseCategoryTypeNonInventory PurchaseCategoryType = "non_inventory"
+	PurchaseCategoryTypeExpense     PurchaseCategoryType = "expense"
 )
 
 type PurchaseCategoryPreset struct {

internal/entities/purchase_order.go

@@ -43,11 +43,11 @@ func (PurchaseOrder) TableName() string {
 type PurchaseOrderItem struct {
 	ID                 uuid.UUID  `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
 	PurchaseOrderID    uuid.UUID  `gorm:"type:uuid;not null" json:"purchase_order_id" validate:"required"`
-	IngredientID       uuid.UUID `gorm:"type:uuid;not null" json:"ingredient_id" validate:"required"`
+	IngredientID       *uuid.UUID `gorm:"type:uuid" json:"ingredient_id" validate:"omitempty"`
 	PurchaseCategoryID uuid.UUID  `gorm:"type:uuid;not null;index" json:"purchase_category_id" validate:"required"`
 	Description        *string    `gorm:"type:text" json:"description" validate:"omitempty"`
-	Quantity           float64   `gorm:"type:decimal(10,3);not null" json:"quantity" validate:"required,gt=0"`
+	Quantity           *float64   `gorm:"type:decimal(10,3)" json:"quantity" validate:"omitempty,gt=0"`
-	UnitID             uuid.UUID `gorm:"type:uuid;not null" json:"unit_id" validate:"required"`
+	UnitID             *uuid.UUID `gorm:"type:uuid" json:"unit_id" validate:"omitempty"`
 	Amount             float64    `gorm:"type:decimal(15,2);not null" json:"amount" validate:"required,gte=0"`
 	CreatedAt          time.Time  `gorm:"autoCreateTime" json:"created_at"`
 	UpdatedAt          time.Time  `gorm:"autoUpdateTime" json:"updated_at"`

internal/models/analytics.go

@@ -114,10 +114,10 @@ type PurchasingAnalyticsResponse struct {
 type PurchasingSummary struct {
 	TotalPurchases            float64 `json:"total_purchases"`
 	RawMaterialPurchases      float64 `json:"raw_material_purchases"`
-	NonInventoryPurchases     float64 `json:"non_inventory_purchases"`
+	ExpensePurchases          float64 `json:"expense_purchases"`
 	TotalPurchaseOrders       int64   `json:"total_purchase_orders"`
 	RawMaterialPurchaseOrders int64   `json:"raw_material_purchase_orders"`
-	NonInventoryExpenseCount  int64   `json:"non_inventory_expense_count"`
+	ExpenseCount              int64   `json:"expense_count"`
 	TotalQuantity             float64 `json:"total_quantity"`
 	AveragePurchaseOrderValue float64 `json:"average_purchase_order_value"`
 	TotalIngredients          int64   `json:"total_ingredients"`
@@ -129,10 +129,10 @@ type PurchasingAnalyticsData struct {
 	Date                      time.Time `json:"date"`
 	Purchases                 float64   `json:"purchases"`
 	RawMaterialPurchases      float64   `json:"raw_material_purchases"`
-	NonInventoryPurchases     float64   `json:"non_inventory_purchases"`
+	ExpensePurchases          float64   `json:"expense_purchases"`
 	PurchaseOrders            int64     `json:"purchase_orders"`
 	RawMaterialPurchaseOrders int64     `json:"raw_material_purchase_orders"`
-	NonInventoryExpenseCount  int64     `json:"non_inventory_expense_count"`
+	ExpenseCount              int64     `json:"expense_count"`
 	Quantity                  float64   `json:"quantity"`
 	Ingredients               int64     `json:"ingredients"`
 	Vendors                   int64     `json:"vendors"`

internal/models/purchase_order.go

@@ -24,11 +24,11 @@ type PurchaseOrder struct {
 type PurchaseOrderItem struct {
 	ID                 uuid.UUID  `json:"id"`
 	PurchaseOrderID    uuid.UUID  `json:"purchase_order_id"`
-	IngredientID       uuid.UUID `json:"ingredient_id"`
+	IngredientID       *uuid.UUID `json:"ingredient_id"`
 	PurchaseCategoryID uuid.UUID  `json:"purchase_category_id"`
 	Description        *string    `json:"description"`
-	Quantity           float64   `json:"quantity"`
+	Quantity           *float64   `json:"quantity"`
-	UnitID             uuid.UUID `json:"unit_id"`
+	UnitID             *uuid.UUID `json:"unit_id"`
 	Amount             float64    `json:"amount"`
 	CreatedAt          time.Time  `json:"created_at"`
 	UpdatedAt          time.Time  `json:"updated_at"`
@@ -62,11 +62,11 @@ type PurchaseOrderResponse struct {
 type PurchaseOrderItemResponse struct {
 	ID                 uuid.UUID                 `json:"id"`
 	PurchaseOrderID    uuid.UUID                 `json:"purchase_order_id"`
-	IngredientID       uuid.UUID                 `json:"ingredient_id"`
+	IngredientID       *uuid.UUID                `json:"ingredient_id"`
 	PurchaseCategoryID uuid.UUID                 `json:"purchase_category_id"`
 	Description        *string                   `json:"description"`
-	Quantity           float64                   `json:"quantity"`
+	Quantity           *float64                  `json:"quantity"`
-	UnitID             uuid.UUID                 `json:"unit_id"`
+	UnitID             *uuid.UUID                `json:"unit_id"`
 	Amount             float64                   `json:"amount"`
 	CreatedAt          time.Time                 `json:"created_at"`
 	UpdatedAt          time.Time                 `json:"updated_at"`
@@ -96,11 +96,11 @@ type CreatePurchaseOrderRequest struct {
 }
 
 type CreatePurchaseOrderItemRequest struct {
-	IngredientID       uuid.UUID `json:"ingredient_id"`
+	IngredientID       *uuid.UUID `json:"ingredient_id,omitempty"`
 	PurchaseCategoryID uuid.UUID  `json:"purchase_category_id"`
 	Description        *string    `json:"description,omitempty"`
-	Quantity           float64   `json:"quantity"`
+	Quantity           *float64   `json:"quantity,omitempty"`
-	UnitID             uuid.UUID `json:"unit_id"`
+	UnitID             *uuid.UUID `json:"unit_id,omitempty"`
 	Amount             float64    `json:"amount"`
 }
 

