139 lines
3.6 KiB
Python
139 lines
3.6 KiB
Python
from datetime import timedelta
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from django.core.validators import MinValueValidator
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from django.db.models import (
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CASCADE,
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CharField,
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DateTimeField,
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FloatField,
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ForeignKey,
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IntegerField,
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Manager,
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Model,
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)
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from django.utils import timezone
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from films.models import Film
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class FilmSessionsManager(Manager):
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def nearest_timetable(self):
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current_datetime = timezone.now()
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end_datetime = current_datetime + timedelta(days=5)
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queryset = super().get_queryset()
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queryset = queryset.select_related('film')
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queryset = queryset.prefetch_related('film__genres', 'film__countries')
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queryset = queryset.filter(
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start_datetime__gte=current_datetime,
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start_datetime__lte=end_datetime,
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)
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return queryset.order_by(FilmSession.start_datetime.field.name)
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def all_timetable(self):
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current_datetime = timezone.now()
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queryset = super().get_queryset()
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queryset = queryset.select_related('film')
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queryset = queryset.prefetch_related('film__genres', 'film__countries')
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queryset = queryset.filter(start_datetime__gte=current_datetime)
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queryset = queryset.prefetch_related(FilmSession.film.field.name)
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return queryset.order_by(FilmSession.start_datetime.field.name)
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class Auditorium(Model):
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number = CharField(
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max_length=20,
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verbose_name='Номер кинозала',
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)
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def __str__(self):
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return self.number
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class Meta:
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db_table = 'timetable_auditoriums'
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verbose_name = 'Зал'
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verbose_name_plural = 'Залы'
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class Row(Model):
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row_number = IntegerField(
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verbose_name='Номер ряда',
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validators=[
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MinValueValidator(1),
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],
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)
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column_count = IntegerField(
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verbose_name='Количество кресел в ряду',
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validators=[
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MinValueValidator(1),
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],
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)
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auditorium = ForeignKey(
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Auditorium,
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on_delete=CASCADE,
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verbose_name='Зал',
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related_name='rows',
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related_query_name='rows',
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)
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class Meta:
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db_table = 'timetable_rows'
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verbose_name = 'Место'
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verbose_name_plural = 'Места'
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class FilmSession(Model):
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objects = FilmSessionsManager()
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start_datetime = DateTimeField(
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verbose_name='Дата и время начала сеанса',
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)
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end_datetime = DateTimeField(
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verbose_name='Дата и время окончания сеанса',
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blank=True,
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null=True,
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)
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price = FloatField(
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verbose_name='Цена билета',
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validators=[
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MinValueValidator(1),
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],
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)
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film = ForeignKey(
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Film,
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on_delete=CASCADE,
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verbose_name='Фильм',
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related_name='sessions',
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related_query_name='sessions',
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)
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auditorium = ForeignKey(
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Auditorium,
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on_delete=CASCADE,
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verbose_name='Зал',
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related_name='sessions',
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related_query_name='sessions',
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)
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def __str__(self):
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return (
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f'{self.film.name} - {str(self.start_datetime)}'
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f' - {self.auditorium}'
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)
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def save(self, *args, **kwargs):
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if self.start_datetime and self.film.duration:
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self.end_datetime = self.start_datetime + timedelta(
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minutes=self.film.duration,
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)
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super().save(*args, **kwargs)
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class Meta:
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db_table = 'timetable_film_sessions'
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verbose_name = 'Сеанс'
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verbose_name_plural = 'Сеансы'
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