init

src/api/inventory/product_routes.py

@@ -13,6 +13,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy import select, or_, func, delete
 from typing import Optional, List, Dict
+from decimal import Decimal
 
 from database.database import get_db_session
 from services.auth_service import get_current_active_user, get_current_admin_user
@@ -45,10 +46,10 @@ async def _calculate_material_cost_map(db_session: AsyncSession, product_ids: Li
         .where(ProductMaterial.finished_product_id.in_(product_ids))
         .group_by(ProductMaterial.finished_product_id)
     )
-    return {row[0]: float(row[1] or 0) for row in result.all()}
+    return {row[0]: Decimal(str(row[1] or 0)) for row in result.all()}
 
 
-def _build_product_response(product: Product, material_cost: float = 0) -> ProductResponse:
+def _build_product_response(product: Product, material_cost: Decimal = Decimal("0")) -> ProductResponse:
     return ProductResponse(
         id=product.id,
         sku=product.sku,
@@ -57,11 +58,11 @@ def _build_product_response(product: Product, material_cost: float = 0) -> Produ
         category=product.category,
         unit=product.unit,
         item_type=product.item_type,
-        cost_price=float(product.cost_price or 0),
-        sale_price=float(product.sale_price or 0),
+        cost_price=Decimal(str(product.cost_price or 0)),
+        sale_price=Decimal(str(product.sale_price or 0)),
         min_stock=product.min_stock,
         max_stock=product.max_stock,
-        material_cost=round(float(material_cost), 4),
+        material_cost=Decimal(str(material_cost)).quantize(Decimal("0.0001")),
         is_active=product.is_active,
         created_at=product.created_at,
     )
@@ -184,25 +185,25 @@ async def get_product_bom(
     )
 
     items: List[ProductMaterialItemResponse] = []
-    total_material_cost = 0.0
+    total_material_cost = Decimal("0")
     for bom, material in bom_result.all():
-        line_cost = float(material.cost_price or 0) * float(bom.quantity)
+        line_cost = Decimal(str(material.cost_price or 0)) * Decimal(str(bom.quantity))
         total_material_cost += line_cost
         items.append(
             ProductMaterialItemResponse(
                 material_id=material.id,
                 material_sku=material.sku,
                 material_name=material.name,
-                quantity=round(float(bom.quantity), 4),
-                unit_cost=round(float(material.cost_price or 0), 4),
-                line_cost=round(float(line_cost), 4),
+                quantity=Decimal(str(bom.quantity)),
+                unit_cost=Decimal(str(material.cost_price or 0)),
+                line_cost=line_cost,
             )
         )
 
     return ProductBOMResponse(
         product_id=product.id,
         product_name=product.name,
-        total_material_cost=round(float(total_material_cost), 4),
+        total_material_cost=total_material_cost,
         items=items,
     )