internal/processor/analytics_processor.go

@@ -188,10 +188,10 @@ func (p *AnalyticsProcessorImpl) GetPurchasingAnalytics(ctx context.Context, req
 			Date:                      item.Date,
 			Purchases:                 item.Purchases,
 			RawMaterialPurchases:      item.RawMaterialPurchases,
-			NonInventoryPurchases:     item.NonInventoryPurchases,
+			ExpensePurchases:          item.ExpensePurchases,
 			PurchaseOrders:            item.PurchaseOrders,
 			RawMaterialPurchaseOrders: item.RawMaterialPurchaseOrders,
-			NonInventoryExpenseCount:  item.NonInventoryExpenseCount,
+			ExpenseCount:              item.ExpenseCount,
 			Quantity:                  item.Quantity,
 			Ingredients:               item.Ingredients,
 			Vendors:                   item.Vendors,
@@ -232,10 +232,10 @@ func (p *AnalyticsProcessorImpl) GetPurchasingAnalytics(ctx context.Context, req
 		Summary: models.PurchasingSummary{
 			TotalPurchases:            result.Summary.TotalPurchases,
 			RawMaterialPurchases:      result.Summary.RawMaterialPurchases,
-			NonInventoryPurchases:     result.Summary.NonInventoryPurchases,
+			ExpensePurchases:          result.Summary.ExpensePurchases,
 			TotalPurchaseOrders:       result.Summary.TotalPurchaseOrders,
 			RawMaterialPurchaseOrders: result.Summary.RawMaterialPurchaseOrders,
-			NonInventoryExpenseCount:  result.Summary.NonInventoryExpenseCount,
+			ExpenseCount:              result.Summary.ExpenseCount,
 			TotalQuantity:             result.Summary.TotalQuantity,
 			AveragePurchaseOrderValue: result.Summary.AveragePurchaseOrderValue,
 			TotalIngredients:          result.Summary.TotalIngredients,

internal/processor/analytics_processor_test.go

@@ -77,20 +77,20 @@ func TestAnalyticsProcessorGetPurchasingAnalyticsPassesOutletName(t *testing.T)
 			Summary: entities.PurchasingSummary{
 				TotalPurchases:            300,
 				RawMaterialPurchases:      125,
-				NonInventoryPurchases:     175,
+				ExpensePurchases:          175,
 				TotalPurchaseOrders:       3,
 				RawMaterialPurchaseOrders: 1,
-				NonInventoryExpenseCount:  2,
+				ExpenseCount:              2,
 			},
 			Data: []entities.PurchasingAnalyticsData{
 				{
 					Date:                      now,
 					Purchases:                 300,
 					RawMaterialPurchases:      125,
-					NonInventoryPurchases:     175,
+					ExpensePurchases:          175,
 					PurchaseOrders:            3,
 					RawMaterialPurchaseOrders: 1,
-					NonInventoryExpenseCount:  2,
+					ExpenseCount:              2,
 				},
 			},
 		},
@@ -110,14 +110,14 @@ func TestAnalyticsProcessorGetPurchasingAnalyticsPassesOutletName(t *testing.T)
 	require.Equal(t, outletName, *result.OutletName)
 	require.Equal(t, float64(300), result.Summary.TotalPurchases)
 	require.Equal(t, float64(125), result.Summary.RawMaterialPurchases)
-	require.Equal(t, float64(175), result.Summary.NonInventoryPurchases)
+	require.Equal(t, float64(175), result.Summary.ExpensePurchases)
 	require.Equal(t, int64(3), result.Summary.TotalPurchaseOrders)
 	require.Equal(t, int64(1), result.Summary.RawMaterialPurchaseOrders)
-	require.Equal(t, int64(2), result.Summary.NonInventoryExpenseCount)
+	require.Equal(t, int64(2), result.Summary.ExpenseCount)
 	require.Len(t, result.Data, 1)
 	require.Equal(t, float64(300), result.Data[0].Purchases)
 	require.Equal(t, float64(125), result.Data[0].RawMaterialPurchases)
-	require.Equal(t, float64(175), result.Data[0].NonInventoryPurchases)
+	require.Equal(t, float64(175), result.Data[0].ExpensePurchases)
 }
 
 func TestAnalyticsProcessorGetProfitLossAnalyticsMapsOverviewAndReportFields(t *testing.T) {

internal/processor/expense_processor.go

@@ -61,7 +61,7 @@ func (p *ExpenseProcessorImpl) CreateExpense(ctx context.Context, organizationID
 		if err != nil {
 			return nil, fmt.Errorf("invalid purchase_category_id for item: %w", err)
 		}
-		if err := p.validateNonInventoryPurchaseCategory(ctx, purchaseCategoryID, organizationID); err != nil {
+		if err := p.validateExpensePurchaseCategory(ctx, purchaseCategoryID, organizationID); err != nil {
 			return nil, err
 		}
 
@@ -169,7 +169,7 @@ func (p *ExpenseProcessorImpl) UpdateExpense(ctx context.Context, id, organizati
 			if err != nil {
 				return nil, fmt.Errorf("invalid purchase_category_id for item: %w", err)
 			}
-			if err := p.validateNonInventoryPurchaseCategory(ctx, purchaseCategoryID, organizationID); err != nil {
+			if err := p.validateExpensePurchaseCategory(ctx, purchaseCategoryID, organizationID); err != nil {
 				return nil, err
 			}
 
@@ -334,7 +334,7 @@ func (p *ExpenseProcessorImpl) GetExpenseAnalytics(ctx context.Context, req *mod
 	}, nil
 }
 
-func (p *ExpenseProcessorImpl) validateNonInventoryPurchaseCategory(ctx context.Context, categoryID, organizationID uuid.UUID) error {
+func (p *ExpenseProcessorImpl) validateExpensePurchaseCategory(ctx context.Context, categoryID, organizationID uuid.UUID) error {
 	category, err := p.purchaseCategoryRepo.GetByIDAndOrganizationID(ctx, categoryID, organizationID)
 	if err != nil {
 		return fmt.Errorf("purchase category not found: %w", err)
@@ -344,8 +344,8 @@ func (p *ExpenseProcessorImpl) validateNonInventoryPurchaseCategory(ctx context.
 		return fmt.Errorf("purchase category is inactive")
 	}
 
-	if category.Type != entities.PurchaseCategoryTypeNonInventory {
+	if category.Type != entities.PurchaseCategoryTypeExpense {
-		return fmt.Errorf("purchase category must be non_inventory")
+		return fmt.Errorf("purchase category must be expense")
 	}
 
 	return nil

internal/processor/expense_processor_test.go

@@ -102,7 +102,7 @@ func (*expenseRepositoryCaptureStub) DeleteItemsByExpenseID(context.Context, uui
 func TestExpenseProcessorCreatePersistsItemName(t *testing.T) {
 	repo := &expenseRepositoryCaptureStub{}
 	purchaseCategoryID := uuid.New()
-	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeNonInventory))
+	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeExpense))
 	chartOfAccountID := uuid.New()
 
 	resp, err := p.CreateExpense(context.Background(), uuid.New(), &models.CreateExpenseRequest{
@@ -133,7 +133,7 @@ func TestExpenseProcessorCreatePersistsItemName(t *testing.T) {
 func TestExpenseProcessorCreateDefaultsStatusToDraft(t *testing.T) {
 	repo := &expenseRepositoryCaptureStub{}
 	purchaseCategoryID := uuid.New()
-	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeNonInventory))
+	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeExpense))
 
 	resp, err := p.CreateExpense(context.Background(), uuid.New(), &models.CreateExpenseRequest{
 		Receiver:        "Cashier",
@@ -160,7 +160,7 @@ func TestExpenseProcessorCreateDefaultsStatusToDraft(t *testing.T) {
 func TestExpenseProcessorCreatePersistsProvidedStatus(t *testing.T) {
 	repo := &expenseRepositoryCaptureStub{}
 	purchaseCategoryID := uuid.New()
-	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeNonInventory))
+	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeExpense))
 	status := "approved"
 
