implemented tickets and orders architecture

db/migrations/0002_user_order_ticket_alter_movie_actors_and_more.py

@@ -0,0 +1,114 @@
+# Generated by Django 4.0.2 on 2024-07-26 15:52
+
+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, related_name='tickets', to='db.moviesession'),
+ ),
+ migrations.AddField(
+ model_name='ticket',
+ name='order',
+ field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='tickets', to='db.order'),
+ ),
+ migrations.AddField(
+ model_name='order',
+ name='user',
+ field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='orders', 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', 'row', 'seat'), name='unique_movie_session_row_and_seat'),
+ ),
+ ]

db/models.py

@@ -1,4 +1,10 @@
+import datetime
+
+from django.conf import settings
+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 +28,9 @@ 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
 
@@ -42,11 +51,85 @@ def __str__(self) -> str:
 class MovieSession(models.Model):
  show_time = models.DateTimeField()
  cinema_hall = models.ForeignKey(
- to=CinemaHall, on_delete=models.CASCADE, related_name="movie_sessions"
+ to=CinemaHall,
+ on_delete=models.CASCADE,
+ related_name="movie_sessions"
  )
  movie = models.ForeignKey(
- to=Movie, on_delete=models.CASCADE, related_name="movie_sessions"
+ to=Movie,
+ on_delete=models.CASCADE,
+ related_name="movie_sessions"
  )
 
  def __str__(self) -> str:
  return f"{self.movie.title} {str(self.show_time)}"
+
+
+class Order(models.Model):
+ created_at = models.DateTimeField()
+ user = models.ForeignKey(
+ settings.AUTH_USER_MODEL,
+ on_delete=models.CASCADE,
+ related_name="orders"
+ )
+
+ class Meta:
+ ordering = ("-created_at",)
+
+ def save(self, **kwargs) -> None:
+ if not self.created_at:
+ self.created_at = datetime.datetime.now()
+
+ super(Order, self).save(**kwargs)
+
+ def __str__(self) -> str:
+ return self.created_at.strftime("%Y-%m-%d %H:%M:%S")
+
+
+class User(AbstractUser):
+ pass
+
+
+class Ticket(models.Model):
+ movie_session = models.ForeignKey(
+ to=MovieSession,
+ on_delete=models.CASCADE,
+ related_name="tickets"
+ )
+ order = models.ForeignKey(
+ to=Order,
+ on_delete=models.CASCADE,
+ related_name="tickets"
+ )
+ row = models.IntegerField()
+ seat = models.IntegerField()
+
+ class Meta:
+ constraints = [
+ UniqueConstraint(fields=["movie_session", "row", "seat"],
+ name="unique_movie_session_row_and_seat"),
+ ]
+
+ def clean(self) -> None:
+ cinema_hall = self.movie_session.cinema_hall
+ errors_dict = {}
+ if self.row > cinema_hall.rows:
+ errors_dict["row"] = [f"row number must be in available"
+ f" range: (1, rows): "
+ f"(1, {cinema_hall.rows})"]
+ raise ValidationError(errors_dict)
+
+ if self.seat > cinema_hall.seats_in_row:
+ errors_dict["seat"] = [f"seat number must be in available"
+ f" range: (1, seats_in_row): "
+ f"(1, {cinema_hall.seats_in_row})"]
+ raise ValidationError(errors_dict)
+
+ def save(self, **kwargs) -> None:
+ self.full_clean()
+ super().save(**kwargs)
+
+ def __str__(self) -> str:
+ movie_session = self.movie_session
+ return (f"{movie_session.movie.title} {movie_session.show_time}"
+ f" (row: {self.row}, seat: {self.seat})")

services/cinema_hall.py

@@ -9,7 +9,9 @@ def get_cinema_halls() -> QuerySet:
 
 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
+) -> None:
+ CinemaHall.objects.create(
+ name=hall_name,
+ rows=hall_rows,
+ seats_in_row=hall_seats_in_row
  )

services/movie.py

@@ -1,12 +1,14 @@
+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,
-) -> QuerySet:
+ genres_ids: list[int] | None = None,
+ actors_ids: list[int] | None = None,
+ title: str | None = None,
+) -> QuerySet[Movie]:
  queryset = Movie.objects.all()
 
  if genres_ids:
@@ -15,6 +17,9 @@ def get_movies(
  if actors_ids:
  queryset = queryset.filter(actors__id__in=actors_ids)
 
+ if title:
+ queryset = queryset.filter(title__icontains=title)
+
  return queryset
 
 
@@ -23,18 +28,17 @@ def get_movie_by_id(movie_id: int) -> Movie:
 
 
 def create_movie(
- movie_title: str,
- movie_description: str,
- genres_ids: list = None,
- actors_ids: list = None,
-) -> Movie:
- 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)
-
- return movie
+ movie_title: str,
+ movie_description: str,
+ genres_ids: list | None = None,
+ actors_ids: list | None = None,
+) -> None:
+ with transaction.atomic():
+ 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

@@ -1,19 +1,24 @@
 from django.db.models import QuerySet
+from django.db.models import F
 
 from db.models import MovieSession
 
 
 def create_movie_session(
- movie_show_time: str, movie_id: int, cinema_hall_id: int
-) -> MovieSession:
- return MovieSession.objects.create(
+ movie_show_time: str,
+ movie_id: int,
+ cinema_hall_id: int
+) -> None:
+ MovieSession.objects.create(
  show_time=movie_show_time,
  movie_id=movie_id,
  cinema_hall_id=cinema_hall_id,
  )
 
 
-def get_movies_sessions(session_date: str = None) -> QuerySet:
+def get_movies_sessions(
+ session_date: str | None = None
+) -> QuerySet[MovieSession]:
  queryset = MovieSession.objects.all()
  if session_date:
  queryset = queryset.filter(show_time__date=session_date)
@@ -25,10 +30,10 @@ 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:
@@ -41,4 +46,10 @@ def update_movie_session(
 
 
 def delete_movie_session_by_id(session_id: int) -> None:
- MovieSession.objects.get(id=session_id).delete()
+ get_movie_session_by_id(session_id).delete()
+
+
+def get_taken_seats(movie_session_id: int) -> list[dict]:
+ return list(MovieSession.objects.filter(pk=movie_session_id)
+ .prefetch_related("tickets")
+ .values(row=F("tickets__row"), seat=F("tickets__seat")))

services/order.py

@@ -0,0 +1,36 @@
+import datetime
+
+from django.db import transaction
+from django.db.models import QuerySet
+
+from db.models import Order, Ticket
+from services.user import get_user_by_username
+
+
+def create_order(
+ tickets: list[dict],
+ username: str,
+ date: str | None = None
+) -> None:
+ user = get_user_by_username(username)
+ with transaction.atomic():
+ if date:
+ date_from_str = datetime.datetime.strptime(date, "%Y-%m-%d %H:%M")
+ order = Order.objects.create(created_at=date_from_str, user=user)
+ else:
+ order = Order.objects.create(user=user)
+
+ for ticket in tickets:
+ Ticket.objects.create(
+ row=ticket["row"],
+ seat=ticket["seat"],
+ movie_session_id=ticket["movie_session"],
+ order=order
+ )
+
+
+def get_orders(username: str | None = None) -> QuerySet[Order]:
+ if username:
+ return Order.objects.filter(user__username=username)
+
+ return Order.objects.all()