Develop

cinema/serializers.py

@@ -1,6 +1,16 @@
+from django.db import transaction
 from rest_framework import serializers
+from rest_framework.generics import get_object_or_404
 
-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 +79,63 @@ class Meta:
             "movie_title",
             "cinema_hall_name",
             "cinema_hall_capacity",
+            "tickets_available",
         )
 
 
+class TicketTakenSeatsSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Ticket
+        fields = ["row", "seat"]
+
+
 class MovieSessionDetailSerializer(MovieSessionSerializer):
     movie = MovieListSerializer(many=False, read_only=True)
     cinema_hall = CinemaHallSerializer(many=False, read_only=True)
+    taken_places = TicketTakenSeatsSerializer(
+        source="tickets",
+        many=True,
+        read_only=True
+    )
 
     class Meta:
         model = MovieSession
-        fields = ("id", "show_time", "movie", "cinema_hall")
+        fields = ("id", "show_time", "movie", "cinema_hall", "taken_places")
+
+
+class TicketListSerializer(serializers.ModelSerializer):
+    movie_session = MovieSessionListSerializer(read_only=True)
+
+    class Meta:
+        model = Ticket
+        fields = ["id", "row", "seat", "movie_session"]
+
+
+class OrderListSerializer(serializers.ModelSerializer):
+    tickets = TicketListSerializer(many=True)
+
+    class Meta:
+        model = Order
+        fields = ["tickets", "created_at"]
+
+
+class TicketCreateSerializer(TicketListSerializer):
+    movie_session = serializers.PrimaryKeyRelatedField(
+        queryset=MovieSession.objects.all()
+    )
+
+
+class OrderCreateSerializer(OrderListSerializer):
+    tickets = TicketCreateSerializer(many=True)
+
+    @transaction.atomic
+    def create(self, validated_data):
+        tickets_data = validated_data.pop("tickets")
+
+        order = Order.objects.create(**validated_data)
+        tickets = [
+            Ticket(order=order, **ticket_data)
+            for ticket_data in tickets_data
+        ]
+        Ticket.objects.bulk_create(tickets)
+        return order

cinema/urls.py

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

cinema/views.py

@@ -1,6 +1,15 @@
+from django.db.models import F, Count
 from rest_framework import viewsets
-
-from cinema.models import Genre, Actor, CinemaHall, Movie, MovieSession
+from rest_framework.pagination import PageNumberPagination
+
+from cinema.models import (
+    Genre,
+    Actor,
+    CinemaHall,
+    Movie,
+    MovieSession,
+    Order
+)
 
 from cinema.serializers import (
     GenreSerializer,
@@ -12,6 +21,7 @@
     MovieDetailSerializer,
     MovieSessionDetailSerializer,
     MovieListSerializer,
+    OrderListSerializer, OrderCreateSerializer,
 )
 
 
@@ -34,6 +44,24 @@ class MovieViewSet(viewsets.ModelViewSet):
     queryset = Movie.objects.all()
     serializer_class = MovieSerializer
 
+    def get_queryset(self):
+        queryset = self.queryset
+        actors = self.request.query_params.get("actors")
+        genres = self.request.query_params.get("genres")
+        title = self.request.query_params.get("title")
+        if actors:
+            actors_ids = [int(str_id) for str_id in actors.split(",")]
+            queryset = Movie.objects.filter(actors__id__in=actors_ids)
+        elif genres:
+            genres_ids = [int(str_id) for str_id in genres.split(",")]
+            queryset = Movie.objects.filter(genres__id__in=genres_ids)
+        elif title:
+            queryset = Movie.objects.filter(title__contains=title)
+        if self.action == ("list", "retrieve"):
+            queryset = Movie.objects.prefetch_related("genres", "actors")
+            return queryset
+        return queryset.prefetch_related("genres", "actors")
+
     def get_serializer_class(self):
         if self.action == "list":
             return MovieListSerializer
@@ -48,6 +76,26 @@ class MovieSessionViewSet(viewsets.ModelViewSet):
     queryset = MovieSession.objects.all()
     serializer_class = MovieSessionSerializer
 
+    def get_queryset(self):
+        queryset = self.queryset
+        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_id=movie)
+        if self.action == "list":
+            queryset = (
+                queryset
+                .select_related("movie", "cinema_hall")
+                .annotate(
+                    tickets_available=F("cinema_hall__rows")
+                    * F("cinema_hall__seats_in_row")
+                    - Count("tickets"))
+            ).order_by("id")
+            return queryset
+        return queryset
+
     def get_serializer_class(self):
         if self.action == "list":
             return MovieSessionListSerializer
@@ -56,3 +104,31 @@ def get_serializer_class(self):
             return MovieSessionDetailSerializer
 
         return MovieSessionSerializer
+
+
+class OrderSetPagination(PageNumberPagination):
+    page_size = 1
+    page_size_query_param = "page_size"
+    max_page_size = 1
+
+
+class OrderViewSet(viewsets.ModelViewSet):
+    queryset = Order.objects.all()
+    pagination_class = OrderSetPagination
+
+    def get_queryset(self):
+        queryset = self.queryset.filter(user=self.request.user)
+        if self.action == "list":
+            return queryset.prefetch_related(
+                "tickets__movie_session__movie",
+                "tickets__movie_session__cinema_hall"
+            )
+        return queryset
+
+    def perform_create(self, serializer):
+        serializer.save(user=self.request.user)
+
+    def get_serializer_class(self):
+        if self.action == "create":
+            return OrderCreateSerializer
+        return OrderListSerializer

cinema_service/settings.py

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