Solution

db/migrations/0002_movie.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.0.2 on 2025-01-09 14:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Movie',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=255)),
+                ('description', models.TextField()),
+                ('actors', models.ManyToManyField(related_name='movies', to='db.Actor')),
+                ('genres', models.ManyToManyField(related_name='movies', to='db.Genre')),
+            ],
+        ),
+    ]

db/migrations/0003_cinemahall_moviesession.py

@@ -0,0 +1,32 @@
+# Generated by Django 4.0.2 on 2025-01-09 14:27
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0002_movie'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='CinemaHall',
+            fields=[
+                ('id', models.AutoField(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='MovieSession',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('show_time', models.DateTimeField()),
+                ('cinema_hall', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.cinemahall')),
+                ('movie', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.movie')),
+            ],
+        ),
+    ]

db/migrations/0004_alter_moviesession_cinema_hall_and_more.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.0.2 on 2025-01-09 14:48
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0003_cinemahall_moviesession'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='moviesession',
+            name='cinema_hall',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='cinema_halls', to='db.cinemahall'),
+        ),
+        migrations.AlterField(
+            model_name='moviesession',
+            name='movie',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='movie_sessions', to='db.movie'),
+        ),
+    ]

db/models.py

@@ -14,3 +14,49 @@ class Actor(models.Model):
 
     def __str__(self) -> str:
         return f"{self.first_name} {self.last_name}"
+
+
+class Movie(models.Model):
+    title = models.CharField(max_length=255)
+    description = models.TextField()
+    actors = models.ManyToManyField(
+        "db.Actor",
+        related_name="movies"
+    )
+    genres = models.ManyToManyField(
+        "db.Genre",
+        related_name="movies"
+    )
+
+    def __str__(self) -> str:
+        return self.title
+
+
+class CinemaHall(models.Model):
+    name = models.CharField(max_length=255)
+    rows = models.PositiveIntegerField()
+    seats_in_row = models.PositiveIntegerField()
+
+    def __str__(self) -> str:
+        return self.name
+
+    @property
+    def capacity(self) -> int:
+        return self.rows * self.seats_in_row
+
+
+class MovieSession(models.Model):
+    show_time = models.DateTimeField()
+    cinema_hall = models.ForeignKey(
+        "db.CinemaHall",
+        on_delete=models.CASCADE,
+        related_name="cinema_halls"
+    )
+    movie = models.ForeignKey(
+        "db.Movie",
+        on_delete=models.CASCADE,
+        related_name="movie_sessions"
+    )
+
+    def __str__(self) -> str:
+        return f"{str(self.movie)} {self.show_time}"

services/cinema_hall.py

@@ -0,0 +1,19 @@
+from django.db.models import QuerySet
+
+from db.models import CinemaHall
+
+
+def get_cinema_halls() -> QuerySet:
+    return CinemaHall.objects.all()
+
+
+def create_cinema_hall(
+        hall_name: str,
+        hall_rows: int,
+        hall_seats_in_row: int
+) -> None:
+    CinemaHall.objects.create(
+        name=hall_name,
+        rows=hall_rows,
+        seats_in_row=hall_seats_in_row
+    )

services/movie.py

@@ -0,0 +1,46 @@
+from typing import Optional
+
+from django.db.models import QuerySet
+
+from db.models import Movie
+
+
+def get_movies(
+        genres_ids: Optional[list[int]] = None,
+        actors_ids: Optional[list[int]] = None
+) -> QuerySet:
+    if genres_ids and actors_ids:
+        return Movie.objects.filter(
+            genres__id__in=genres_ids
+        ).filter(
+            actors__id__in=actors_ids
+        ).distinct()
+
+    if genres_ids:
+        return Movie.objects.filter(genres__id__in=genres_ids).distinct()
+
+    if actors_ids:
+        return Movie.objects.filter(actors__id__in=actors_ids).distinct()
+
+    return Movie.objects.all()
+
+
+def get_movie_by_id(movie_id: int) -> Movie:
+    return Movie.objects.get(id=movie_id)
+
+
+def create_movie(
+        movie_title: str,
+        movie_description: str,
+        genres_ids: Optional[list[int]] = None,
+        actors_ids: Optional[list[int]] = None
+) -> None:
+    movie = Movie.objects.create(
+        title=movie_title,
+        description=movie_description
+    )
+    if genres_ids:
+        movie.genres.set(genres_ids)
+
+    if actors_ids:
+        movie.actors.set(actors_ids)

services/movie_session.py

@@ -0,0 +1,53 @@
+import datetime
+from typing import Optional
+
+from django.db.models import QuerySet
+
+from db.models import MovieSession
+
+
+def create_movie_session(
+        movie_show_time: datetime.datetime,
+        movie_id: int,
+        cinema_hall_id: int
+) -> None:
+    MovieSession.objects.create(
+        show_time=movie_show_time,
+        cinema_hall_id=cinema_hall_id,
+        movie_id=movie_id
+    )
+
+
+def get_movies_sessions(session_date: Optional[str] = None) -> QuerySet:
+    if session_date:
+        session_date = datetime.datetime.strptime(session_date, "%Y-%m-%d")
+        return MovieSession.objects.filter(show_time__date=session_date)
+    return MovieSession.objects.all()
+
+
+def get_movie_session_by_id(movie_session_id: int) -> MovieSession:
+    return MovieSession.objects.get(id=movie_session_id)
+
+
+def update_movie_session(
+        session_id: int,
+        show_time: Optional[datetime.datetime] = None,
+        movie_id: Optional[int] = None,
+        cinema_hall_id: Optional[int] = None
+) -> None:
+    ms = get_movie_session_by_id(session_id)
+
+    if show_time:
+        ms.show_time = show_time
+
+    if movie_id:
+        ms.movie_id = movie_id
+
+    if cinema_hall_id:
+        ms.cinema_hall_id = cinema_hall_id
+
+    ms.save()
+
+
+def delete_movie_session_by_id(session_id: int) -> None:
+    get_movie_session_by_id(session_id).delete()