feat/BE/US-278/TASK-288,289-adjust schema database,Create trigger in expense module, add filter in warehouse linked to project flock

internal/database/migrations/20251204193903_adjustment_purchase_expedition.down.sql

@@ -6,12 +6,20 @@ BEGIN
         ALTER TABLE purchase_items
             DROP CONSTRAINT fk_purchase_items_expense_nonstock;
     END IF;
+    IF EXISTS (
+        SELECT 1 FROM pg_constraint WHERE conname = 'fk_purchase_items_project_flock_kandang'
+    ) THEN
+        ALTER TABLE purchase_items
+            DROP CONSTRAINT fk_purchase_items_project_flock_kandang;
+    END IF;
 END $$;
 
 DROP INDEX IF EXISTS idx_purchase_items_expense_nonstock_id;
+DROP INDEX IF EXISTS idx_purchase_items_project_flock_kandang_id;
 
 ALTER TABLE purchase_items
     DROP COLUMN IF EXISTS expense_nonstock_id,
+    DROP COLUMN IF EXISTS project_flock_kandang_id,
     ALTER COLUMN vehicle_number DROP NOT NULL,
     ALTER COLUMN vehicle_number TYPE VARCHAR USING vehicle_number;
 
@@ -27,4 +35,4 @@ ALTER TABLE purchases
 
 ALTER TABLE purchases
     ALTER COLUMN credit_term DROP DEFAULT,
-    ALTER COLUMN grand_total DROP DEFAULT;
+    ALTER COLUMN grand_total DROP DEFAULT;

internal/database/migrations/20251204193903_adjustment_purchase_expedition.up.sql

@@ -11,7 +11,8 @@ ALTER TABLE purchases
 
 -- Bring purchase_items in line with new requirements
 ALTER TABLE purchase_items
-    ADD COLUMN IF NOT EXISTS expense_nonstock_id BIGINT;
+    ADD COLUMN IF NOT EXISTS expense_nonstock_id BIGINT,
+    ADD COLUMN IF NOT EXISTS project_flock_kandang_id BIGINT;
 
 UPDATE purchase_items
 SET vehicle_number = ''
@@ -35,7 +36,22 @@ BEGIN
              ON DELETE SET NULL ON UPDATE CASCADE';
         END IF;
     END IF;
+
+    IF EXISTS (SELECT 1 FROM pg_tables WHERE tablename = 'project_flock_kandangs') THEN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_constraint WHERE conname = 'fk_purchase_items_project_flock_kandang'
+        ) THEN
+            EXECUTE
+            'ALTER TABLE purchase_items
+             ADD CONSTRAINT fk_purchase_items_project_flock_kandang
+             FOREIGN KEY (project_flock_kandang_id)
+             REFERENCES project_flock_kandangs(id)
+             ON DELETE SET NULL ON UPDATE CASCADE';
+        END IF;
+    END IF;
 END $$;
 
 CREATE INDEX IF NOT EXISTS idx_purchase_items_expense_nonstock_id
-    ON purchase_items (expense_nonstock_id);
+    ON purchase_items (expense_nonstock_id);
+CREATE INDEX IF NOT EXISTS idx_purchase_items_project_flock_kandang_id
+    ON purchase_items (project_flock_kandang_id);

internal/entities/purchase_item.go

@@ -5,21 +5,22 @@ import (
 )
 
 type PurchaseItem struct {
-	Id                 uint `gorm:"primaryKey;autoIncrement"`
-	PurchaseId         uint `gorm:"not null"`
-	ProductId          uint `gorm:"not null"`
-	WarehouseId        uint `gorm:"not null"`
-	ProductWarehouseId *uint
-	ReceivedDate       *time.Time
-	TravelNumber       *string
-	TravelNumberDocs   *string
-	VehicleNumber      *string
-	SubQty             float64 `gorm:"type:numeric(15,3);not null"`
-	TotalQty           float64 `gorm:"type:numeric(15,3);default:0"`
-	TotalUsed          float64 `gorm:"type:numeric(15,3);default:0"`
-	Price              float64 `gorm:"type:numeric(15,3);default:0"`
-	TotalPrice         float64 `gorm:"type:numeric(15,3);default:0"`
-	ExpenseNonstockId  *uint64
+	Id                    uint `gorm:"primaryKey;autoIncrement"`
+	PurchaseId            uint `gorm:"not null"`
+	ProductId             uint `gorm:"not null"`
+	WarehouseId           uint `gorm:"not null"`
+	ProductWarehouseId    *uint
+	ProjectFlockKandangId *uint
+	ReceivedDate          *time.Time
+	TravelNumber          *string
+	TravelNumberDocs      *string
+	VehicleNumber         *string
+	SubQty                float64 `gorm:"type:numeric(15,3);not null"`
+	TotalQty              float64 `gorm:"type:numeric(15,3);default:0"`
+	TotalUsed             float64 `gorm:"type:numeric(15,3);default:0"`
+	Price                 float64 `gorm:"type:numeric(15,3);default:0"`
+	TotalPrice            float64 `gorm:"type:numeric(15,3);default:0"`
+	ExpenseNonstockId     *uint64
 
