Product rendering, cart functionality

repositories/products.py

@@ -1,5 +1,5 @@
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlalchemy import select
+from sqlalchemy import select, update
 from typing import Optional
 
 from db.models import Product
@@ -26,3 +26,15 @@ class ProductRepository:
         result = await session.scalars(stmt)
 
         return list(result)
+
+    async def add_product_file_id(
+        self, session: AsyncSession, product_id: int, *, file_id: str
+    ) -> None:
+        stmt = (
+            update(Product.__table__)
+            .where(Product.id == product_id)
+            .where(Product.file_id is None)
+            .values(file_id=file_id)
+        )
+        await session.execute(stmt)
+        await session.commit()