Solution

cinema/models.py

@@ -20,8 +20,8 @@ class Movie(models.Model):
     title = models.CharField(max_length=255)
     description = models.TextField()
     duration = models.IntegerField()
-    actors = models.ManyToManyField(Actor)
-    genres = models.ManyToManyField(Genre)
+    actors = models.ManyToManyField(Actor, related_name="movies")
+    genres = models.ManyToManyField(Genre, related_name="movies")
 
     def __str__(self):
         return self.title

cinema/urls.py

@@ -29,7 +29,7 @@
     path("actors/", ActorList.as_view(), name="actor-list"),
     path("actors/<int:pk>/", ActorDetail.as_view(), name="actor-detail"),
     path("cinemahall/", cinema_hall_list, name="cinema-hall-list"),
-    path("cinamehall/<int:pk>/",
+    path("cinemehall/<int:pk>/",
          cinema_hall_detail,
          name="cinema-hall-detail"),
     path("", include(router.urls)),

cinema/views.py

@@ -1,8 +1,8 @@
+from django.shortcuts import get_object_or_404
+
+from rest_framework import status, mixins, viewsets
 from rest_framework.generics import GenericAPIView
 from rest_framework.response import Response
-from rest_framework import status, mixins, viewsets
-
-from django.shortcuts import get_object_or_404
 from rest_framework.views import APIView
 from rest_framework.viewsets import GenericViewSet