first

cinema/migrations/0005_alter_movie_actors_alter_movie_genres_and_more.py

@@ -0,0 +1,34 @@
+# Generated by Django 4.1 on 2024-10-02 16:55
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cinema', '0004_alter_genre_name'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='movie',
+            name='actors',
+            field=models.ManyToManyField(related_name='movies', to='cinema.actor'),
+        ),
+        migrations.AlterField(
+            model_name='movie',
+            name='genres',
+            field=models.ManyToManyField(related_name='movies', to='cinema.genre'),
+        ),
+        migrations.AlterField(
+            model_name='moviesession',
+            name='cinema_hall',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='movie_sessions', to='cinema.cinemahall'),
+        ),
+        migrations.AlterField(
+            model_name='moviesession',
+            name='movie',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='movie_sessions', to='cinema.movie'),
+        ),
+    ]

cinema/models.py

@@ -39,8 +39,8 @@ class Movie(models.Model):
     title = models.CharField(max_length=255)
     description = models.TextField()
     duration = models.IntegerField()
-    genres = models.ManyToManyField(Genre)
-    actors = models.ManyToManyField(Actor)
+    genres = models.ManyToManyField(Genre, related_name="movies")
+    actors = models.ManyToManyField(Actor, related_name="movies")
 
     class Meta:
         ordering = ["title"]
@@ -51,8 +51,12 @@ def __str__(self):
 
 class MovieSession(models.Model):
     show_time = models.DateTimeField()
-    movie = models.ForeignKey(Movie, on_delete=models.CASCADE)
-    cinema_hall = models.ForeignKey(CinemaHall, on_delete=models.CASCADE)
+    movie = models.ForeignKey(
+        Movie, on_delete=models.CASCADE, related_name="movie_sessions"
+    )
+    cinema_hall = models.ForeignKey(
+        CinemaHall, on_delete=models.CASCADE, related_name="movie_sessions"
+    )
 
     class Meta:
         ordering = ["-show_time"]

cinema/serializers.py

@@ -1,6 +1,16 @@
+from django.db import transaction
 from rest_framework import serializers
+from rest_framework.fields import SerializerMethodField
 
-from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession
+from cinema.models import (
+    Genre,
+    Actor,
+    CinemaHall,
+    Movie,
+    MovieSession,
+    Order,
+    Ticket
+)
 
 
 class GenreSerializer(serializers.ModelSerializer):
@@ -59,6 +69,7 @@ class MovieSessionListSerializer(MovieSessionSerializer):
     cinema_hall_capacity = serializers.IntegerField(
         source="cinema_hall.capacity", read_only=True
     )
+    tickets_available = serializers.IntegerField(read_only=True)
 
     class Meta:
         model = MovieSession
@@ -68,13 +79,49 @@ class Meta:
             "movie_title",
             "cinema_hall_name",
             "cinema_hall_capacity",
+            "tickets_available",
         )
 
 
 class MovieSessionDetailSerializer(MovieSessionSerializer):
     movie = MovieListSerializer(many=False, read_only=True)
     cinema_hall = CinemaHallSerializer(many=False, read_only=True)
+    taken_places = SerializerMethodField()
 
     class Meta:
         model = MovieSession
-        fields = ("id", "show_time", "movie", "cinema_hall")
+        fields = ("id", "show_time", "movie", "cinema_hall", "taken_places")
+
+    def get_taken_places(self, movie_session):
+        return [{"row": ticket.row, "seat": ticket.seat}
+                for ticket in movie_session.tickets.all()]
+
+
+class TicketSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Ticket
+        fields = ("id", "row", "seat", "movie_session")
+
+
+class TicketRetrieveSerializer(TicketSerializer):
+    movie_session = MovieSessionListSerializer(many=False, read_only=True)
+
+
+class OrderSerializer(serializers.ModelSerializer):
+    tickets = TicketSerializer(many=True, read_only=False, allow_empty=False)
+
+    class Meta:
+        model = Order
+        fields = ("id", "tickets", "created_at")
+
+    def create(self, validated_data):
+        with transaction.atomic():
+            tickets_data = validated_data.pop("tickets")
+            order = Order.objects.create(**validated_data)
+            for ticket_data in tickets_data:
+                Ticket.objects.create(order=order, **ticket_data)
+            return order
+
+
+class OrderListSerializer(OrderSerializer):
+    tickets = TicketRetrieveSerializer(many=True, read_only=True)

