'Solution'

cinema/models.py

@@ -1,10 +1,36 @@
 from django.db import models
 
 
+class Genre(models.Model):
+    name = models.CharField(max_length=255, unique=True)
+
+    def __str__(self):
+        return self.name
+
+
+class Actor(models.Model):
+    first_name = models.CharField(max_length=255)
+    last_name = models.CharField(max_length=255)
+
+    def __str__(self):
+        return f"{self.first_name} {self.last_name}"
+
+
+class CinemaHall(models.Model):
+    name = models.CharField(max_length=255)
+    rows = models.PositiveIntegerField()
+    seats_in_row = models.PositiveIntegerField()
+
+    def __str__(self):
+        return self.name
+
+
 class Movie(models.Model):
     title = models.CharField(max_length=255)
     description = models.TextField()
-    duration = models.IntegerField()
+    actors = models.ManyToManyField(Actor)
+    genres = models.ManyToManyField(Genre)
+    duration = models.PositiveIntegerField()
 
     def __str__(self):
-        return self.title
+        return self.title

cinema/serializers.py

@@ -1,6 +1,50 @@
 from rest_framework import serializers
+from cinema.models import Movie, Genre, Actor, CinemaHall
 
-from cinema.models import Movie
+
+class GenreSerializer(serializers.Serializer):
+    id = serializers.IntegerField(read_only=True)
+    name = serializers.CharField(max_length=255)
+
+    def create(self, validated_data):
+        return Genre.objects.create(**validated_data)
+
+    def update(self, instance, validated_data):
+        instance.name = validated_data.get("name", instance.name)
+        instance.save()
+        return instance
+
+
+class ActorSerializer(serializers.Serializer):
+    id = serializers.IntegerField(read_only=True)
+    first_name = serializers.CharField(max_length=255)
+    last_name = serializers.CharField(max_length=255)
+
+    def create(self, validated_data):
+        return Actor.objects.create(**validated_data)
+
+    def update(self, instance, validated_data):
+        instance.first_name = validated_data.get("first_name", instance.first_name)
+        instance.last_name = validated_data.get("last_name", instance.last_name)
+        instance.save()
+        return instance
+
+
+class CinemaHallSerializer(serializers.Serializer):
+    id = serializers.IntegerField(read_only=True)
+    name = serializers.CharField(max_length=255)
+    rows = serializers.IntegerField()
+    seats_in_row = serializers.IntegerField()
+
+    def create(self, validated_data):
+        return CinemaHall.objects.create(**validated_data)
+
+    def update(self, instance, validated_data):
+        instance.name = validated_data.get("name", instance.name)
+        instance.rows = validated_data.get("rows", instance.rows)
+        instance.seats_in_row = validated_data.get("seats_in_row", instance.seats_in_row)
+        instance.save()
+        return instance
 
 
 class MovieSerializer(serializers.Serializer):
@@ -14,11 +58,7 @@ def create(self, validated_data):
 
     def update(self, instance, validated_data):
         instance.title = validated_data.get("title", instance.title)
-        instance.description = validated_data.get(
-            "description", instance.description
-        )
+        instance.description = validated_data.get("description", instance.description)
         instance.duration = validated_data.get("duration", instance.duration)
-
         instance.save()
-
         return instance

cinema/urls.py

@@ -1,10 +1,13 @@
-from django.urls import path
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+from cinema.views import MovieViewSet
 
-from cinema.views import movie_list, movie_detail
+
+router = DefaultRouter()
+router.register(r"movies", MovieViewSet)
 
 urlpatterns = [
-    path("movies/", movie_list, name="movie-list"),
-    path("movies/<int:pk>/", movie_detail, name="movie-detail"),
+    path("", include(router.urls))
 ]
 
 app_name = "cinema"

cinema/views.py

@@ -1,45 +1,95 @@
-from rest_framework.decorators import api_view
+from rest_framework.views import APIView
+from rest_framework.generics import ListCreateAPIView, RetrieveUpdateDestroyAPIView
+from rest_framework import viewsets
 from rest_framework.response import Response
 from rest_framework import status
 
 from django.shortcuts import get_object_or_404
 
-from cinema.models import Movie
-from cinema.serializers import MovieSerializer
+from cinema.models import Movie, Genre, Actor, CinemaHall
+from cinema.serializers import MovieSerializer, GenreSerializer, ActorSerializer, CinemaHallSerializer
 
