Source code for pretalx.schedule.models.slot

from datetime import datetime, timedelta
from urllib.parse import urlparse

import pytz
from django.db import models
from django.utils.functional import cached_property
from django.utils.translation import ugettext_lazy as _
from django_scopes import ScopedManager

from pretalx.common.mixins import LogMixin
from pretalx.common.urls import get_base_url

[docs]class TalkSlot(LogMixin, models.Model): """The TalkSlot object is the scheduled version of a :class:`~pretalx.submission.models.submission.Submission`. TalkSlots always belong to one submission and one :class:`~pretalx.schedule.models.schedule.Schedule`. :param is_visible: This parameter is set on schedule release. Only confirmed talks will be visible. """ submission = models.ForeignKey( to='submission.Submission', on_delete=models.PROTECT, related_name='slots' ) room = models.ForeignKey( to='schedule.Room', on_delete=models.PROTECT, related_name='talks', null=True, blank=True, ) schedule = models.ForeignKey( to='schedule.Schedule', on_delete=models.PROTECT, related_name='talks' ) is_visible = models.BooleanField(default=False) start = models.DateTimeField(null=True) end = models.DateTimeField(null=True) objects = ScopedManager(event='submission__event') def __str__(self): """Help when debugging.""" return f'TalkSlot(event={self.submission.event.slug}, submission={self.submission.title}, schedule={self.schedule.version})' @cached_property def event(self): return self.submission.event @cached_property def duration(self) -> int: """Returns the actual duration in minutes if the talk is scheduled, and the planned duration in minutes otherwise.""" if self.start and self.end: return int((self.end - self.start).total_seconds() / 60) return self.submission.get_duration() @cached_property def export_duration(self): from pretalx.common.serialize import serialize_duration return serialize_duration(minutes=self.duration) @cached_property def pentabarf_export_duration(self): duration = timedelta(minutes=self.duration) days = duration.days hours = duration.total_seconds() // 3600 - days * 24 minutes = duration.seconds // 60 % 60 return f'{hours:02}{minutes:02}00' @cached_property def real_end(self): """Guaranteed to provide a useful end datetime if ``start`` is set, even if ``end`` is empty.""" return self.end or ( self.start + timedelta(minutes=self.duration) if self.start else None ) @cached_property def as_availability(self): """ 'Casts' a slot as :class:`~pretalx.schedule.models.availability.Availability`, useful for availability arithmetics. """ from pretalx.schedule.models import Availability return Availability( start=self.start, end=self.real_end, event=self.submission.event ) @cached_property def warnings(self) -> list: """A list of warnings that apply to this slot. Warnings are dictionaries with a ``type`` (``room`` or ``speaker``, for now) and a ``message`` fit for public display. This property only shows availability based warnings. """ if not self.start: return [] warnings = [] availability = self.as_availability if if not any( room_availability.contains(availability) for room_availability in ): warnings.append( { 'type': 'room', 'message': _( 'The room is not available at the scheduled time.' ), } ) for speaker in self.submission.speakers.all(): profile = speaker.event_profile(event=self.submission.event) if profile.availabilities.exists() and not any( speaker_availability.contains(availability) for speaker_availability in profile.availabilities.all() ): warnings.append( { 'type': 'speaker', 'speaker': { 'name': speaker.get_display_name(), 'id':, }, 'message': _( 'A speaker is not available at the scheduled time.' ), } ) return warnings
[docs] def copy_to_schedule(self, new_schedule, save=True): """Create a new slot for the given :class:`~pretalx.schedule.models.schedule.Schedule` with all other fields identical to this one.""" new_slot = TalkSlot(schedule=new_schedule) for field in [f for f in self._meta.fields if not in ('id', 'schedule')]: setattr(new_slot,, getattr(self, if save: return new_slot
[docs] def is_same_slot(self, other_slot) -> bool: """Checks if both slots have the same room and start time.""" return == and self.start == other_slot.start
def build_ical(self, calendar, creation_time=None, netloc=None): if not self.start or not self.end or not return creation_time = creation_time or netloc = netloc or urlparse(get_base_url(self.event)).netloc tz = pytz.timezone(self.submission.event.timezone) vevent = calendar.add('vevent') vevent.add( 'summary' ).value = f'{self.submission.title} - {self.submission.display_speaker_names}' vevent.add('dtstamp').value = creation_time vevent.add('location').value = str( vevent.add('uid').value = 'pretalx-{}-{}@{}'.format( self.submission.event.slug, self.submission.code, netloc ) vevent.add('dtstart').value = self.start.astimezone(tz) vevent.add('dtend').value = self.end.astimezone(tz) vevent.add('description').value = self.submission.abstract or "" vevent.add('url').value = self.submission.urls.public.full()