 	resp, err := p.CreateExpense(context.Background(), uuid.New(), &models.CreateExpenseRequest{
@@ -209,7 +209,7 @@ func TestExpenseProcessorCreateRejectsRawMaterialPurchaseCategory(t *testing.T)
 
 	require.Error(t, err)
 	require.Nil(t, resp)
-	require.Contains(t, err.Error(), "non_inventory")
+	require.Contains(t, err.Error(), "expense")
 }
 
 func TestExpenseProcessorGetExpenseAnalyticsDefaultsGroupByAndMapsResponse(t *testing.T) {
@@ -241,7 +241,7 @@ func TestExpenseProcessorGetExpenseAnalyticsDefaultsGroupByAndMapsResponse(t *te
 				{
 					PurchaseCategoryID:   purchaseCategoryID,
 					PurchaseCategoryName: "Operational Supplies",
-					PurchaseCategoryType: "non_inventory",
+					PurchaseCategoryType: "expense",
 					TotalAmount:          100000,
 					ExpenseCount:         2,
 					ItemCount:            2,
@@ -266,7 +266,7 @@ func TestExpenseProcessorGetExpenseAnalyticsDefaultsGroupByAndMapsResponse(t *te
 			},
 		},
 	}
-	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeNonInventory))
+	p := NewExpenseProcessorImpl(repo, newExpensePurchaseCategoryRepo(purchaseCategoryID, entities.PurchaseCategoryTypeExpense))
 
 	resp, err := p.GetExpenseAnalytics(context.Background(), &models.ExpenseAnalyticsRequest{
 		OrganizationID: uuid.New(),

internal/processor/purchase_order_processor.go

@@ -67,21 +67,41 @@ func (p *PurchaseOrderProcessorImpl) CreatePurchaseOrder(ctx context.Context, or
 		return nil, fmt.Errorf("purchase order with PO number %s already exists in this organization", req.PONumber)
 	}
 
-	// Validate ingredients, raw-material categories, and units exist
+	// Validate categories and inventory fields per item type.
 	for i, item := range req.Items {
-		_, err := p.ingredientRepo.GetByID(ctx, item.IngredientID, organizationID)
+		category, err := p.validatePurchaseCategory(ctx, item.PurchaseCategoryID, organizationID, i)
+		if err != nil {
+			return nil, err
+		}
+
+		switch category.Type {
+		case entities.PurchaseCategoryTypeRawMaterial:
+			if item.IngredientID == nil {
+				return nil, fmt.Errorf("ingredient_id is required for raw_material item %d", i)
+			}
+			if item.Quantity == nil {
+				return nil, fmt.Errorf("quantity is required for raw_material item %d", i)
+			}
+			if item.UnitID == nil {
+				return nil, fmt.Errorf("unit_id is required for raw_material item %d", i)
+			}
+
+			_, err := p.ingredientRepo.GetByID(ctx, *item.IngredientID, organizationID)
 			if err != nil {
 				return nil, fmt.Errorf("ingredient not found for item %d: %w", i, err)
 			}
 
-		if err := p.validateRawMaterialPurchaseCategory(ctx, item.PurchaseCategoryID, organizationID, i); err != nil {
+			_, err = p.unitRepo.GetByID(ctx, *item.UnitID, organizationID)
-			return nil, err
-		}
-
-		_, err = p.unitRepo.GetByID(ctx, item.UnitID, organizationID)
 			if err != nil {
 				return nil, fmt.Errorf("unit not found for item %d: %w", i, err)
 			}
+		case entities.PurchaseCategoryTypeExpense:
+			if item.IngredientID != nil || item.Quantity != nil || item.UnitID != nil {
+				return nil, fmt.Errorf("ingredient_id, quantity, and unit_id must be empty for expense item %d", i)
+			}
+		default:
+			return nil, fmt.Errorf("purchase category for item %d has unsupported type %s", i, category.Type)
+		}
 	}
 
 	// Calculate total amount
@@ -197,64 +217,58 @@ func (p *PurchaseOrderProcessorImpl) UpdatePurchaseOrder(ctx context.Context, id
 
 	// Update items if provided
 	if req.Items != nil {
-		// Delete existing items
-		err = p.purchaseOrderRepo.DeleteItemsByPurchaseOrderID(ctx, poEntity.ID)
-		if err != nil {
-			return nil, fmt.Errorf("failed to delete existing items: %w", err)
-		}
-
-		// Create new items
 		totalAmount := 0.0
+		items := make([]*entities.PurchaseOrderItem, len(req.Items))
 		for i, itemReq := range req.Items {
-			// Validate ingredients and units exist
+			if itemReq.PurchaseCategoryID == nil {
-			if itemReq.IngredientID != nil {
+				return nil, fmt.Errorf("purchase_category_id is required for item %d", i)
-				_, err := p.ingredientRepo.GetByID(ctx, *itemReq.IngredientID, organizationID)
-				if err != nil {
-					return nil, fmt.Errorf("ingredient not found: %w", err)
-				}
 			}
 
-			if itemReq.UnitID != nil {
+			ingredientID := itemReq.IngredientID
-				_, err := p.unitRepo.GetByID(ctx, *itemReq.UnitID, organizationID)
+			purchaseCategoryID := *itemReq.PurchaseCategoryID
-				if err != nil {
+			unitID := itemReq.UnitID
-					return nil, fmt.Errorf("unit not found: %w", err)
+			quantity := itemReq.Quantity
-				}
+			amount := 0.0
-			}
-
-			if itemReq.PurchaseCategoryID != nil {
-				if err := p.validateRawMaterialPurchaseCategory(ctx, *itemReq.PurchaseCategoryID, organizationID, i); err != nil {
-					return nil, err
-				}
-			}
-
-			// Use existing values if not provided
-			ingredientID := poEntity.Items[0].IngredientID // This is a simplified approach
-			purchaseCategoryID := poEntity.Items[0].PurchaseCategoryID
-			unitID := poEntity.Items[0].UnitID
-			quantity := poEntity.Items[0].Quantity
-			amount := poEntity.Items[0].Amount
-			description := poEntity.Items[0].Description
-
-			if itemReq.IngredientID != nil {
-				ingredientID = *itemReq.IngredientID
-			}
-			if itemReq.UnitID != nil {
-				unitID = *itemReq.UnitID
-			}
-			if itemReq.PurchaseCategoryID != nil {
-				purchaseCategoryID = *itemReq.PurchaseCategoryID
-			}
-			if itemReq.Quantity != nil {
-				quantity = *itemReq.Quantity
-			}
 			if itemReq.Amount != nil {
 				amount = *itemReq.Amount
 			}
-			if itemReq.Description != nil {
+			description := itemReq.Description
-				description = itemReq.Description
+
+			category, err := p.validatePurchaseCategory(ctx, purchaseCategoryID, organizationID, i)
+			if err != nil {
+				return nil, err
 			}
 