 	// Relations
 	Purchase         *Purchase         `gorm:"foreignKey:PurchaseId;references:Id"`

internal/modules/master/warehouses/controllers/warehouse.controller.go

@@ -24,10 +24,11 @@ func NewWarehouseController(warehouseService service.WarehouseService) *Warehous
 
 func (u *WarehouseController) GetAll(c *fiber.Ctx) error {
 	query := &validation.Query{
-		Page:   c.QueryInt("page", 1),
-		Limit:  c.QueryInt("limit", 10),
-		Search: c.Query("search", ""),
-		AreaId: c.QueryInt("area_id", 0),
+		Page:                   c.QueryInt("page", 1),
+		Limit:                  c.QueryInt("limit", 10),
+		Search:                 c.Query("search", ""),
+		AreaId:                 c.QueryInt("area_id", 0),
+		ActiveProjectFlockOnly: c.QueryBool("active_project_flock", false),
 	}
 
 	if query.Page < 1 || query.Limit < 1 {

internal/modules/master/warehouses/services/warehouse.service.go

@@ -53,11 +53,28 @@ func (s warehouseService) GetAll(c *fiber.Ctx, params *validation.Query) ([]enti
 	warehouses, total, err := s.Repository.GetAll(c.Context(), offset, params.Limit, func(db *gorm.DB) *gorm.DB {
 		db = s.withRelations(db)
 		if params.Search != "" {
-			return db.Where("name LIKE ?", "%"+params.Search+"%")
+			db = db.Where("warehouses.name LIKE ?", "%"+params.Search+"%")
 		}
 		if params.AreaId != 0 {
 			db = db.Where("area_id = ?", params.AreaId)
 		}
+		if params.ActiveProjectFlockOnly {
+			db = db.Where(`
+				EXISTS (
+					SELECT 1
+					FROM kandangs k
+					JOIN project_flock_kandangs pfk ON pfk.kandang_id = k.id
+					JOIN (
+						SELECT DISTINCT ON (approvable_id) approvable_id, step_name, action_at
+						FROM approvals
+						WHERE approvable_type = 'PROJECT_FLOCKS'
+						ORDER BY approvable_id, action_at DESC
+					) latest_approval ON latest_approval.approvable_id = pfk.project_flock_id
+					WHERE k.id = warehouses.kandang_id
+						AND LOWER(latest_approval.step_name) = LOWER(?)
+				)
+			`, "Aktif")
+		}
 		return db.Order("created_at DESC").Order("updated_at DESC")
 	})
 

internal/modules/master/warehouses/validations/warehouse.validation.go

@@ -17,8 +17,9 @@ type Update struct {
 }
 
 type Query struct {
-	Page   int    `query:"page" validate:"omitempty,number,min=1"`
-	Limit  int    `query:"limit" validate:"omitempty,number,min=1,max=100"`
-	Search string `query:"search" validate:"omitempty,max=50"`
-	AreaId int    `query:"area_id" validate:"omitempty,number,gt=0"`
+	Page                   int    `query:"page" validate:"omitempty,number,min=1"`
+	Limit                  int    `query:"limit" validate:"omitempty,number,min=1,max=100"`
+	Search                 string `query:"search" validate:"omitempty,max=50"`
+	AreaId                 int    `query:"area_id" validate:"omitempty,number,gt=0"`
+	ActiveProjectFlockOnly bool   `query:"active_project_flock"`
 }

