Solution

db/migrations/0002_cinemahall_movie_moviesession.py

@@ -0,0 +1,42 @@
+# Generated by Django 4.0.2 on 2025-01-11 15:20
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0001_initial'),
+    ]
+
+    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='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(to='db.Actor')),
+                ('genres', models.ManyToManyField(to='db.Genre')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='MovieSession',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('show_time', models.DateTimeField(auto_now_add=True)),
+                ('cinema_hall', models.ForeignKey(on_delete=django.db.models.deletion.DO_NOTHING, to='db.cinemahall')),
+                ('movie', models.ForeignKey(on_delete=django.db.models.deletion.DO_NOTHING, to='db.movie')),
+            ],
+        ),
+    ]

db/migrations/0003_alter_cinemahall_rows_alter_cinemahall_seats_in_row_and_more.py

@@ -0,0 +1,28 @@
+# Generated by Django 4.0.2 on 2025-01-11 15:16
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0002_cinemahall_movie_moviesession'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='cinemahall',
+            name='rows',
+            field=models.IntegerField(),
+        ),
+        migrations.AlterField(
+            model_name='cinemahall',
+            name='seats_in_row',
+            field=models.IntegerField(),
+        ),
+        migrations.AlterField(
+            model_name='moviesession',
+            name='show_time',
+            field=models.DateTimeField(),
+        ),
+    ]

db/migrations/0004_alter_moviesession_cinema_hall_and_more.py

@@ -0,0 +1,24 @@
+# Generated by Django 4.0.2 on 2025-01-11 15:30
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('db', '0003_alter_cinemahall_rows_alter_cinemahall_seats_in_row_and_more'),
+    ]
+
+    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 +14,43 @@ 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(Actor)
+    genres = models.ManyToManyField(Genre)
+
+    def __str__(self) -> str:
+        return self.title
+
+
+class CinemaHall(models.Model):
+    name = models.CharField(max_length=255)
+    rows = models.IntegerField()
+    seats_in_row = models.IntegerField()
+
+    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(
+        CinemaHall,
+        on_delete=models.CASCADE,
+        related_name="cinema_halls"
+    )
+    movie = models.ForeignKey(
+        Movie,
+        on_delete=models.CASCADE,
+        related_name="movie_sessions"
+    )
+
+    def __str__(self) -> str:
+        return f"{self.movie.title} {self.show_time}"

services/cinema_hall.py

@@ -0,0 +1,20 @@
+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
+) -> CinemaHall:
+
+    return CinemaHall.objects.create(
+        name=hall_name,
+        rows=hall_rows,
+        seats_in_row=hall_seats_in_row
+    )

services/movie.py

@@ -0,0 +1,39 @@
+from django.db.models import QuerySet
+
+from db.models import Movie
+
+
+def get_movies(
+        genres_ids: list[int] = None,
+        actors_ids: list[int] = None
+) -> QuerySet:
+
+    if genres_ids and actors_ids:
+        return Movie.objects.filter(genres__id__in=genres_ids,
+                                    actors__id__in=actors_ids)
+    if genres_ids:
+        return Movie.objects.filter(genres__id__in=genres_ids)
+    if actors_ids:
+        return Movie.objects.filter(actors__id__in=actors_ids)
+    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: list[int] = None,
+        actors_ids: list[int] = None
+) -> Movie:
+    new_movie = Movie.objects.create(
+        title=movie_title,
+        description=movie_description
+    )
+    if genres_ids:
+        new_movie.genres.set(genres_ids)
+    if actors_ids:
+        new_movie.actors.set(actors_ids)
+    return new_movie

services/movie_session.py

@@ -0,0 +1,48 @@
+from django.db.models import QuerySet
+from datetime import datetime
+from db.models import Movie, CinemaHall, MovieSession
+
+
+def create_movie_session(
+        movie_show_time: datetime,
+        movie_id: int, cinema_hall_id: int
+) -> MovieSession:
+
+    return MovieSession.objects.create(
+        show_time=movie_show_time,
+        cinema_hall_id=cinema_hall_id,
+        movie_id=movie_id
+    )
+
+
+def get_movies_sessions(session_date: str = None) -> QuerySet:
+    if session_date:
+        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: str = None,
+        movie_id: int = None,
+        cinema_hall_id: int = None
+) -> MovieSession:
+    session_to_update = MovieSession.objects.get(id=session_id)
+    if show_time:
+        session_to_update.show_time = show_time
+    if movie_id:
+        session_to_update.movie = Movie.objects.get(id=movie_id)
+    if cinema_hall_id:
+        session_to_update.cinema_hall = CinemaHall.objects.get(
+            id=cinema_hall_id
+        )
+    session_to_update.save()
+    return session_to_update
+
+
+def delete_movie_session_by_id(session_id: int) -> None:
+    MovieSession.objects.filter(id=session_id).delete()

settings.py

@@ -21,6 +21,6 @@
 
 USE_I18N = True
 
-USE_TZ = False
+USE_TZ = True
 
 INSTALLED_APPS = ("db",)