Solution

.flake8

@@ -7,4 +7,4 @@ select = B,C,E,F,W,T4,B9,Q0,N8,VNE
 exclude =
     **migrations
     venv
-    tests
+    tests

.gitignore

@@ -6,3 +6,4 @@
 venv/
 .pytest_cache/
 **__pycache__/
+db.sqlite3

cinema/models.py

@@ -27,6 +27,10 @@ class Actor(models.Model):
     first_name = models.CharField(max_length=255)
     last_name = models.CharField(max_length=255)
 
+    @property
+    def full_name(self) -> str:
+        return f"{self.first_name} {self.last_name}"
+
     def __str__(self):
         return self.first_name + " " + self.last_name
 

cinema/serializers.py

@@ -1 +1,71 @@
-# write serializers here
+from rest_framework import serializers
+
+from cinema.models import CinemaHall, Genre, Actor, Movie, MovieSession
+
+
+class CinemaHallSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = CinemaHall
+        fields = ["id", "name", "rows", "seats_in_row", "capacity"]
+
+
+class GenreSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Genre
+        fields = "__all__"
+
+
+class ActorSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Actor
+        fields = ["id", "first_name", "last_name", "full_name"]
+
+
+class MovieSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Movie
+        fields = "__all__"
+
+
+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 MovieRetrieveSerializer(MovieSerializer):
+    genres = GenreSerializer(many=True, read_only=True)
+    actors = ActorSerializer(many=True, read_only=True)
+
+
+class MovieSessionSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = MovieSession
+        fields = "__all__"
+
+
+class MovieSessionListSerializer(serializers.ModelSerializer):
+    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 MovieSessionRetrieveSerializer(MovieSessionSerializer):
+    movie = MovieListSerializer()
+    cinema_hall = CinemaHallSerializer()

cinema/urls.py

@@ -1 +1,21 @@
-# write urls here
+from django.urls import include, path
+from rest_framework import routers
+
+from cinema.views import (
+    CinemaHallViewSet,
+    GenreViewSet,
+    MovieViewSet,
+    ActorViewSet,
+    MovieSessionViewSet
+)
+
+app_name = "cinema"
+
+router = routers.DefaultRouter()
+router.register("cinema_halls", CinemaHallViewSet)
+router.register("genres", GenreViewSet)
+router.register("actors", ActorViewSet)
+router.register("movies", MovieViewSet)
+router.register("movie_sessions", MovieSessionViewSet)
+
+urlpatterns = [path("", include(router.urls))]

cinema/views.py

@@ -1 +1,63 @@
-# write views here
+from rest_framework import viewsets
+
+from cinema.models import Movie, CinemaHall, Genre, Actor, MovieSession
+from cinema.serializers import (
+    MovieSerializer,
+    CinemaHallSerializer,
+    GenreSerializer,
+    ActorSerializer,
+    MovieSessionSerializer,
+    MovieSessionListSerializer,
+    MovieListSerializer,
+    MovieRetrieveSerializer,
+    MovieSessionRetrieveSerializer
+)
+
+
+class CinemaHallViewSet(viewsets.ModelViewSet):
+    queryset = CinemaHall.objects.all()
+    serializer_class = CinemaHallSerializer
+
+
+class GenreViewSet(viewsets.ModelViewSet):
+    queryset = Genre.objects.all()
+    serializer_class = GenreSerializer
+
+
+class ActorViewSet(viewsets.ModelViewSet):
+    queryset = Actor.objects.all()
+    serializer_class = ActorSerializer
+
+
+class MovieViewSet(viewsets.ModelViewSet):
+    queryset = Movie.objects.all()
+
+    def get_serializer_class(self):
+        if self.action == "list":
+            return MovieListSerializer
+        elif self.action == "retrieve":
+            return MovieRetrieveSerializer
+        return MovieSerializer
+
+    def get_queryset(self):
+        queryset = self.queryset
+        if self.action in ("list", "retrieve"):
+            return queryset.prefetch_related("genres", "actors")
+        return queryset
+
+
+class MovieSessionViewSet(viewsets.ModelViewSet):
+    queryset = MovieSession.objects.all()
+
+    def get_serializer_class(self):
+        if self.action == "list":
+            return MovieSessionListSerializer
+        elif self.action == "retrieve":
+            return MovieSessionRetrieveSerializer
+        return MovieSessionSerializer
+
+    def get_queryset(self):
+        queryset = self.queryset
+        if self.action in ("list", "retrieve"):
+            return queryset.select_related("movie", "cinema_hall")
+        return queryset

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", namespace="cinema")),
 ]

requirements.txt

@@ -3,4 +3,4 @@ djangorestframework==3.13.1
 flake8==5.0.4
 flake8-quotes==3.3.1
 flake8-variables-names==0.0.5
-pep8-naming==0.13.2
+pep8-naming==0.13.2