internal/modules/purchases/module.go

@@ -68,6 +68,7 @@ func (PurchaseModule) RegisterRoutes(router fiber.Router, db *gorm.DB, validate
 		warehouseRepo,
 		supplierRepo,
 		productWarehouseRepo,
+		projectFlockKandangRepository,
 		approvalService,
 		expenseBridge,
 	)

internal/modules/purchases/repositories/purchase.repository.go

@@ -24,6 +24,7 @@ type PurchaseRepository interface {
 	DeleteItems(ctx context.Context, purchaseID uint, itemIDs []uint) error
 	NextPrNumber(ctx context.Context, tx *gorm.DB) (string, error)
 	NextPoNumber(ctx context.Context, tx *gorm.DB) (string, error)
+	BackfillProjectFlockKandang(ctx context.Context, purchaseID uint) error
 }
 
 type PurchaseRepositoryImpl struct {
@@ -58,6 +59,34 @@ func (r *PurchaseRepositoryImpl) CreateWithItems(ctx context.Context, purchase *
 	return nil
 }
 
+func (r *PurchaseRepositoryImpl) BackfillProjectFlockKandang(ctx context.Context, purchaseID uint) error {
+	if purchaseID == 0 {
+		return nil
+	}
+
+	query := `
+WITH latest_pfk AS (
+	SELECT pfk.id, pfk.kandang_id
+	FROM project_flock_kandangs pfk
+	JOIN (
+		SELECT DISTINCT ON (approvable_id) approvable_id, step_name, action_at
+		FROM approvals
+		WHERE approvable_type = 'PROJECT_FLOCKS'
+		ORDER BY approvable_id, action_at DESC
+	) latest_approval ON latest_approval.approvable_id = pfk.project_flock_id
+	WHERE LOWER(latest_approval.step_name) = LOWER('Aktif')
+)
+UPDATE purchase_items pi
+SET project_flock_kandang_id = lp.id
+FROM warehouses w
+JOIN latest_pfk lp ON lp.kandang_id = w.kandang_id
+WHERE pi.purchase_id = ?
+  AND pi.project_flock_kandang_id IS NULL
+  AND pi.warehouse_id = w.id;
+`
+	return r.DB().WithContext(ctx).Exec(query, purchaseID).Error
+}
+
 func (r *PurchaseRepositoryImpl) CreateItems(ctx context.Context, purchaseID uint, items []*entity.PurchaseItem) error {
 	if len(items) == 0 {
 		return nil

internal/modules/purchases/services/expense_bridge.go

@@ -303,7 +303,6 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 	}
 
 	itemLinks := make(map[uint]itemLink)
-	existingExpenseByKey := make(map[string]uint64)
 	updatedExpenses := make(map[uint64]struct{})
 	if len(updates) > 0 {
 		ids := make([]uint, 0, len(updates))
@@ -341,16 +340,6 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 					Qty:               row.Qty,
 					Price:             row.Price,
 				}
-				if row.ExpenseID != 0 && row.SupplierID != 0 && !row.TransactionDate.IsZero() {
-					// Use warehouse from purchase item; if not found, skip key.
-					for i := range purchase.Items {
-						if purchase.Items[i].Id == row.ItemID {
-							key := groupingKey(row.SupplierID, row.TransactionDate.UTC().Truncate(24*time.Hour), purchase.Items[i].WarehouseId)
-							existingExpenseByKey[key] = row.ExpenseID
-							break
-						}
-					}
-				}
 			}
 		}
 	}
@@ -361,9 +350,6 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 	}
 
 	groups := make(map[string][]groupedItem)
-	toRecreate := make([]ExpenseReceivingPayload, 0)
-
-	movedFrom := make([]uint64, 0)
 
 	for _, payload := range updates {
 		if payload.ReceivedDate == nil {
@@ -383,10 +369,8 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 			supplierID = purchase.SupplierId
 		}
 
-		// Decide whether to update existing expense_nonstock or recreate.
+		// Decide whether to update existing expense_nonstock or create new.
 		link, hasLink := itemLinks[payload.PurchaseItemID]
-		requiresDelete := false
-		handledUpdate := false
 		if hasLink && link.ExpenseNonstockID != 0 && link.ExpenseID != 0 {
 			oldDate := link.TransactionDate.UTC().Truncate(24 * time.Hour)
 			newDate := receivedDate
@@ -396,39 +380,8 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 				pricePerItem = *payload.TransportPerItem
 			}
 