-			itemEntity := &entities.PurchaseOrderItem{
+			switch category.Type {
+			case entities.PurchaseCategoryTypeRawMaterial:
+				if ingredientID == nil {
+					return nil, fmt.Errorf("ingredient_id is required for raw_material item %d", i)
+				}
+				if quantity == nil {
+					return nil, fmt.Errorf("quantity is required for raw_material item %d", i)
+				}
+				if unitID == nil {
+					return nil, fmt.Errorf("unit_id is required for raw_material item %d", i)
+				}
+
+				_, err := p.ingredientRepo.GetByID(ctx, *ingredientID, organizationID)
+				if err != nil {
+					return nil, fmt.Errorf("ingredient not found: %w", err)
+				}
+
+				_, err = p.unitRepo.GetByID(ctx, *unitID, organizationID)
+				if err != nil {
+					return nil, fmt.Errorf("unit not found: %w", err)
+				}
+			case entities.PurchaseCategoryTypeExpense:
+				if ingredientID != nil || quantity != nil || unitID != nil {
+					return nil, fmt.Errorf("ingredient_id, quantity, and unit_id must be empty for expense item %d", i)
+				}
+			default:
+				return nil, fmt.Errorf("purchase category for item %d has unsupported type %s", i, category.Type)
+			}
+
+			items[i] = &entities.PurchaseOrderItem{
 				PurchaseOrderID:    poEntity.ID,
 				IngredientID:       ingredientID,
 				PurchaseCategoryID: purchaseCategoryID,
@@ -263,13 +277,20 @@ func (p *PurchaseOrderProcessorImpl) UpdatePurchaseOrder(ctx context.Context, id
 				UnitID:             unitID,
 				Amount:             amount,
 			}
+			totalAmount += amount
+		}
 
+		// Delete and recreate only after all replacement items are valid.
+		err = p.purchaseOrderRepo.DeleteItemsByPurchaseOrderID(ctx, poEntity.ID)
+		if err != nil {
+			return nil, fmt.Errorf("failed to delete existing items: %w", err)
+		}
+
+		for _, itemEntity := range items {
 			err = p.purchaseOrderRepo.CreateItem(ctx, itemEntity)
 			if err != nil {
 				return nil, fmt.Errorf("failed to create purchase order item: %w", err)
 			}
-
-			totalAmount += amount
 		}
 
 		poEntity.TotalAmount = totalAmount
@@ -398,19 +419,27 @@ func (p *PurchaseOrderProcessorImpl) UpdatePurchaseOrderStatus(ctx context.Conte
 
 		// Update inventory for each item
 		for _, item := range poWithItems.Items {
+			if item.PurchaseCategory != nil && item.PurchaseCategory.Type == entities.PurchaseCategoryTypeExpense {
+				continue
+			}
+
+			if item.IngredientID == nil || item.UnitID == nil || item.Quantity == nil {
+				return nil, fmt.Errorf("purchase order item %s is missing raw material inventory fields", item.ID)
+			}
+
 			// Get ingredient to find its base unit
-			ingredient, err := p.ingredientRepo.GetByID(ctx, item.IngredientID, organizationID)
+			ingredient, err := p.ingredientRepo.GetByID(ctx, *item.IngredientID, organizationID)
 			if err != nil {
-				return nil, fmt.Errorf("failed to get ingredient %s: %w", item.IngredientID, err)
+				return nil, fmt.Errorf("failed to get ingredient %s: %w", *item.IngredientID, err)
 			}
 
 			// Convert quantity to ingredient's base unit if needed
-			quantityToAdd := item.Quantity
+			quantityToAdd := *item.Quantity
-			if item.UnitID != ingredient.UnitID {
+			if *item.UnitID != ingredient.UnitID {
 				// Convert from purchase unit to ingredient's base unit
-				convertedQuantity, err := p.unitConverterRepo.ConvertQuantity(ctx, item.IngredientID, item.UnitID, ingredient.UnitID, organizationID, item.Quantity)
+				convertedQuantity, err := p.unitConverterRepo.ConvertQuantity(ctx, *item.IngredientID, *item.UnitID, ingredient.UnitID, organizationID, *item.Quantity)
 				if err != nil {
-					return nil, fmt.Errorf("failed to convert quantity for ingredient %s from unit %s to %s: %w", item.IngredientID, item.UnitID, ingredient.UnitID, err)
+					return nil, fmt.Errorf("failed to convert quantity for ingredient %s from unit %s to %s: %w", *item.IngredientID, *item.UnitID, ingredient.UnitID, err)
 				}
 				quantityToAdd = convertedQuantity
 			}
@@ -428,7 +457,7 @@ func (p *PurchaseOrderProcessorImpl) UpdatePurchaseOrderStatus(ctx context.Conte
 
 			err = p.inventoryMovementService.CreateIngredientMovement(
 				ctx,
-				item.IngredientID,
+				*item.IngredientID,
 				organizationID,
 				outletID,
 				userID,
@@ -441,7 +470,7 @@ func (p *PurchaseOrderProcessorImpl) UpdatePurchaseOrderStatus(ctx context.Conte
 				&item.ID,
 			)
 			if err != nil {
-				return nil, fmt.Errorf("failed to create inventory movement for ingredient %s: %w", item.IngredientID, err)
+				return nil, fmt.Errorf("failed to create inventory movement for ingredient %s: %w", *item.IngredientID, err)
 			}
 		}
 	}
@@ -461,19 +490,19 @@ func (p *PurchaseOrderProcessorImpl) UpdatePurchaseOrderStatus(ctx context.Conte
 	return mappers.PurchaseOrderEntityToResponse(updatedPO), nil
 }
 
-func (p *PurchaseOrderProcessorImpl) validateRawMaterialPurchaseCategory(ctx context.Context, categoryID, organizationID uuid.UUID, itemIndex int) error {
+func (p *PurchaseOrderProcessorImpl) validatePurchaseCategory(ctx context.Context, categoryID, organizationID uuid.UUID, itemIndex int) (*entities.PurchaseCategory, error) {
 	category, err := p.purchaseCategoryRepo.GetByIDAndOrganizationID(ctx, categoryID, organizationID)
 	if err != nil {
-		return fmt.Errorf("purchase category not found for item %d: %w", itemIndex, err)
+		return nil, fmt.Errorf("purchase category not found for item %d: %w", itemIndex, err)
 	}
 
 	if !category.IsActive {
-		return fmt.Errorf("purchase category for item %d is inactive", itemIndex)
+		return nil, fmt.Errorf("purchase category for item %d is inactive", itemIndex)
 	}
 
-	if category.Type != entities.PurchaseCategoryTypeRawMaterial {
+	if category.Type != entities.PurchaseCategoryTypeRawMaterial && category.Type != entities.PurchaseCategoryTypeExpense {
-		return fmt.Errorf("purchase category for item %d must be raw_material", itemIndex)
+		return nil, fmt.Errorf("purchase category for item %d must be raw_material or expense", itemIndex)
 	}
 
