Solution

db/migrations/0002_user_order_ticket_alter_movie_actors_and_more.py

@@ -0,0 +1,114 @@
+# Generated by Django 4.0.2 on 2023-12-13 17:32
+
+from django.conf import settings
+import django.contrib.auth.models
+import django.contrib.auth.validators
+from django.db import migrations, models
+import django.db.models.deletion
+import django.utils.timezone
+
+
+class Migration(migrations.Migration):
+
+ dependencies = [
+ ('auth', '0012_alter_user_first_name_max_length'),
+ ('db', '0001_initial'),
+ ]
+
+ operations = [
+ migrations.CreateModel(
+ name='User',
+ fields=[
+ ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+ ('password', models.CharField(max_length=128, verbose_name='password')),
+ ('last_login', models.DateTimeField(blank=True, null=True, verbose_name='last login')),
+ ('is_superuser', models.BooleanField(default=False, help_text='Designates that this user has all permissions without explicitly assigning them.', verbose_name='superuser status')),
+ ('username', models.CharField(error_messages={'unique': 'A user with that username already exists.'}, help_text='Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only.', max_length=150, unique=True, validators=[django.contrib.auth.validators.UnicodeUsernameValidator()], verbose_name='username')),
+ ('first_name', models.CharField(blank=True, max_length=150, verbose_name='first name')),
+ ('last_name', models.CharField(blank=True, max_length=150, verbose_name='last name')),
+ ('email', models.EmailField(blank=True, max_length=254, verbose_name='email address')),
+ ('is_staff', models.BooleanField(default=False, help_text='Designates whether the user can log into this admin site.', verbose_name='staff status')),
+ ('is_active', models.BooleanField(default=True, help_text='Designates whether this user should be treated as active. Unselect this instead of deleting accounts.', verbose_name='active')),
+ ('date_joined', models.DateTimeField(default=django.utils.timezone.now, verbose_name='date joined')),
+ ],
+ options={
+ 'verbose_name': 'user',
+ 'verbose_name_plural': 'users',
+ 'abstract': False,
+ },
+ managers=[
+ ('objects', django.contrib.auth.models.UserManager()),
+ ],
+ ),
+ migrations.CreateModel(
+ name='Order',
+ fields=[
+ ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+ ('created_at', models.DateTimeField(auto_now_add=True)),
+ ],
+ options={
+ 'ordering': ['-created_at'],
+ },
+ ),
+ migrations.CreateModel(
+ name='Ticket',
+ fields=[
+ ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+ ('row', models.IntegerField()),
+ ('seat', models.IntegerField()),
+ ],
+ ),
+ migrations.AlterField(
+ model_name='movie',
+ name='actors',
+ field=models.ManyToManyField(related_name='movies', to='db.Actor'),
+ ),
+ migrations.AlterField(
+ model_name='movie',
+ name='genres',
+ field=models.ManyToManyField(related_name='movies', to='db.Genre'),
+ ),
+ migrations.AlterField(
+ model_name='moviesession',
+ name='cinema_hall',
+ field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='movie_sessions', 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'),
+ ),
+ migrations.AddIndex(
+ model_name='movie',
+ index=models.Index(fields=['title'], name='db_movie_title_5d0841_idx'),
+ ),
+ migrations.AddField(
+ model_name='ticket',
+ name='movie_session',
+ field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.moviesession'),
+ ),
+ migrations.AddField(
+ model_name='ticket',
+ name='order',
+ field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='db.order'),
+ ),
+ migrations.AddField(
+ model_name='order',
+ name='user',
+ field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL),
+ ),
+ migrations.AddField(
+ model_name='user',
+ name='groups',
+ field=models.ManyToManyField(blank=True, help_text='The groups this user belongs to. A user will get all permissions granted to each of their groups.', related_name='user_set', related_query_name='user', to='auth.Group', verbose_name='groups'),
+ ),
+ migrations.AddField(
+ model_name='user',
+ name='user_permissions',
+ field=models.ManyToManyField(blank=True, help_text='Specific permissions for this user.', related_name='user_set', related_query_name='user', to='auth.Permission', verbose_name='user permissions'),
+ ),
+ migrations.AddConstraint(
+ model_name='ticket',
+ constraint=models.UniqueConstraint(fields=('movie_session', 'seat', 'row'), name='unique_ticket'),
+ ),
+ ]