-			// Supplier/date change: prefer re-link to existing expense in target group; otherwise recreate.
-			if oldSupplier != supplierID || !oldDate.Equal(newDate) {
-				newKey := groupingKey(supplierID, newDate, payload.WarehouseID)
-				if targetExpenseID, ok := existingExpenseByKey[newKey]; ok && targetExpenseID != 0 {
-					// Move nonstock to existing expense header in the target group.
-					note := fmt.Sprintf("purchase_item:%d", payload.PurchaseItemID)
-					pricePerItem := item.Price
-					if payload.TransportPerItem != nil {
-						pricePerItem = *payload.TransportPerItem
-					}
-					if err := b.db.WithContext(ctx).
-						Model(&entity.ExpenseNonstock{}).
-						Where("id = ?", link.ExpenseNonstockID).
-						Updates(map[string]interface{}{
-							"expense_id": targetExpenseID,
-							"qty":        payload.ReceivedQty,
-							"price":      pricePerItem,
-							"notes":      note,
-						}).Error; err != nil {
-						return err
-					}
-					// Track cleanup for old header if it becomes empty.
-					movedFrom = append(movedFrom, link.ExpenseID)
-					existingExpenseByKey[newKey] = targetExpenseID
-					updatedExpenses[targetExpenseID] = struct{}{}
-					handledUpdate = true
-				} else {
-					requiresDelete = true
-				}
-			}
-
-			// If we reach here and no delete is required, update the existing nonstock fields and skip creation.
-			if !requiresDelete {
+			// If supplier/date unchanged, update nonstock in place.
+			if oldSupplier == supplierID && oldDate.Equal(newDate) {
 				note := fmt.Sprintf("purchase_item:%d", payload.PurchaseItemID)
 				if err := b.db.WithContext(ctx).
 					Model(&entity.ExpenseNonstock{}).
@@ -443,19 +396,139 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 				if link.ExpenseID != 0 {
 					updatedExpenses[link.ExpenseID] = struct{}{}
 				}
-				handledUpdate = true
+				continue
 			}
+
+			// Supplier/date changed: if the linked expense has only this nonstock, update it in place.
+			if link.ExpenseID != 0 {
+				var cnt int64
+				if err := b.db.WithContext(ctx).
+					Model(&entity.ExpenseNonstock{}).
+					Where("expense_id = ?", link.ExpenseID).
+					Count(&cnt).Error; err != nil {
+					return err
+				}
+				if cnt == 1 {
+					if item.Warehouse == nil || item.Warehouse.KandangId == nil || *item.Warehouse.KandangId == 0 {
+						return fiber.NewError(fiber.StatusBadRequest, "Warehouse not connect to kandangs")
+					}
+					newNonstockID, err := b.findExpeditionNonstockID(ctx, supplierID)
+					if err != nil {
+						return err
+					}
+					note := fmt.Sprintf("purchase_item:%d", payload.PurchaseItemID)
+					if err := b.db.WithContext(ctx).
+						Model(&entity.Expense{}).
+						Where("id = ?", link.ExpenseID).
+						Updates(map[string]interface{}{
+							"transaction_date": newDate,
+							"supplier_id":      supplierID,
+						}).Error; err != nil {
+						return err
+					}
+					updateBody := map[string]interface{}{
+						"qty":         payload.ReceivedQty,
+						"price":       pricePerItem,
+						"notes":       note,
+						"nonstock_id": newNonstockID,
+						"kandang_id":  uint64(*item.Warehouse.KandangId),
+					}
+					if err := b.db.WithContext(ctx).
+						Model(&entity.ExpenseNonstock{}).
+						Where("id = ?", link.ExpenseNonstockID).
+						Updates(updateBody).Error; err != nil {
+						return err
+					}
+					updatedExpenses[link.ExpenseID] = struct{}{}
+					continue
+				}
+
+				// Expense has multiple nonstocks: create new expense header for this item, then move existing nonstock to it.
+				var kandangID *uint
+				var projectFK *uint
+				if item.Warehouse != nil && item.Warehouse.KandangId != nil {
+					id := uint(*item.Warehouse.KandangId)
+					kandangID = &id
+					if project, err := b.projectFlockKandangRepo.GetActiveByKandangID(ctx, uint(*item.Warehouse.KandangId)); err == nil && project != nil {
+						pid := uint(project.Id)
+						projectFK = &pid
+					}
+				}
+				pricePerItem := item.Price
+				if payload.TransportPerItem != nil {
+					pricePerItem = *payload.TransportPerItem
+				}
+				totalPrice := pricePerItem * payload.ReceivedQty
+
+				gItem := groupedItem{
+					item:       item,
+					payload:    payload,
+					projectFK:  projectFK,
+					kandangID:  kandangID,
+					totalPrice: totalPrice,
+				}
+
+				newNonstockID, err := b.findExpeditionNonstockID(ctx, supplierID)
+				if err != nil {
+					return err
+				}
+
+				expenseDetail, err := b.createExpenseViaService(c, purchase, []groupedItem{gItem}, newDate, newNonstockID, purchase.PoNumber, supplierID)
+				if err != nil {
+					return err
+				}
+
+				var createdNonstockID uint64
+				if expenseDetail != nil {
+					noteMap := mapExpenseNotes(expenseDetail)
+					createdNonstockID = noteMap[payload.PurchaseItemID]
+				}
+
+				note := fmt.Sprintf("purchase_item:%d", payload.PurchaseItemID)
+				updateBody := map[string]interface{}{
+					"expense_id":  expenseDetail.Id,
+					"qty":         payload.ReceivedQty,
+					"price":       pricePerItem,
+					"notes":       note,
+					"nonstock_id": newNonstockID,
+				}
+				if kandangID != nil {
+					updateBody["kandang_id"] = uint64(*kandangID)
+				}
+				if projectFK != nil {
+					updateBody["project_flock_kandang_id"] = uint64(*projectFK)
+				}
+
+				if err := b.db.WithContext(ctx).
+					Model(&entity.ExpenseNonstock{}).
+					Where("id = ?", link.ExpenseNonstockID).
+					Updates(updateBody).Error; err != nil {
+					return err
+				}
+
+				if createdNonstockID != 0 {
+					if err := b.db.WithContext(ctx).Delete(&entity.ExpenseNonstock{}, createdNonstockID).Error; err != nil {
+						return err
+					}
+				}
+
+				if link.ExpenseID != 0 {
+					updatedExpenses[link.ExpenseID] = struct{}{}
+				}
+				if expenseDetail != nil && expenseDetail.Id != 0 {
+					updatedExpenses[uint64(expenseDetail.Id)] = struct{}{}
+				}
+				continue
+			}
+
+			// Otherwise create new expense/nonstock in grouping flow.
 		}
 