-	return nil
+	return category, nil
 }

internal/repository/analytics_repository.go

@@ -146,7 +146,7 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 	}
 
 	rawMaterialOutletFilter := ""
-	nonInventoryOutletFilter := ""
+	expenseOutletFilter := ""
 	rawMaterialSummaryArgs := []interface{}{
 		organizationID,
 		entities.InventoryMovementTypePurchase,
@@ -155,20 +155,20 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 		dateFrom,
 		dateTo,
 	}
-	nonInventorySummaryArgs := []interface{}{
+	expenseSummaryArgs := []interface{}{
 		organizationID,
-		entities.PurchaseCategoryTypeNonInventory,
+		entities.PurchaseCategoryTypeExpense,
 		"approved",
 		dateFrom,
 		dateTo,
 	}
 	if outletID != nil {
 		rawMaterialOutletFilter = "AND im.outlet_id = ?"
-		nonInventoryOutletFilter = "AND e.outlet_id = ?"
+		expenseOutletFilter = "AND e.outlet_id = ?"
 		rawMaterialSummaryArgs = append(rawMaterialSummaryArgs, *outletID)
-		nonInventorySummaryArgs = append(nonInventorySummaryArgs, *outletID)
+		expenseSummaryArgs = append(expenseSummaryArgs, *outletID)
 	}
-	summaryArgs := append(rawMaterialSummaryArgs, nonInventorySummaryArgs...)
+	summaryArgs := append(rawMaterialSummaryArgs, expenseSummaryArgs...)
 
 	summaryQuery := `
 		WITH raw_material AS (
@@ -187,10 +187,10 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 			  AND im.created_at >= ? AND im.created_at <= ?
 			  ` + rawMaterialOutletFilter + `
 		),
-		non_inventory AS (
+		expense AS (
 			SELECT
-				COALESCE(SUM(ei.amount), 0) as non_inventory_purchases,
+				COALESCE(SUM(ei.amount), 0) as expense_purchases,
-				COUNT(DISTINCT e.id) as non_inventory_expense_count
+				COUNT(DISTINCT e.id) as expense_count
 			FROM expense_items ei
 			JOIN expenses e ON ei.expense_id = e.id
 			JOIN purchase_categories pc ON ei.purchase_category_id = pc.id
@@ -198,25 +198,25 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 			  AND pc.type = ?
 			  AND e.status = ?
 			  AND e.transaction_date >= ? AND e.transaction_date <= ?
-			  ` + nonInventoryOutletFilter + `
+			  ` + expenseOutletFilter + `
 		)
 		SELECT
-			rm.raw_material_purchases + ni.non_inventory_purchases as total_purchases,
+			rm.raw_material_purchases + ex.expense_purchases as total_purchases,
 			rm.raw_material_purchases,
-			ni.non_inventory_purchases,
+			ex.expense_purchases,
-			rm.raw_material_purchase_orders + ni.non_inventory_expense_count as total_purchase_orders,
+			rm.raw_material_purchase_orders + ex.expense_count as total_purchase_orders,
 			rm.raw_material_purchase_orders,
-			ni.non_inventory_expense_count,
+			ex.expense_count,
 			rm.total_quantity,
 			CASE
-				WHEN rm.raw_material_purchase_orders + ni.non_inventory_expense_count > 0
+				WHEN rm.raw_material_purchase_orders + ex.expense_count > 0
-				THEN (rm.raw_material_purchases + ni.non_inventory_purchases) / (rm.raw_material_purchase_orders + ni.non_inventory_expense_count)
+				THEN (rm.raw_material_purchases + ex.expense_purchases) / (rm.raw_material_purchase_orders + ex.expense_count)
 				ELSE 0
 			END as average_purchase_order_value,
 			rm.total_ingredients,
 			rm.total_vendors
 		FROM raw_material rm
-		CROSS JOIN non_inventory ni
+		CROSS JOIN expense ex
 	`
 
 	if err := r.db.WithContext(ctx).Raw(summaryQuery, summaryArgs...).Scan(&summary).Error; err != nil {
@@ -235,14 +235,14 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 		dateFormat = "DATE_TRUNC('day', im.created_at)::timestamp"
 	}
 
-	nonInventoryDateFormat := "DATE_TRUNC('day', e.transaction_date)::timestamp"
+	expenseDateFormat := "DATE_TRUNC('day', e.transaction_date)::timestamp"
 	switch groupBy {
 	case "hour":
-		nonInventoryDateFormat = "DATE_TRUNC('hour', e.transaction_date)::timestamp"
+		expenseDateFormat = "DATE_TRUNC('hour', e.transaction_date)::timestamp"
 	case "week":
-		nonInventoryDateFormat = "DATE_TRUNC('week', e.transaction_date)::timestamp"
+		expenseDateFormat = "DATE_TRUNC('week', e.transaction_date)::timestamp"
 	case "month":
-		nonInventoryDateFormat = "DATE_TRUNC('month', e.transaction_date)::timestamp"
+		expenseDateFormat = "DATE_TRUNC('month', e.transaction_date)::timestamp"
 	}
 
 	rawMaterialDataArgs := []interface{}{
@@ -253,18 +253,18 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 		dateFrom,
 		dateTo,
 	}
-	nonInventoryDataArgs := []interface{}{
+	expenseDataArgs := []interface{}{
 		organizationID,
-		entities.PurchaseCategoryTypeNonInventory,
+		entities.PurchaseCategoryTypeExpense,
 		"approved",
 		dateFrom,
 		dateTo,
 	}
 	if outletID != nil {
 		rawMaterialDataArgs = append(rawMaterialDataArgs, *outletID)
-		nonInventoryDataArgs = append(nonInventoryDataArgs, *outletID)
+		expenseDataArgs = append(expenseDataArgs, *outletID)
 	}
-	dataArgs := append(rawMaterialDataArgs, nonInventoryDataArgs...)
+	dataArgs := append(rawMaterialDataArgs, expenseDataArgs...)
 
