OpenSlides/openslides/assignments/projector.py

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from ..core.exceptions import ProjectorException
from ..utils.collection import CollectionElement
from ..utils.projector import ProjectorElement
from .models import Assignment, AssignmentPoll
class AssignmentSlide(ProjectorElement):
"""
Slide definitions for Assignment model.
You can send a poll id to get a poll slide.
"""
name = 'assignments/assignment'
def check_data(self):
if not Assignment.objects.filter(pk=self.config_entry.get('id')).exists():
raise ProjectorException('Election does not exist.')
poll_id = self.config_entry.get('poll')
if poll_id:
# Poll slide.
try:
poll = AssignmentPoll.objects.get(pk=poll_id)
except AssignmentPoll.DoesNotExist:
raise ProjectorException('Poll does not exist.')
if poll.assignment_id != self.config_entry.get('id'):
raise ProjectorException('Assignment id and poll do not belong together.')
def get_requirements(self, config_entry):
try:
assignment = Assignment.objects.get(pk=config_entry.get('id'))
except Assignment.DoesNotExist:
# Assignment does not exist. Just do nothing.
pass
else:
yield assignment
yield assignment.agenda_item
if not config_entry.get('poll'):
# Assignment detail slide. Yield user instances of current
# candidates (i. e. future poll participants) and elected
# persons (i. e. former poll participants).
for user in assignment.related_users.all():
yield user
else:
# Assignment poll slide. Yield user instances of the
# participants of all polls.
for poll in assignment.polls.all().prefetch_related('options'):
for option in poll.options.all():
yield option.candidate
def get_collection_elements_required_for_this(self, collection_element, config_entry):
output = super().get_collection_elements_required_for_this(collection_element, config_entry)
# Full update if assignment changes because then we may have new
# candidates and therefor need new users.
if collection_element == CollectionElement.from_values(Assignment.get_collection_string(), config_entry.get('id')):
output.extend(self.get_requirements_as_collection_elements(config_entry))
return output