-		if requiresDelete {
-			toRecreate = append(toRecreate, payload)
-			continue
+		baseKey := fmt.Sprintf("%d:%s:%d", supplierID, utils.FormatDate(receivedDate), payload.WarehouseID)
+		key := baseKey
+		if hasLink && link.ExpenseNonstockID != 0 && link.ExpenseID != 0 {
+			key = fmt.Sprintf("%s:%d", baseKey, payload.PurchaseItemID)
 		}
-		if handledUpdate {
-			continue
-		}
-
-		key := fmt.Sprintf("%d:%s:%d", supplierID, utils.FormatDate(receivedDate), payload.WarehouseID)
 
 		var kandangID *uint
 		var projectFK *uint
@@ -481,54 +554,6 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 			kandangID:  kandangID,
 			totalPrice: totalPrice,
 		})
-		if existingID, ok := existingExpenseByKey[key]; ok && existingID != 0 {
-			updatedExpenses[existingID] = struct{}{}
-		}
-	}
-
-	// For payloads that require delete/recreate, clean up their old links first.
-	if len(toRecreate) > 0 {
-		if err := b.cleanupExistingNonstocks(ctx, toRecreate); err != nil {
-			return err
-		}
-		// Then add them back into grouping for creation.
-		for _, payload := range toRecreate {
-			item := itemMap[payload.PurchaseItemID]
-			if item == nil || payload.ReceivedDate == nil {
-				continue
-			}
-			receivedDate := payload.ReceivedDate.UTC().Truncate(24 * time.Hour)
-			supplierID := payload.SupplierID
-			if supplierID == 0 {
-				supplierID = purchase.SupplierId
-			}
-			key := fmt.Sprintf("%d:%s:%d", supplierID, utils.FormatDate(receivedDate), payload.WarehouseID)
-
-			var kandangID *uint
-			var projectFK *uint
-			if item.Warehouse != nil && item.Warehouse.KandangId != nil {
-				id := uint(*item.Warehouse.KandangId)
-				kandangID = &id
-				if project, err := b.projectFlockKandangRepo.GetActiveByKandangID(ctx, uint(*item.Warehouse.KandangId)); err == nil && project != nil {
-					pid := uint(project.Id)
-					projectFK = &pid
-				}
-			}
-
-			pricePerItem := item.Price
-			if payload.TransportPerItem != nil {
-				pricePerItem = *payload.TransportPerItem
-			}
-			totalPrice := pricePerItem * payload.ReceivedQty
-
-			groups[key] = append(groups[key], groupedItem{
-				item:       item,
-				payload:    payload,
-				projectFK:  projectFK,
-				kandangID:  kandangID,
-				totalPrice: totalPrice,
-			})
-		}
 	}
 