db/models.py

@@ -1,4 +1,7 @@
+from django.contrib.auth.models import AbstractUser
+from django.core.exceptions import ValidationError
 from django.db import models
+from django.db.models import UniqueConstraint
 
 
 class Genre(models.Model):
@@ -22,6 +25,11 @@ class Movie(models.Model):
  actors = models.ManyToManyField(to=Actor, related_name="movies")
  genres = models.ManyToManyField(to=Genre, related_name="movies")
 
+ class Meta:
+ indexes = [
+ models.Index(fields=["title"])
+ ]
+
  def __str__(self) -> str:
  return self.title
 
@@ -50,3 +58,59 @@ class MovieSession(models.Model):
 
  def __str__(self) -> str:
  return f"{self.movie.title} {str(self.show_time)}"
+
+
+class User(AbstractUser):
+ pass
+
+
+class Order(models.Model):
+ created_at = models.DateTimeField(auto_now_add=True)
+ user = models.ForeignKey(to=User, on_delete=models.CASCADE)
+
+ class Meta:
+ ordering = ["-created_at"]
+
+ def __str__(self) -> str:
+ return str(self.created_at)
+
+
+class Ticket(models.Model):
+ movie_session = models.ForeignKey(to=MovieSession,
+ on_delete=models.CASCADE)
+ order = models.ForeignKey(to=Order,
+ on_delete=models.CASCADE)
+ row = models.IntegerField()
+ seat = models.IntegerField()
+
+ class Meta:
+ constraints = [
+ UniqueConstraint(fields=["movie_session", "seat", "row"],
+ name="unique_ticket")
+ ]
+
+ def __str__(self) -> str:
+ return f"{self.movie_session} (row: {self.row}, seat: {self.seat})"
+
+ def clean(self) -> None:
+ if not 0 < self.row <= self.movie_session.cinema_hall.rows:
+ raise ValidationError({
+ "row": f"row number must be in available range: "
+ "(1, rows): "
+ f"(1, {self.movie_session.cinema_hall.rows})"
+ })
+ if not 0 < self.seat <= self.movie_session.cinema_hall.seats_in_row:
+ raise ValidationError({
+ "seat": f"seat number must be in available range: "
+ "(1, seats_in_row): "
+ f"(1, {self.movie_session.cinema_hall.seats_in_row})"
+ })
+
+ def save(self, force_insert: bool = False,
+ force_update: bool = False,
+ using: bool = None,
+ update_fields: bool = None) -> None:
+ self.full_clean()
+ return super(Ticket, self).save(
+ force_insert, force_update, using, update_fields
+ )

services/movie.py

@@ -1,11 +1,13 @@
+from django.db import transaction
 from django.db.models import QuerySet
 
 from db.models import Movie
 
 
 def get_movies(
- genres_ids: list[int] = None,
- actors_ids: list[int] = None,
+ genres_ids: list[int] | None = None,
+ actors_ids: list[int] | None = None,
+ title: str | None = None
 ) -> QuerySet:
  queryset = Movie.objects.all()
 
@@ -15,18 +17,22 @@ def get_movies(
  if actors_ids:
  queryset = queryset.filter(actors__id__in=actors_ids)
 
+ if title:
+ queryset = queryset.filter(title__icontains=title)
+
  return queryset
 
 
 def get_movie_by_id(movie_id: int) -> Movie:
  return Movie.objects.get(id=movie_id)
 
 
+@transaction.atomic()
 def create_movie(
- movie_title: str,
- movie_description: str,
- genres_ids: list = None,
- actors_ids: list = None,
+  movie_title: str,
+  movie_description: str,
+  genres_ids: list | None = None,
+  actors_ids: list | None = None,
 ) -> Movie:
  movie = Movie.objects.create(
  title=movie_title,

services/movie_session.py

@@ -4,7 +4,7 @@
 
 
 def create_movie_session(
- movie_show_time: str, movie_id: int, cinema_hall_id: int
+  movie_show_time: str, movie_id: int, cinema_hall_id: int
 ) -> MovieSession:
  return MovieSession.objects.create(
  show_time=movie_show_time,
@@ -13,7 +13,7 @@ def create_movie_session(
  )
 
