Solution

cinema/migrations/0002_actor_cinemahall_genre_alter_movie_duration_and_more.py

@@ -0,0 +1,76 @@
+# Generated by Django 4.1 on 2024-09-28 12:57
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("cinema", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Actor",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("first_name", models.CharField(max_length=255)),
+                ("last_name", models.CharField(max_length=255)),
+            ],
+        ),
+        migrations.CreateModel(
+            name="CinemaHall",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("name", models.CharField(max_length=255)),
+                ("rows", models.PositiveIntegerField()),
+                ("seats_in_row", models.PositiveIntegerField()),
+            ],
+        ),
+        migrations.CreateModel(
+            name="Genre",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("name", models.CharField(max_length=255, unique=True)),
+            ],
+        ),
+        migrations.AlterField(
+            model_name="movie",
+            name="duration",
+            field=models.PositiveIntegerField(),
+        ),
+        migrations.AddField(
+            model_name="movie",
+            name="actors",
+            field=models.ManyToManyField(to="cinema.actor"),
+        ),
+        migrations.AddField(
+            model_name="movie",
+            name="genres",
+            field=models.ManyToManyField(to="cinema.genre"),
+        ),
+    ]

cinema/models.py

@@ -1,10 +1,45 @@
 from django.db import models
 
 
+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 Genre(models.Model):
+    name = models.CharField(max_length=255, unique=True)
+
+    def __str__(self):
+        return self.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()
+    duration = models.PositiveIntegerField()
+    actors = models.ManyToManyField(Actor, related_name="movies")
+    genres = models.ManyToManyField(Genre, related_name="movies")
+
+    def save(self, *args, **kwargs):
+        super().save(*args, **kwargs)
+
+    def set_related_fields(self, actors=None, genres=None):
+        if actors is not None:
+            self.actors.set(actors)
+        if genres is not None:
+            self.genres.set(genres)
 
     def __str__(self):
         return self.title

cinema/serializers.py

@@ -1,24 +1,113 @@
 from rest_framework import serializers
 
-from cinema.models import Movie
+from cinema.models import Actor, Genre, CinemaHall, Movie
+
+
+class ActorSerializer(serializers.Serializer):
+    id = serializers.IntegerField(read_only=True)
+    first_name = serializers.CharField(max_length=100)
+    last_name = serializers.CharField(max_length=100)
+
+    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 GenreSerializer(serializers.Serializer):
+    id = serializers.IntegerField(read_only=True)
+    name = serializers.CharField(max_length=100)
+
+    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 CinemaHallSerializer(serializers.Serializer):
+    id = serializers.IntegerField(read_only=True)
+    name = serializers.CharField(max_length=100)
+    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):
     id = serializers.IntegerField(read_only=True)
     title = serializers.CharField(max_length=255)
     description = serializers.CharField()
     duration = serializers.IntegerField()
+    actors = ActorSerializer(many=True, required=False)
+    genres = GenreSerializer(many=True, required=False)
 
-    def create(self, validated_data):
-        return Movie.objects.create(**validated_data)
+    def create(self, validated_data: dict) -> Movie:
+        actors_data = validated_data.pop("actors", [])
+        genres_data = validated_data.pop("genres", [])
+        movie = Movie.objects.create(**validated_data)
 
-    def update(self, instance, validated_data):
-        instance.title = validated_data.get("title", instance.title)
+        if actors_data:
+            for actor_data in actors_data:
+                actor = Actor.objects.get(id=actor_data["id"])
+                movie.actors.add(actor)
+
+        if genres_data:
+            for genre_data in genres_data:
+                genre = Genre.objects.get(id=genre_data["id"])
+                movie.genres.add(genre)
+
+        return movie
+
+    def update(self, instance: Movie, validated_data: dict) -> Movie:
+        actors_data = validated_data.pop("actors", None)
+        genres_data = validated_data.pop("genres", None)
+
+        instance.title = validated_data.get(
+            "title", instance.title
+        )
         instance.description = validated_data.get(
             "description", instance.description
         )
-        instance.duration = validated_data.get("duration", instance.duration)
+        instance.duration = validated_data.get(
+            "duration",
+            instance.duration
+        )
 
-        instance.save()
+        if actors_data is not None:
+            instance.actors.clear()
+            for actor_data in actors_data:
+                actor = Actor.objects.get(id=actor_data["id"])
+                instance.actors.add(actor)
 
+        if genres_data is not None:
+            instance.genres.clear()
+            for genre_data in genres_data:
+                genre = Genre.objects.get(id=genre_data["id"])
+                instance.genres.add(genre)
+
+        instance.save()
         return instance

cinema/urls.py

@@ -1,10 +1,27 @@
-from django.urls import path
+from django.urls import path, include
+from rest_framework.routers import DefaultRouter
 
-from cinema.views import movie_list, movie_detail
+from cinema.views import (
+    movie_list,
+    movie_detail,
+    GenreList,
+    GenreDetail,
+    ActorList,
+    ActorDetail,
+    CinemaHallViewSet,
+    MovieViewSet,
+)
 
-urlpatterns = [
-    path("movies/", movie_list, name="movie-list"),
-    path("movies/<int:pk>/", movie_detail, name="movie-detail"),
-]
+router = DefaultRouter()
+router.register(r"cinema_halls", CinemaHallViewSet, basename="cinema_hall")
+router.register(r"movies", MovieViewSet)
 
 app_name = "cinema"
+
+urlpatterns = [
+    path("genres/", GenreList.as_view(), name="genre-list"),
+    path("genres/<int:pk>/", GenreDetail.as_view(), name="genre-detail"),
+    path("actors/", ActorList.as_view(), name="actor-list"),
+    path("actors/<int:pk>/", ActorDetail.as_view(), name="actor-detail"),
+    path("", include(router.urls)),
+]