fix

src/modules/products/dto/product-response.dto.ts

@@ -1,4 +1,4 @@
-import { Expose, Type } from 'class-transformer';
+import { Expose, Type, Transform } from 'class-transformer';
 import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
 
 export class CategoryInProductResponseDto {
@@ -38,6 +38,7 @@ export class ProductResponseDto {
 
   @ApiProperty({ description: 'Product price' })
   @Expose()
+  @Transform(({ value }) => parseFloat(value))
   price: number;
 
   @ApiPropertyOptional({ description: 'Product image URL' })
@@ -50,6 +51,7 @@ export class ProductResponseDto {
 
   @ApiProperty({ description: 'Stock quantity' })
   @Expose()
+  @Transform(({ value }) => parseInt(value, 10))
   stockQuantity: number;
 
   @ApiProperty({ description: 'Availability status' })

src/modules/transactions/dto/transaction-response.dto.ts

@@ -1,5 +1,5 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { Exclude, Expose, Type } from 'class-transformer';
+import { Exclude, Expose, Type, Transform } from 'class-transformer';
 
 @Exclude()
 export class TransactionItemResponseDto {
@@ -17,14 +17,17 @@ export class TransactionItemResponseDto {
 
   @Expose()
   @ApiProperty({ description: 'Product price at transaction time' })
+  @Transform(({ value }) => parseFloat(value))
   price: number;
 
   @Expose()
   @ApiProperty({ description: 'Quantity purchased' })
+  @Transform(({ value }) => parseInt(value, 10))
   quantity: number;
 
   @Expose()
   @ApiProperty({ description: 'Line total (price * quantity)' })
+  @Transform(({ value }) => parseFloat(value))
   lineTotal: number;
 }
 
@@ -36,18 +39,22 @@ export class TransactionResponseDto {
 
   @Expose()
   @ApiProperty({ description: 'Subtotal before tax and discount' })
+  @Transform(({ value }) => parseFloat(value))
   subtotal: number;
 
   @Expose()
   @ApiProperty({ description: 'Tax amount' })
+  @Transform(({ value }) => parseFloat(value))
   tax: number;
 
   @Expose()
   @ApiProperty({ description: 'Discount amount' })
+  @Transform(({ value }) => parseFloat(value))
   discount: number;
 
   @Expose()
   @ApiProperty({ description: 'Total amount (subtotal + tax - discount)' })
+  @Transform(({ value }) => parseFloat(value))
   total: number;
 
   @Expose()