 	var data []entities.PurchasingAnalyticsData
 	dataQuery := `
@@ -286,11 +286,11 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 			  ` + rawMaterialOutletFilter + `
 			GROUP BY 1
 		),
-		non_inventory AS (
+		expense AS (
 			SELECT
-				` + nonInventoryDateFormat + ` as date,
+				` + expenseDateFormat + ` as date,
-				COALESCE(SUM(ei.amount), 0) as non_inventory_purchases,
+				COALESCE(SUM(ei.amount), 0) as expense_purchases,
-				COUNT(DISTINCT e.id) as non_inventory_expense_count
+				COUNT(DISTINCT e.id) as expense_count
 			FROM expense_items ei
 			JOIN expenses e ON ei.expense_id = e.id
 			JOIN purchase_categories pc ON ei.purchase_category_id = pc.id
@@ -298,22 +298,22 @@ func (r *AnalyticsRepositoryImpl) GetPurchasingAnalytics(ctx context.Context, or
 			  AND pc.type = ?
 			  AND e.status = ?
 			  AND e.transaction_date >= ? AND e.transaction_date <= ?
-			  ` + nonInventoryOutletFilter + `
+			  ` + expenseOutletFilter + `
 			GROUP BY 1
 		)
 		SELECT
-			COALESCE(rm.date, ni.date) as date,
+			COALESCE(rm.date, ex.date) as date,
-			COALESCE(rm.raw_material_purchases, 0) + COALESCE(ni.non_inventory_purchases, 0) as purchases,
+			COALESCE(rm.raw_material_purchases, 0) + COALESCE(ex.expense_purchases, 0) as purchases,
 			COALESCE(rm.raw_material_purchases, 0) as raw_material_purchases,
-			COALESCE(ni.non_inventory_purchases, 0) as non_inventory_purchases,
+			COALESCE(ex.expense_purchases, 0) as expense_purchases,
-			COALESCE(rm.raw_material_purchase_orders, 0) + COALESCE(ni.non_inventory_expense_count, 0) as purchase_orders,
+			COALESCE(rm.raw_material_purchase_orders, 0) + COALESCE(ex.expense_count, 0) as purchase_orders,
 			COALESCE(rm.raw_material_purchase_orders, 0) as raw_material_purchase_orders,
-			COALESCE(ni.non_inventory_expense_count, 0) as non_inventory_expense_count,
+			COALESCE(ex.expense_count, 0) as expense_count,
 			COALESCE(rm.quantity, 0) as quantity,
 			COALESCE(rm.ingredients, 0) as ingredients,
 			COALESCE(rm.vendors, 0) as vendors
 		FROM raw_material rm
-		FULL OUTER JOIN non_inventory ni ON rm.date = ni.date
+		FULL OUTER JOIN expense ex ON rm.date = ex.date
 		ORDER BY date
 	`
 

internal/repository/expense_repository.go

@@ -207,7 +207,7 @@ func (r *ExpenseRepositoryImpl) GetAnalytics(ctx context.Context, organizationID
 		Joins("JOIN expenses e ON ei.expense_id = e.id").
 		Joins("JOIN purchase_categories pc ON ei.purchase_category_id = pc.id").
 		Where("e.organization_id = ?", organizationID).
-		Where("pc.type = ?", entities.PurchaseCategoryTypeNonInventory).
+		Where("pc.type = ?", entities.PurchaseCategoryTypeExpense).
 		Where("e.status = ?", "approved").
 		Where("e.transaction_date >= ? AND e.transaction_date <= ?", dateFrom, dateTo).
 		Group("pc.id, pc.name, pc.type").

internal/transformer/analytics_transformer.go

@@ -172,10 +172,10 @@ func PurchasingAnalyticsModelToContract(resp *models.PurchasingAnalyticsResponse
 			Date:                      item.Date,
 			Purchases:                 item.Purchases,
 			RawMaterialPurchases:      item.RawMaterialPurchases,
-			NonInventoryPurchases:     item.NonInventoryPurchases,
+			ExpensePurchases:          item.ExpensePurchases,
 			PurchaseOrders:            item.PurchaseOrders,
 			RawMaterialPurchaseOrders: item.RawMaterialPurchaseOrders,
-			NonInventoryExpenseCount:  item.NonInventoryExpenseCount,
+			ExpenseCount:              item.ExpenseCount,
 			Quantity:                  item.Quantity,
 			Ingredients:               item.Ingredients,
 			Vendors:                   item.Vendors,
@@ -216,10 +216,10 @@ func PurchasingAnalyticsModelToContract(resp *models.PurchasingAnalyticsResponse
 		Summary: contract.PurchasingSummary{
 			TotalPurchases:            resp.Summary.TotalPurchases,
 			RawMaterialPurchases:      resp.Summary.RawMaterialPurchases,
-			NonInventoryPurchases:     resp.Summary.NonInventoryPurchases,
+			ExpensePurchases:          resp.Summary.ExpensePurchases,
 			TotalPurchaseOrders:       resp.Summary.TotalPurchaseOrders,
 			RawMaterialPurchaseOrders: resp.Summary.RawMaterialPurchaseOrders,
-			NonInventoryExpenseCount:  resp.Summary.NonInventoryExpenseCount,
+			ExpenseCount:              resp.Summary.ExpenseCount,
 			TotalQuantity:             resp.Summary.TotalQuantity,
 			AveragePurchaseOrderValue: resp.Summary.AveragePurchaseOrderValue,
 			TotalIngredients:          resp.Summary.TotalIngredients,

internal/transformer/analytics_transformer_test.go

@@ -61,20 +61,20 @@ func TestPurchasingAnalyticsModelToContractCopiesOutletName(t *testing.T) {
 		Summary: models.PurchasingSummary{
 			TotalPurchases:            300,
 			RawMaterialPurchases:      125,
-			NonInventoryPurchases:     175,
+			ExpensePurchases:          175,
 			TotalPurchaseOrders:       3,
 			RawMaterialPurchaseOrders: 1,
-			NonInventoryExpenseCount:  2,
+			ExpenseCount:              2,
 		},
 		Data: []models.PurchasingAnalyticsData{
 			{
 				Date:                      now,
 				Purchases:                 300,
 				RawMaterialPurchases:      125,
-				NonInventoryPurchases:     175,
+				ExpensePurchases:          175,
 				PurchaseOrders:            3,
 				RawMaterialPurchaseOrders: 1,
-				NonInventoryExpenseCount:  2,
+				ExpenseCount:              2,
 			},
 		},
 	})
@@ -85,14 +85,14 @@ func TestPurchasingAnalyticsModelToContractCopiesOutletName(t *testing.T) {
 	require.Equal(t, outletName, *result.OutletName)
 	require.Equal(t, float64(300), result.Summary.TotalPurchases)
 	require.Equal(t, float64(125), result.Summary.RawMaterialPurchases)
-	require.Equal(t, float64(175), result.Summary.NonInventoryPurchases)
+	require.Equal(t, float64(175), result.Summary.ExpensePurchases)
 	require.Equal(t, int64(3), result.Summary.TotalPurchaseOrders)
 	require.Equal(t, int64(1), result.Summary.RawMaterialPurchaseOrders)
-	require.Equal(t, int64(2), result.Summary.NonInventoryExpenseCount)
+	require.Equal(t, int64(2), result.Summary.ExpenseCount)
 	require.Len(t, result.Data, 1)
 	require.Equal(t, float64(300), result.Data[0].Purchases)
 	require.Equal(t, float64(125), result.Data[0].RawMaterialPurchases)
-	require.Equal(t, float64(175), result.Data[0].NonInventoryPurchases)
+	require.Equal(t, float64(175), result.Data[0].ExpensePurchases)
 }
 
 func TestPurchasingAnalyticsModelToContractOmitsNilOutletName(t *testing.T) {

internal/transformer/purchase_order_transformer_test.go

@@ -12,15 +12,19 @@ import (
 )
 
 func TestCreatePurchaseOrderRequestToModelAllowsMissingDueDate(t *testing.T) {
+	ingredientID := uuid.New()
+	quantity := 1.0
+	unitID := uuid.New()
+
 	result, err := CreatePurchaseOrderRequestToModel(&contract.CreatePurchaseOrderRequest{
 		VendorID:        uuid.New(),
 		PONumber:        "PO-001",
 		TransactionDate: "2026-05-29",
 		Items: []contract.CreatePurchaseOrderItemRequest{
 			{
-				IngredientID: uuid.New(),
+				IngredientID: &ingredientID,
-				Quantity:     1,
+				Quantity:     &quantity,
-				UnitID:       uuid.New(),
+				UnitID:       &unitID,
 				Amount:       1000,
 			},
 		},

