120 lines
3.4 KiB
Python
120 lines
3.4 KiB
Python
from typing import Any, Dict
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from django.contrib.contenttypes.fields import GenericRelation
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from django.db import models
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from .models import Item, ListOfSpeakers
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# See https://github.com/python/mypy/issues/3855
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Unsafe: Any = object
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class AgendaItemMixin(models.Model):
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"""
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A mixin for every model that should have an agenda item associated.
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"""
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# In theory there could be one then more agenda_item. But we support only one.
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agenda_items = GenericRelation(Item)
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class Meta(Unsafe):
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abstract = True
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"""
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Container for runtime information for agenda app (on create or update of this instance).
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Can be an attribute of an item, e.g. "type", "parent_id", "comment", "duration", "weight",
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or "create", which determinates, if the items should be created. If not given, the
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config value is used.
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"""
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agenda_item_update_information: Dict[str, Any] = {}
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agenda_item_skip_autoupdate = False
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@property
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def agenda_item(self):
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"""
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Returns the related agenda item, if it exists.
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"""
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try:
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return self.agenda_items.all()[0]
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except IndexError:
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return None
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@property
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def agenda_item_id(self):
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"""
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Returns the id of the agenda item object related to this object.
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"""
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if self.agenda_item is None:
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return None
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return self.agenda_item.pk
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def get_agenda_title_information(self):
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raise NotImplementedError(
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"An agenda content object has to provide title information"
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)
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class ListOfSpeakersMixin(models.Model):
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"""
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A mixin for every model that should have a list of speakers associated.
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"""
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# In theory there could be one then more list of speakers. But we support only one.
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lists_of_speakers = GenericRelation(ListOfSpeakers)
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class Meta(Unsafe):
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abstract = True
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list_of_speakers_skip_autoupdate = False
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@property
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def list_of_speakers(self):
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"""
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Returns the related list of speakers object.
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"""
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# We support only one list of speakers so just return the first element of
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# the queryset.
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return self.lists_of_speakers.all()[0]
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@property
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def list_of_speakers_id(self):
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"""
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Returns the id of the list of speakers object related to this object.
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"""
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return self.list_of_speakers.pk
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def get_list_of_speakers_title_information(self):
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raise NotImplementedError(
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"An agenda content object has to provide title information"
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)
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class AgendaItemWithListOfSpeakersMixin(AgendaItemMixin, ListOfSpeakersMixin):
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"""
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A combined mixin for agenda items and list of speakers.
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"""
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class Meta(Unsafe):
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abstract = True
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def set_skip_autoupdate_agenda_item_and_list_of_speakers(
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self, skip_autoupdate=True
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):
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self.agenda_item_skip_autoupdate = skip_autoupdate
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self.list_of_speakers_skip_autoupdate = skip_autoupdate
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def get_title_information(self):
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raise NotImplementedError(
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"An agenda content object has to provide title information"
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)
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def get_agenda_title_information(self):
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# TODO: See issue #4738
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return self.get_title_information()
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def get_list_of_speakers_title_information(self):
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# TODO: See issue #4738
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return self.get_title_information()
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