feat: add endpoint product detail

src/product/product.service.ts

@@ -1,5 +1,5 @@
 import { HttpException, HttpStatus } from '@nestjs/common';
-import { EntityNotFoundError, IsNull, Repository } from 'typeorm';
+import { EntityNotFoundError, Repository } from 'typeorm';
 import { Product } from './entities/product.entity';
 import { InjectRepository } from '@nestjs/typeorm';
 import { CreateProductDto } from './dto/product/create-product.dto';
@@ -357,6 +357,29 @@ export class ProductService {
     }
   }
 
+  async findOneById(id: string) {
+    try {
+      return await this.productRepository.findOneOrFail({
+        relations: ['supplier'],
+        where: {
+          id: id,
+        },
+      });
+    } catch (e) {
+      if (e instanceof EntityNotFoundError) {
+        throw new HttpException(
+          {
+            statusCode: HttpStatus.NOT_FOUND,
+            error: 'Product not found',
+          },
+          HttpStatus.NOT_FOUND,
+        );
+      } else {
+        throw e;
+      }
+    }
+  }
+
   async update(id: string, updateProductDto: UpdateProductDto) {
     try {
       await this.productRepository.findOneOrFail(id);