solution

cinema/models.py

@@ -27,8 +27,12 @@ class Actor(models.Model):
     first_name = models.CharField(max_length=255)
     last_name = models.CharField(max_length=255)
 
+    @property
+    def full_name(self):
+        return self.__str__()
+
     def __str__(self):
-        return self.first_name + " " + self.last_name
+        return f"{self.first_name} {self.last_name}"
 
 
 class Movie(models.Model):

cinema/serializers.py

@@ -1 +1,67 @@
-# write serializers here
+from rest_framework import serializers
+from .models import Actor, CinemaHall, Genre, Movie, MovieSession, Order, \
+    Ticket
+
+
+class ActorSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Actor
+        fields = ["id", "first_name", "last_name", "full_name"]
+
+
+class GenreSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Genre
+        fields = ["id", "name"]
+
+
+class MovieSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Movie
+        fields = ["id", "title", "description", "duration", "genres", "actors"]
+
+
+class MovieListSerializer(MovieSerializer):
+    genres = serializers.SlugRelatedField(
+        many=True, read_only=True, slug_field="name"
+    )
+    actors = serializers.SlugRelatedField(
+        many=True, read_only=True, slug_field="full_name"
+    )
+
+
+class MovieDetailSerializer(MovieSerializer):
+    genres = GenreSerializer(many=True, read_only=True)
+    actors = ActorSerializer(many=True, read_only=True)
+
+
+class CinemaHallSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CinemaHall
+        fields = ["id", "name", "rows", "seats_in_row", "capacity"]
+
+
+class MovieSessionSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = MovieSession
+        fields = ["id", "show_time", "movie", "cinema_hall"]
+
+
+class MovieSessionListSerializer(MovieSessionSerializer):
+    movie_title = serializers.CharField(source="movie.title", read_only=True)
+    cinema_hall_name = serializers.CharField(
+        source="cinema_hall.name", read_only=True
+    )
+    cinema_hall_capacity = serializers.IntegerField(
+        source="cinema_hall.capacity", read_only=True
+    )
+
+    class Meta:
+        model = MovieSession
+        fields = ["id", "show_time", "movie_title", "cinema_hall_name",
+                  "cinema_hall_capacity"]
+
+
+class MovieSessionDetailSerializer(MovieSessionSerializer):
+    movie = MovieListSerializer(read_only=True)
+    cinema_hall = CinemaHallSerializer(read_only=True)

cinema/urls.py

@@ -1 +1,16 @@
-# write urls here
+from django.urls import path, include
+from rest_framework import routers
+
+from cinema.views import GenreViewSet, ActorViewSet, CinemaHallViewSet, \
+    MovieViewSet, MovieSessionViewSet
+
+router = routers.DefaultRouter()
+router.register("genres", GenreViewSet)
+router.register("actors", ActorViewSet)
+router.register("cinema_halls", CinemaHallViewSet)
+router.register("movies", MovieViewSet)
+router.register("movie_sessions", MovieSessionViewSet)
+
+urlpatterns = [
+    path("", include(router.urls)),
+]

cinema/views.py

@@ -1 +1,43 @@
-# write views here
+from rest_framework import viewsets
+from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession
+from cinema.serializers import GenreSerializer, ActorSerializer, \
+    CinemaHallSerializer, MovieSerializer, MovieSessionSerializer, \
+    MovieListSerializer, MovieDetailSerializer, MovieSessionListSerializer, \
+    MovieSessionDetailSerializer
+
+
+class GenreViewSet(viewsets.ModelViewSet):
+    queryset = Genre.objects.all()
+    serializer_class = GenreSerializer
+
+
+class ActorViewSet(viewsets.ModelViewSet):
+    queryset = Actor.objects.all()
+    serializer_class = ActorSerializer
+
+
+class CinemaHallViewSet(viewsets.ModelViewSet):
+    queryset = CinemaHall.objects.all()
+    serializer_class = CinemaHallSerializer
+
+
+class MovieViewSet(viewsets.ModelViewSet):
+    queryset = Movie.objects.prefetch_related("actors", "genres")
+
+    def get_serializer_class(self):
+        if self.action == "list":
+            return MovieListSerializer
+        elif self.action == "retrieve":
+            return MovieDetailSerializer
+        return MovieSerializer
+
+
+class MovieSessionViewSet(viewsets.ModelViewSet):
+    queryset = MovieSession.objects.select_related("movie", "cinema_hall")
+
+    def get_serializer_class(self):
+        if self.action == "list":
+            return MovieSessionListSerializer
+        elif self.action == "retrieve":
+            return MovieSessionDetailSerializer
+        return MovieSessionSerializer

cinema_service/urls.py

@@ -1,6 +1,7 @@
 from django.contrib import admin
-from django.urls import path
+from django.urls import path, include
 
 urlpatterns = [
     path("admin/", admin.site.urls),
+    path("api/cinema/", include("cinema.urls")),
 ]