internal/validator/purchase_category_validator.go

@@ -34,7 +34,7 @@ func (v *PurchaseCategoryValidatorImpl) ValidateCreatePurchaseCategoryRequest(re
 	}
 
 	if !isValidPurchaseCategoryType(req.Type) {
-		return errors.New("type must be raw_material or non_inventory"), constants.MalformedFieldErrorCode
+		return errors.New("type must be raw_material or expense"), constants.MalformedFieldErrorCode
 	}
 
 	if req.Code != nil && len(strings.TrimSpace(*req.Code)) > 100 {
@@ -63,7 +63,7 @@ func (v *PurchaseCategoryValidatorImpl) ValidateUpdatePurchaseCategoryRequest(re
 	}
 
 	if req.Type != nil && !isValidPurchaseCategoryType(*req.Type) {
-		return errors.New("type must be raw_material or non_inventory"), constants.MalformedFieldErrorCode
+		return errors.New("type must be raw_material or expense"), constants.MalformedFieldErrorCode
 	}
 
 	if req.Code != nil && len(strings.TrimSpace(*req.Code)) > 100 {
@@ -87,7 +87,7 @@ func (v *PurchaseCategoryValidatorImpl) ValidateListPurchaseCategoriesRequest(re
 	}
 
 	if req.Type != "" && !isValidPurchaseCategoryType(req.Type) {
-		return errors.New("type must be raw_material or non_inventory"), constants.MalformedFieldErrorCode
+		return errors.New("type must be raw_material or expense"), constants.MalformedFieldErrorCode
 	}
 
 	return nil, ""
@@ -95,7 +95,7 @@ func (v *PurchaseCategoryValidatorImpl) ValidateListPurchaseCategoriesRequest(re
 
 func isValidPurchaseCategoryType(categoryType string) bool {
 	switch categoryType {
-	case "raw_material", "non_inventory":
+	case "raw_material", "expense":
 		return true
 	default:
 		return false

internal/validator/purchase_order_validator.go

@@ -181,20 +181,20 @@ func (v *PurchaseOrderValidatorImpl) ValidateListPurchaseOrdersRequest(req *cont
 }
 
 func (v *PurchaseOrderValidatorImpl) validatePurchaseOrderItem(item *contract.CreatePurchaseOrderItemRequest, index int) (error, string) {
-	if item.IngredientID == uuid.Nil {
-		return errors.New("items[" + strconv.Itoa(index) + "].ingredient_id is required"), constants.MissingFieldErrorCode
-	}
-
 	if item.PurchaseCategoryID == uuid.Nil {
 		return errors.New("items[" + strconv.Itoa(index) + "].purchase_category_id is required"), constants.MissingFieldErrorCode
 	}
 
-	if item.Quantity <= 0 {
+	if item.IngredientID != nil && *item.IngredientID == uuid.Nil {
+		return errors.New("items[" + strconv.Itoa(index) + "].ingredient_id cannot be empty"), constants.MalformedFieldErrorCode
+	}
+
+	if item.Quantity != nil && *item.Quantity <= 0 {
 		return errors.New("items[" + strconv.Itoa(index) + "].quantity must be greater than 0"), constants.MalformedFieldErrorCode
 	}
 
-	if item.UnitID == uuid.Nil {
+	if item.UnitID != nil && *item.UnitID == uuid.Nil {
-		return errors.New("items[" + strconv.Itoa(index) + "].unit_id is required"), constants.MissingFieldErrorCode
+		return errors.New("items[" + strconv.Itoa(index) + "].unit_id cannot be empty"), constants.MalformedFieldErrorCode
 	}
 
 	if item.Amount < 0 {
@@ -209,6 +209,14 @@ func (v *PurchaseOrderValidatorImpl) validateUpdatePurchaseOrderItem(item *contr
 		return errors.New("items[" + strconv.Itoa(index) + "].purchase_category_id is required"), constants.MissingFieldErrorCode
 	}
 
+	if item.IngredientID != nil && *item.IngredientID == uuid.Nil {
+		return errors.New("items[" + strconv.Itoa(index) + "].ingredient_id cannot be empty"), constants.MalformedFieldErrorCode
+	}
+
+	if item.UnitID != nil && *item.UnitID == uuid.Nil {
+		return errors.New("items[" + strconv.Itoa(index) + "].unit_id cannot be empty"), constants.MalformedFieldErrorCode
+	}
+
 	if item.Quantity != nil && *item.Quantity <= 0 {
 		return errors.New("items[" + strconv.Itoa(index) + "].quantity must be greater than 0"), constants.MalformedFieldErrorCode
 	}

internal/validator/purchase_order_validator_test.go

@@ -11,16 +11,20 @@ import (
 )
 
 func validCreatePurchaseOrderRequest() *contract.CreatePurchaseOrderRequest {
+	ingredientID := uuid.New()
+	quantity := 1.0
+	unitID := uuid.New()
+
 	return &contract.CreatePurchaseOrderRequest{
 		VendorID:        uuid.New(),
 		PONumber:        "PO-001",
 		TransactionDate: "2026-05-29",
 		Items: []contract.CreatePurchaseOrderItemRequest{
 			{
-				IngredientID:       uuid.New(),
+				IngredientID:       &ingredientID,
 				PurchaseCategoryID: uuid.New(),
-				Quantity:           1,
+				Quantity:           &quantity,
-				UnitID:             uuid.New(),
+				UnitID:             &unitID,
 				Amount:             1000,
 			},
 		},

migrations/000075_create_purchase_categories.up.sql

@@ -3,7 +3,7 @@ CREATE TABLE purchase_category_presets (
     parent_id UUID REFERENCES purchase_category_presets(id) ON DELETE SET NULL,
     code VARCHAR(100) NOT NULL UNIQUE,
     name VARCHAR(255) NOT NULL,
-    type VARCHAR(20) NOT NULL CHECK (type IN ('raw_material', 'non_inventory')),
+    type VARCHAR(20) NOT NULL CHECK (type IN ('raw_material', 'expense')),
     sort_order INTEGER NOT NULL DEFAULT 0,
     is_active BOOLEAN NOT NULL DEFAULT true,
     created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
@@ -17,7 +17,7 @@ CREATE TABLE purchase_categories (
     parent_id UUID REFERENCES purchase_categories(id) ON DELETE SET NULL,
     code VARCHAR(100) NOT NULL,
     name VARCHAR(255) NOT NULL,
-    type VARCHAR(20) NOT NULL CHECK (type IN ('raw_material', 'non_inventory')),
+    type VARCHAR(20) NOT NULL CHECK (type IN ('raw_material', 'expense')),
     sort_order INTEGER NOT NULL DEFAULT 0,
     is_system BOOLEAN NOT NULL DEFAULT false,
     is_active BOOLEAN NOT NULL DEFAULT true,
@@ -38,8 +38,8 @@ CREATE INDEX idx_purchase_categories_is_active ON purchase_categories(is_active)
 
