Solution

cinema/migrations/0005_alter_movie_actors_alter_movie_genres_and_more.py

@@ -0,0 +1,41 @@
+# Generated by Django 4.0.4 on 2024-12-04 12:24
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+        ('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'),
+        ),
+        migrations.AlterField(
+            model_name='order',
+            name='user',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='orders', to=settings.AUTH_USER_MODEL),
+        ),
+    ]

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):
+        return f"{self.first_name} {self.last_name}"
+
     def __str__(self):
         return self.first_name + " " + self.last_name
 
@@ -35,8 +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"]
@@ -47,8 +51,16 @@ 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,
+        related_name="movie_sessions",
+        on_delete=models.CASCADE
+    )
+    cinema_hall = models.ForeignKey(
+        CinemaHall,
+        related_name="movie_sessions",
+        on_delete=models.CASCADE
+    )
 
     class Meta:
         ordering = ["-show_time"]
@@ -60,7 +72,9 @@ def __str__(self):
 class Order(models.Model):
     created_at = models.DateTimeField(auto_now_add=True)
     user = models.ForeignKey(
-        settings.AUTH_USER_MODEL, on_delete=models.CASCADE
+        settings.AUTH_USER_MODEL,
+        related_name="orders",
+        on_delete=models.CASCADE
     )
 
     def __str__(self):

cinema/serializers.py

@@ -1 +1,84 @@
-# write serializers here
+from rest_framework import serializers
+
+from cinema.models import (
+    Genre,
+    Actor,
+    CinemaHall,
+    Movie,
+    MovieSession
+)
+
+
+class GenreSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Genre
+        fields = ["id", "name"]
+
+
+class ActorSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = Actor
+        fields = ["id", "first_name", "last_name", "full_name"]
+
+
+class CinemaHallSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CinemaHall
+        fields = ["id", "name", "rows", "seats_in_row", "capacity"]
+
+
+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 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 = ["id", "show_time", "movie", "cinema_hall"]
+
+
+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(read_only=True)
+    cinema_hall = CinemaHallSerializer(read_only=True)

cinema/urls.py

@@ -1 +1,28 @@
-# write urls here
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
+
+from cinema.views import (
+    GenreViewSet,
+    ActorViewSet,
+    MovieViewSet,
+    CinemaHallViewSet,
+    MovieSessionViewSet,
+)
+
+
+router = DefaultRouter()
+router.register("genres", GenreViewSet, basename="genres")
+router.register("actors", ActorViewSet, basename="actors")
+router.register("cinema_halls", CinemaHallViewSet, basename="cinema_halls")
+router.register("movies", MovieViewSet, basename="movies")
+router.register(
+    "movie_sessions",
+    MovieSessionViewSet,
+    basename="movie_sessions"
+)
+
+urlpatterns = [
+    path("", include(router.urls)),
+]
+
+app_name = "cinema"

cinema/views.py

@@ -1 +1,69 @@
-# 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,
+    MovieRetrieveSerializer,
+    MovieSessionRetrieveSerializer,
+    MovieSessionListSerializer
+)
+
+
+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.all()
+
+    def get_queryset(self):
+        queryset = self.queryset
+        if self.action in ("list", "retrieve"):
+            queryset = queryset.prefetch_related("genres", "actors")
+        return queryset
+
+    def get_serializer_class(self):
+        if self.action == "list":
+            return MovieListSerializer
+        elif self.action == "retrieve":
+            return MovieRetrieveSerializer
+        return MovieSerializer
+
+
+class MovieSessionViewSet(viewsets.ModelViewSet):
+    queryset = MovieSession.objects.all()
+
+    def get_queryset(self):
+        queryset = self.queryset
+        if self.action in ("list", "retrieve"):
+            queryset = queryset.select_related("movie", "cinema_hall")
+        return queryset
+
+    def get_serializer_class(self):
+        if self.action == "list":
+            return MovieSessionListSerializer
+        if self.action == "retrieve":
+            return MovieSessionRetrieveSerializer
+        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", namespace="cinema"))
 ]