 	for key, items := range groups {
@@ -536,7 +561,7 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 			continue
 		}
 		parts := strings.Split(key, ":")
-		if len(parts) != 3 {
+		if len(parts) < 3 {
 			return errors.New("invalid expense grouping key")
 		}
 		expenseDate, err := utils.ParseDateString(parts[1])
@@ -566,13 +591,6 @@ func (b *expenseBridge) OnItemsReceived(c *fiber.Ctx, purchaseID uint, updates [
 		}
 	}
 
-	// Cleanup old expense headers that became empty after re-link.
-	if len(movedFrom) > 0 {
-		if err := b.cleanupEmptyExpenses(ctx, movedFrom); err != nil {
-			return err
-		}
-	}
-
 	if len(updatedExpenses) > 0 {
 		if err := b.markExpensesUpdated(ctx, updatedExpenses, purchase.CreatedBy); err != nil {
 			return err
@@ -691,25 +709,7 @@ func (b *expenseBridge) linkExpenseNonstocksToItems(ctx context.Context, detail
 		return nil
 	}
 
-	noteToExpenseNonstock := make(map[uint]uint64)
-	for _, kandang := range detail.Kandangs {
-		for _, pengajuan := range kandang.Pengajuans {
-			note := strings.TrimSpace(pengajuan.Notes)
-			if note == "" {
-				continue
-			}
-			const prefix = "purchase_item:"
-			if !strings.HasPrefix(note, prefix) {
-				continue
-			}
-			idStr := strings.TrimPrefix(note, prefix)
-			var itemID uint
-			if _, err := fmt.Sscanf(idStr, "%d", &itemID); err != nil {
-				continue
-			}
-			noteToExpenseNonstock[itemID] = pengajuan.Id
-		}
-	}
+	noteToExpenseNonstock := mapExpenseNotes(detail)
 
 	if len(noteToExpenseNonstock) == 0 {
 		return nil
@@ -730,3 +730,29 @@ func (b *expenseBridge) linkExpenseNonstocksToItems(ctx context.Context, detail
 
 	return nil
 }
+
+func mapExpenseNotes(detail *expenseDto.ExpenseDetailDTO) map[uint]uint64 {
+	result := make(map[uint]uint64)
+	if detail == nil {
+		return result
+	}
+	for _, kandang := range detail.Kandangs {
+		for _, pengajuan := range kandang.Pengajuans {
+			note := strings.TrimSpace(pengajuan.Notes)
+			if note == "" {
+				continue
+			}
+			const prefix = "purchase_item:"
+			if !strings.HasPrefix(note, prefix) {
+				continue
+			}
+			idStr := strings.TrimPrefix(note, prefix)
+			var itemID uint
+			if _, err := fmt.Sscanf(idStr, "%d", &itemID); err != nil {
+				continue
+			}
+			result[itemID] = pengajuan.Id
+		}
+	}
+	return result
+}

internal/modules/purchases/services/purchase.service.go

@@ -16,6 +16,7 @@ import (
 	rProduct "gitlab.com/mbugroup/lti-api.git/internal/modules/master/products/repositories"
 	rSupplier "gitlab.com/mbugroup/lti-api.git/internal/modules/master/suppliers/repositories"
 	rWarehouse "gitlab.com/mbugroup/lti-api.git/internal/modules/master/warehouses/repositories"
+	projectFlockKandangRepo "gitlab.com/mbugroup/lti-api.git/internal/modules/production/project_flocks/repositories"
 	rPurchase "gitlab.com/mbugroup/lti-api.git/internal/modules/purchases/repositories"
 	validation "gitlab.com/mbugroup/lti-api.git/internal/modules/purchases/validations"
 	"gitlab.com/mbugroup/lti-api.git/internal/utils"
@@ -43,16 +44,17 @@ const (
 )
 
