OpenSlides/openslides/topics/models.py

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from django.contrib.contenttypes.fields import GenericRelation
from django.db import models
from ..agenda.models import Item
from ..mediafiles.models import Mediafile
from ..utils.models import RESTModelMixin
from .access_permissions import TopicAccessPermissions
class TopicManager(models.Manager):
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"""
Customized model manager to support our get_full_queryset method.
"""
def get_full_queryset(self):
"""
Returns the normal queryset with all topics. In the background all
attachments and the related agenda item are prefetched from the
database.
"""
return self.get_queryset().prefetch_related('attachments', 'agenda_items')
class Topic(RESTModelMixin, models.Model):
"""
Model for slides with custom content. Used to be called custom slide.
"""
access_permissions = TopicAccessPermissions()
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objects = TopicManager()
title = models.CharField(max_length=256)
text = models.TextField(blank=True)
attachments = models.ManyToManyField(Mediafile, blank=True)
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# In theory there could be one then more agenda_item. But we support only
# one. See the property agenda_item.
agenda_items = GenericRelation(Item, related_name='topics')
class Meta:
default_permissions = ()
def __str__(self):
return self.title
@property
def agenda_item(self):
"""
Returns the related agenda item.
"""
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# We support only one agenda item so just return the first element of
# the queryset.
return self.agenda_items.all()[0]
@property
def agenda_item_id(self):
"""
Returns the id of the agenda item object related to this object.
"""
return self.agenda_item.pk
def get_agenda_title(self):
return self.title
def get_agenda_list_view_title(self):
return self.title
def get_search_index_string(self):
"""
Returns a string that can be indexed for the search.
"""
return " ".join((
self.title,
self.text))