cinema/urls.py

@@ -7,6 +7,7 @@
     CinemaHallViewSet,
     MovieViewSet,
     MovieSessionViewSet,
+    OrderViewSet,
 )
 
 router = routers.DefaultRouter()
@@ -15,6 +16,8 @@
 router.register("cinema_halls", CinemaHallViewSet)
 router.register("movies", MovieViewSet)
 router.register("movie_sessions", MovieSessionViewSet)
+router.register("orders", OrderViewSet)
+
 
 urlpatterns = [path("", include(router.urls))]
 

cinema/views.py

@@ -1,6 +1,8 @@
+from django.db.models import F, Count
 from rest_framework import viewsets
+from rest_framework.pagination import PageNumberPagination
 
-from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession
+from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession, Order
 
 from cinema.serializers import (
     GenreSerializer,
@@ -12,6 +14,8 @@
     MovieDetailSerializer,
     MovieSessionDetailSerializer,
     MovieListSerializer,
+    OrderSerializer,
+    OrderListSerializer,
 )
 
 
@@ -34,25 +38,81 @@ class MovieViewSet(viewsets.ModelViewSet):
     queryset = Movie.objects.all()
     serializer_class = MovieSerializer
 
+    def get_queryset(self):
+        queryset = self.queryset.prefetch_related("genres", "actors")
+        actors = self.request.query_params.get("actors")
+        genres = self.request.query_params.get("genres")
+        title = self.request.query_params.get("title")
+        if genres:
+            genres_ids = [int(str_id) for str_id in genres.split(",")]
+            queryset = queryset.filter(genres__id__in=genres_ids)
+        if actors:
+            actors_ids = [int(str_id) for str_id in actors.split(",")]
+            queryset = queryset.filter(actors__id__in=actors_ids)
+        if title:
+            queryset = queryset.filter(title__icontains=title)
+        return queryset.distinct()
+
     def get_serializer_class(self):
         if self.action == "list":
             return MovieListSerializer
-
         if self.action == "retrieve":
             return MovieDetailSerializer
-
         return MovieSerializer
 
 
 class MovieSessionViewSet(viewsets.ModelViewSet):
     queryset = MovieSession.objects.all()
     serializer_class = MovieSessionSerializer
 
+    def get_queryset(self):
+        queryset = self.queryset.select_related("movie", "cinema_hall")
+        date = self.request.query_params.get("date")
+        movie = self.request.query_params.get("movie")
+        if date:
+            queryset = queryset.filter(show_time__date=date)
+        if movie:
+            queryset = queryset.filter(movie=movie)
+
+        queryset = queryset.annotate(
+            tickets_available=(
+                F("cinema_hall__rows")
+                * F("cinema_hall__seats_in_row")
+                - Count("tickets")
+            )
+        )
+        return queryset.distinct()
+
     def get_serializer_class(self):
         if self.action == "list":
             return MovieSessionListSerializer
-
         if self.action == "retrieve":
             return MovieSessionDetailSerializer
-
         return MovieSessionSerializer
+
+
+class OrderSetPagination(PageNumberPagination):
+    page_size = 1
+    page_size_query_param = "page_size"
+    max_page_size = 3
+
+
+class OrderViewSet(viewsets.ModelViewSet):
+    queryset = Order.objects.all()
+    serializer_class = OrderSerializer
+    pagination_class = OrderSetPagination
+
+    def get_queryset(self):
+        queryset = self.queryset.filter(user=self.request.user)
+        if self.action == "list":
+            queryset = queryset.prefetch_related("tickets__movie_session")
+        return queryset
+
+    def perform_create(self, serializer):
+        serializer.save(user=self.request.user)
+
+    def get_serializer_class(self):
+        serializer = self.serializer_class
+        if self.action == "list":
+            serializer = OrderListSerializer
+        return serializer

cinema_service/settings.py

@@ -124,7 +124,7 @@
 
 USE_I18N = True
 
-USE_TZ = False
+USE_TZ = True
 
 
 # Static files (CSS, JavaScript, Images)