 
-@api_view(["GET", "POST"])
-def movie_list(request):
-    if request.method == "GET":
-        movies = Movie.objects.all()
-        serializer = MovieSerializer(movies, many=True)
-        return Response(serializer.data, status=status.HTTP_200_OK)
+class GenreView(APIView):
+    def get(self, request):
+        genres = Genre.objects.all()
+        serializer = GenreSerializer(genres, many=True)
+        return Response(serializer.data)
 
-    if request.method == "POST":
-        serializer = MovieSerializer(data=request.data)
+    def post(self, request):
+        serializer = GenreSerializer(data=request.data)
         if serializer.is_valid():
             serializer.save()
             return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+
+class GenreDetailView(APIView):
+    def get(self, request, pk):
+        genre = get_object_or_404(Genre, pk=pk)
+        serializer = GenreSerializer(genre)
+        return Response(serializer.data)
 
+    def put(self, request, pk):
+        genre = get_object_or_404(Genre, pk=pk)
+        serializer = GenreSerializer(genre, data=request.data)
+        if serializer.is_valid():
+            serializer.save()
+            return Response(serializer.data)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
+    def delete(self, request, pk):
+        genre = get_object_or_404(Genre, pk=pk)
+        genre.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+
+class ActorListCreateView(ListCreateAPIView):
+    queryset = Actor.objects.all()
+    serializer_class = ActorSerializer
+
 
-@api_view(["GET", "PUT", "DELETE"])
-def movie_detail(request, pk):
-    movie = get_object_or_404(Movie, pk=pk)
+class ActorDetailView(RetrieveUpdateDestroyAPIView):
+    queryset = Actor.objects.all()
+    serializer_class = ActorSerializer
 
-    if request.method == "GET":
-        serializer = MovieSerializer(movie)
-        return Response(serializer.data, status=status.HTTP_200_OK)
 
-    if request.method == "PUT":
-        serializer = MovieSerializer(movie, data=request.data)
+class CinemaHallViewSet(viewsets.GenericViewSet):
+    queryset = CinemaHall.objects.all()
+    serializer_class = CinemaHallSerializer
+
+    def list(self, request):
+        queryset = self.get_queryset()
+        serializer = self.get_serializer(queryset, many=True)
+        return Response(serializer.data)
+
+    def create(self, request):
+        serializer = self.get_serializer(data=request.data)
         if serializer.is_valid():
             serializer.save()
-            return Response(serializer.data, status=status.HTTP_200_OK)
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    def retrieve(self, request, pk=None):
+        instance = get_object_or_404(self.get_queryset(), pk=pk)
+        serializer = self.get_serializer(instance)
+        return Response(serializer.data)
 
+    def update(self, request, pk=None):
+        instance = get_object_or_404(self.get_queryset(), pk=pk)
+        serializer = self.get_serializer(instance, data=request.data)
+        if serializer.is_valid():
+            serializer.save()
+            return Response(serializer.data)
         return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
-    if request.method == "DELETE":
-        movie.delete()
+    def destroy(self, request, pk=None):
+        instance = get_object_or_404(self.get_queryset(), pk=pk)
+        instance.delete()
         return Response(status=status.HTTP_204_NO_CONTENT)
+
+
+# Movie View using ModelViewSet and routers
+class MovieViewSet(viewsets.ModelViewSet):
+    queryset = Movie.objects.all()
+    serializer_class = MovieSerializer