 type purchaseService struct {
-	Log                  *logrus.Logger
-	Validate             *validator.Validate
-	PurchaseRepo         rPurchase.PurchaseRepository
-	ProductRepo          rProduct.ProductRepository
-	WarehouseRepo        rWarehouse.WarehouseRepository
-	SupplierRepo         rSupplier.SupplierRepository
-	ProductWarehouseRepo rProductWarehouse.ProductWarehouseRepository
-	ApprovalSvc          commonSvc.ApprovalService
-	ExpenseBridge        PurchaseExpenseBridge
-	approvalWorkflow     approvalutils.ApprovalWorkflowKey
+	Log                     *logrus.Logger
+	Validate                *validator.Validate
+	PurchaseRepo            rPurchase.PurchaseRepository
+	ProductRepo             rProduct.ProductRepository
+	WarehouseRepo           rWarehouse.WarehouseRepository
+	SupplierRepo            rSupplier.SupplierRepository
+	ProductWarehouseRepo    rProductWarehouse.ProductWarehouseRepository
+	ProjectFlockKandangRepo projectFlockKandangRepo.ProjectFlockKandangRepository
+	ApprovalSvc             commonSvc.ApprovalService
+	ExpenseBridge           PurchaseExpenseBridge
+	approvalWorkflow        approvalutils.ApprovalWorkflowKey
 }
 
 type staffAdjustmentPayload struct {
@@ -67,20 +69,22 @@ func NewPurchaseService(
 	warehouseRepo rWarehouse.WarehouseRepository,
 	supplierRepo rSupplier.SupplierRepository,
 	productWarehouseRepo rProductWarehouse.ProductWarehouseRepository,
+	projectFlockKandangRepo projectFlockKandangRepo.ProjectFlockKandangRepository,
 	approvalSvc commonSvc.ApprovalService,
 	expenseBridge PurchaseExpenseBridge,
 ) PurchaseService {
 	return &purchaseService{
-		Log:                  utils.Log,
-		Validate:             validate,
-		PurchaseRepo:         purchaseRepo,
-		ProductRepo:          productRepo,
-		WarehouseRepo:        warehouseRepo,
-		SupplierRepo:         supplierRepo,
-		ProductWarehouseRepo: productWarehouseRepo,
-		ApprovalSvc:          approvalSvc,
-		ExpenseBridge:        expenseBridge,
-		approvalWorkflow:     utils.ApprovalWorkflowPurchase,
+		Log:                     utils.Log,
+		Validate:                validate,
+		PurchaseRepo:            purchaseRepo,
+		ProductRepo:             productRepo,
+		WarehouseRepo:           warehouseRepo,
+		SupplierRepo:            supplierRepo,
+		ProductWarehouseRepo:    productWarehouseRepo,
+		ProjectFlockKandangRepo: projectFlockKandangRepo,
+		ApprovalSvc:             approvalSvc,
+		ExpenseBridge:           expenseBridge,
+		approvalWorkflow:        utils.ApprovalWorkflowPurchase,
 	}
 }
 func (s *purchaseService) withRelations(db *gorm.DB) *gorm.DB {
@@ -221,6 +225,7 @@ func (s *purchaseService) CreateOne(c *fiber.Ctx, req *validation.CreatePurchase
 		productId   uint
 		warehouseId uint
 		subQty      float64
+		pfkID       *uint
 	}
 
 	if len(req.Items) == 0 {
@@ -229,9 +234,9 @@ func (s *purchaseService) CreateOne(c *fiber.Ctx, req *validation.CreatePurchase
 
 	warehouseCache := make(map[uint]*entity.Warehouse)
 	productSupplierCache := make(map[uint]bool)
-	getWarehouse := func(id uint) (*entity.Warehouse, error) {
+	getWarehouse := func(id uint) (*entity.Warehouse, *uint, error) {
 		if warehouse, ok := warehouseCache[id]; ok {
-			return warehouse, nil
+			return warehouse, nil, nil
 		}
 		warehouse, err := s.WarehouseRepo.GetByID(c.Context(), id, func(db *gorm.DB) *gorm.DB {
 			return db.Preload("Area").Preload("Location")
@@ -239,21 +244,37 @@ func (s *purchaseService) CreateOne(c *fiber.Ctx, req *validation.CreatePurchase
 