 INSERT INTO purchase_category_presets (code, name, type, sort_order)
 VALUES
-    ('hpp', 'HPP', 'raw_material', 1),
+    ('bahan_baku', 'Bahan Baku', 'raw_material', 1),
-    ('biaya_lain_lain', 'Biaya Lain-lain', 'non_inventory', 2)
+    ('biaya_lain_lain', 'Biaya Lain-lain', 'expense', 2)
 ON CONFLICT (code) DO NOTHING;
 
 INSERT INTO purchase_category_presets (parent_id, code, name, type, sort_order)
@@ -47,18 +47,14 @@ SELECT parent.id, child.code, child.name, child.type, child.sort_order
 FROM purchase_category_presets parent
 JOIN (
     VALUES
-        ('hpp', 'hpp_bakso_mie_ayam', 'Bakso & Mie Ayam', 'raw_material', 1),
+        ('biaya_lain_lain', 'biaya_atk_perlengkapan', 'ATK & Perlengkapan', 'expense', 1),
-        ('hpp', 'hpp_nusantara', 'Nusantara', 'raw_material', 2),
+        ('biaya_lain_lain', 'biaya_makan_karyawan', 'Makan Karyawan', 'expense', 2),
-        ('hpp', 'hpp_ramen', 'Ramen', 'raw_material', 3),
+        ('biaya_lain_lain', 'biaya_bensin_parkir', 'Bensin & Parkir', 'expense', 3),
-        ('hpp', 'hpp_minuman_kopi', 'Minuman/Kopi', 'raw_material', 4),
+        ('biaya_lain_lain', 'biaya_kebersihan_keamanan', 'Kebersihan & Keamanan', 'expense', 4),
-        ('biaya_lain_lain', 'biaya_atk_perlengkapan', 'ATK & Perlengkapan', 'non_inventory', 1),
+        ('biaya_lain_lain', 'biaya_gaji_dw', 'Gaji DW', 'expense', 5),
-        ('biaya_lain_lain', 'biaya_makan_karyawan', 'Makan Karyawan', 'non_inventory', 2),
+        ('biaya_lain_lain', 'biaya_gaji_staff', 'Gaji Staff', 'expense', 6),
-        ('biaya_lain_lain', 'biaya_bensin_parkir', 'Bensin & Parkir', 'non_inventory', 3),
+        ('biaya_lain_lain', 'biaya_internet_server', 'Internet & Server', 'expense', 7),
-        ('biaya_lain_lain', 'biaya_kebersihan_keamanan', 'Kebersihan & Keamanan', 'non_inventory', 4),
+        ('biaya_lain_lain', 'biaya_air_listrik', 'Air & Listrik', 'expense', 8),
-        ('biaya_lain_lain', 'biaya_gaji_dw', 'Gaji DW', 'non_inventory', 5),
+        ('biaya_lain_lain', 'biaya_promosi', 'Promosi', 'expense', 9)
-        ('biaya_lain_lain', 'biaya_gaji_staff', 'Gaji Staff', 'non_inventory', 6),
-        ('biaya_lain_lain', 'biaya_internet_server', 'Internet & Server', 'non_inventory', 7),
-        ('biaya_lain_lain', 'biaya_air_listrik', 'Air & Listrik', 'non_inventory', 8),
-        ('biaya_lain_lain', 'biaya_promosi', 'Promosi', 'non_inventory', 9)
 ) AS child(parent_code, code, name, type, sort_order) ON parent.code = child.parent_code
 ON CONFLICT (code) DO NOTHING;

migrations/000080_rename_non_inventory_purchase_categories.down.sql

@@ -0,0 +1,32 @@
+ALTER TABLE purchase_category_presets DROP CONSTRAINT IF EXISTS purchase_category_presets_type_check;
+ALTER TABLE purchase_categories DROP CONSTRAINT IF EXISTS purchase_categories_type_check;
+
+UPDATE purchase_category_presets
+SET type = 'non_inventory'
+WHERE type = 'expense';
+
+UPDATE purchase_categories
+SET type = 'non_inventory'
+WHERE type = 'expense';
+
+UPDATE purchase_category_presets
+SET code = 'hpp', name = 'HPP'
+WHERE code = 'bahan_baku' AND type = 'raw_material';
+
+UPDATE purchase_categories
+SET code = 'hpp', name = 'HPP'
+WHERE code = 'bahan_baku' AND type = 'raw_material';
+
+UPDATE purchase_category_presets
+SET is_active = true
+WHERE code LIKE 'hpp\_%' ESCAPE '\' AND type = 'raw_material';
+
+UPDATE purchase_categories
+SET is_active = true
+WHERE code LIKE 'hpp\_%' ESCAPE '\' AND type = 'raw_material';
+
+ALTER TABLE purchase_category_presets
+ADD CONSTRAINT purchase_category_presets_type_check CHECK (type IN ('raw_material', 'non_inventory'));
+
+ALTER TABLE purchase_categories
+ADD CONSTRAINT purchase_categories_type_check CHECK (type IN ('raw_material', 'non_inventory'));

migrations/000080_rename_non_inventory_purchase_categories.up.sql

@@ -0,0 +1,36 @@
+ALTER TABLE purchase_category_presets DROP CONSTRAINT IF EXISTS purchase_category_presets_type_check;
+ALTER TABLE purchase_categories DROP CONSTRAINT IF EXISTS purchase_categories_type_check;
+
+UPDATE purchase_category_presets
+SET type = 'expense'
+WHERE type = 'non_inventory';
+
+UPDATE purchase_categories
+SET type = 'expense'
+WHERE type = 'non_inventory';
+
+UPDATE purchase_category_presets
+SET code = 'bahan_baku', name = 'Bahan Baku'
+WHERE code = 'hpp' AND type = 'raw_material';
+
+UPDATE purchase_categories
+SET code = 'bahan_baku', name = 'Bahan Baku'
+WHERE code = 'hpp' AND type = 'raw_material';
+
+UPDATE purchase_category_presets
+SET is_active = false
+WHERE code LIKE 'hpp\_%' ESCAPE '\' AND type = 'raw_material';
+
+UPDATE purchase_categories
+SET is_active = false
+WHERE code LIKE 'hpp\_%' ESCAPE '\' AND type = 'raw_material';
+
+ALTER TABLE purchase_category_presets
+ADD CONSTRAINT purchase_category_presets_type_check CHECK (type IN ('raw_material', 'expense'));
+
+ALTER TABLE purchase_categories
+ADD CONSTRAINT purchase_categories_type_check CHECK (type IN ('raw_material', 'expense'));
+
+ALTER TABLE purchase_order_items ALTER COLUMN ingredient_id DROP NOT NULL;
+ALTER TABLE purchase_order_items ALTER COLUMN quantity DROP NOT NULL;
+ALTER TABLE purchase_order_items ALTER COLUMN unit_id DROP NOT NULL;