From 301dee671ab364a1e551a5fa72ce70370bb17cc6 Mon Sep 17 00:00:00 2001
From: Ivlev Denis <di-erz@yandex.ru>
Date: Mon, 5 Feb 2018 12:51:00 +0300
Subject: [PATCH] LIL-175. Optimize CourseViewSet queryset

---
 api/v1/views.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/api/v1/views.py b/api/v1/views.py
index 96b6feae..d7f51465 100644
--- a/api/v1/views.py
+++ b/api/v1/views.py
@@ -7,6 +7,10 @@ from apps.course.models import Course
 
 
 class CourseViewSet(ExtendedModelViewSet):
-    queryset = Course.objects.all()
+    queryset = Course.objects.select_related(
+        'author', 'category'
+    ).prefetch_related(
+        'likes', 'materials'
+    ).all()
     serializer_class = CourseSerializer
     filter_fields = ('category',)