 
-def get_movies_sessions(session_date: str = None) -> QuerySet:
+def get_movies_sessions(session_date: str | None = None) -> QuerySet:
  queryset = MovieSession.objects.all()
  if session_date:
  queryset = queryset.filter(show_time__date=session_date)
@@ -25,10 +25,10 @@ def get_movie_session_by_id(movie_session_id: int) -> MovieSession:
 
 
 def update_movie_session(
- session_id: int,
- show_time: str = None,
- movie_id: int = None,
- cinema_hall_id: int = None,
+  session_id: int,
+  show_time: str | None = None,
+  movie_id: int | None = None,
+  cinema_hall_id: int | None = None,
 ) -> None:
  movie_session = MovieSession.objects.get(id=session_id)
  if show_time:
@@ -42,3 +42,14 @@ def update_movie_session(
 
 def delete_movie_session_by_id(session_id: int) -> None:
  MovieSession.objects.get(id=session_id).delete()
+
+
+def get_taken_seats(movie_session_id: int) -> list[dict]:
+ return [
+ {
+ "row": ticket.row,
+ "seat": ticket.seat
+ }
+ for ticket in MovieSession.objects.get
+ (id=movie_session_id).ticket_set.all()
+ ]

services/order.py

@@ -0,0 +1,37 @@
+from django.contrib.auth import get_user_model
+from django.db import transaction
+from django.db.models import QuerySet
+
+from db.models import Order, Ticket
+from services.movie_session import get_taken_seats, get_movie_session_by_id
+
+
+@transaction.atomic
+def create_order(
+ tickets: list[dict],
+ username: str,
+ date: str | None = None
+) -> None:
+ order = Order.objects.create(
+ user=get_user_model().objects.get(username=username)
+ )
+ if date:
+ order.created_at = date
+ order.save()
+
+ for ticket in tickets:
+ movie_session = ticket["movie_session"]
+ seat_data = dict(list(ticket.items())[:2])
+
+ if seat_data not in get_taken_seats(movie_session):
+ Ticket.objects.create(
+ movie_session=get_movie_session_by_id(movie_session),
+ order=order,
+ **seat_data
+ )
+
+
+def get_orders(username: str | None = None) -> QuerySet:
+ if username:
+ return Order.objects.filter(user__username=username)
+ return Order.objects.all()

services/user.py

@@ -0,0 +1,49 @@
+from django.contrib.auth import get_user_model
+
+
+def create_user(
+ username: str,
+ password: str,
+ email: str | None = None,
+ first_name: str | None = None,
+ last_name: str | None = None
+) -> None:
+ fields = {
+ field: value for field, value in [
+ ("username", username),
+ ("password", password),
+ ("email", email),
+ ("first_name", first_name),
+ ("last_name", last_name)
+ ] if value is not None
+ }
+
+ get_user_model().objects.create_user(**fields)
+
+
+def get_user(user_id: int) -> get_user_model():
+ return get_user_model().objects.get(id=user_id)
+
+
+def update_user(
+ user_id: int,
+ username: str | None = None,
+ password: str | None = None,
+ email: str | None = None,
+ first_name: str | None = None,
+ last_name: str | None = None
+) -> None:
+ user = get_user(user_id)
+
+ if username:
+ user.username = username
+ if password:
+ user.set_password(password)
+ if email:
+ user.email = email
+ if first_name:
+ user.first_name = first_name
+ if last_name:
+ user.last_name = last_name
+
+ user.save()

settings.py

@@ -25,4 +25,8 @@
 
 INSTALLED_APPS = [
  "db",
+ "django.contrib.auth",
+ "django.contrib.contenttypes"
 ]
+
+AUTH_USER_MODEL = "db.User"