 		if err != nil {
 			if errors.Is(err, gorm.ErrRecordNotFound) {
-				return nil, fiber.NewError(fiber.StatusNotFound, fmt.Sprintf("Warehouse %d not found", id))
+				return nil, nil, fiber.NewError(fiber.StatusNotFound, fmt.Sprintf("Warehouse %d not found", id))
 			}
 			s.Log.Errorf("Failed to get warehouse %d: %+v", id, err)
-			return nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to get warehouse")
+			return nil, nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to get warehouse")
+		}
+		if warehouse.KandangId == nil || *warehouse.KandangId == 0 {
+			return nil, nil, fiber.NewError(fiber.StatusBadRequest, fmt.Sprintf("Warehouse %d is not linked to a kandang", id))
+		}
+		var pfkID *uint
+		if s.ProjectFlockKandangRepo != nil {
+			if pfk, err := s.ProjectFlockKandangRepo.GetActiveByKandangID(c.Context(), uint(*warehouse.KandangId)); err == nil && pfk != nil {
+				idCopy := uint(pfk.Id)
+				pfkID = &idCopy
+			} else if errors.Is(err, gorm.ErrRecordNotFound) {
+				return nil, nil, fiber.NewError(fiber.StatusBadRequest, fmt.Sprintf("Warehouse %d has no active project flock", id))
+			} else if err != nil {
+				s.Log.Errorf("Failed to validate project flock for warehouse %d: %+v", id, err)
+				return nil, nil, fiber.NewError(fiber.StatusInternalServerError, "Failed to validate project flock")
+			}
 		}
 
 		warehouseCache[id] = warehouse
-		return warehouse, nil
+		return warehouse, pfkID, nil
 	}
 
 	aggregated := make([]*aggregatedItem, 0, len(req.Items))
 	indexMap := make(map[string]int)
 
 	for _, item := range req.Items {
-		if _, err := getWarehouse(item.WarehouseID); err != nil {
+		_, pfkID, err := getWarehouse(item.WarehouseID)
+		if err != nil {
 			return nil, err
 		}
 
@@ -282,6 +303,7 @@ func (s *purchaseService) CreateOne(c *fiber.Ctx, req *validation.CreatePurchase
 			productId:   productId,
 			warehouseId: warehouseId,
 			subQty:      item.Quantity,
+			pfkID:       pfkID,
 		}
 		aggregated = append(aggregated, entry)
 		indexMap[key] = len(aggregated) - 1
@@ -308,14 +330,15 @@ func (s *purchaseService) CreateOne(c *fiber.Ctx, req *validation.CreatePurchase
 	emptyVehicle := ""
 	for _, item := range aggregated {
 		items = append(items, &entity.PurchaseItem{
-			ProductId:     item.productId,
-			WarehouseId:   item.warehouseId,
-			SubQty:        item.subQty,
-			TotalQty:      0,
-			TotalUsed:     0,
-			Price:         0,
-			TotalPrice:    0,
-			VehicleNumber: &emptyVehicle,
+			ProductId:             item.productId,
+			WarehouseId:           item.warehouseId,
+			ProjectFlockKandangId: item.pfkID,
+			SubQty:                item.subQty,
+			TotalQty:              0,
+			TotalUsed:             0,
+			Price:                 0,
+			TotalPrice:            0,
+			VehicleNumber:         &emptyVehicle,
 		})
 	}
 
@@ -332,6 +355,10 @@ func (s *purchaseService) CreateOne(c *fiber.Ctx, req *validation.CreatePurchase
 			return err
 		}
 
+		if err := purchaseRepoTx.BackfillProjectFlockKandang(c.Context(), purchase.Id); err != nil {
+			return err
+		}
+
 		actorID := uint(purchase.CreatedBy)
 		if err := s.createPurchaseApproval(c.Context(), tx, purchase.Id, utils.PurchaseStepPengajuan, entity.ApprovalActionCreated, actorID, nil, false); err != nil {
 			return err