Fixed key issue

@@ -195,14 +195,14 @@ class ItemViewSet(viewsets.ViewSet):
         s3_bucket = AWS_STORAGE_BUCKET_NAME
 
         item = Item.objects.filter(item_id=pk)
-        object_id = item.get().item_id
+        object_name = item.get().name
         data = serializers.serialize("json", item)
         json_data = json.loads(data)
 
         presigned_url = s3.generate_presigned_url(
             'get_object',
             Params={'Bucket': s3_bucket,
-                    'Key': object_id},
+                    'Key': object_name},
             ExpiresIn=3600
         )
 
@@ -398,6 +398,7 @@ class ItemViewSet(viewsets.ViewSet):
             # 파일 객체 생성
             file_name = request.POST.get('name', '')
             file_size = request.POST.get('size', '')
+            file_id = request.POST.get('item_id', '')
             file_parent = pk
             file_type = mimetypes.guess_type(file_name)[0]
             upload_item = Item(name=file_name, size=file_size, user_id=1, file_type=file_type, parent=file_parent)