87 lines
3.0 KiB
Python
87 lines
3.0 KiB
Python
"""Mixins for Events."""
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from django.core.exceptions import ImproperlyConfigured
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from django.db.models import Q
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from django.http import Http404
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from django.shortcuts import get_object_or_404
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from django.utils.translation import gettext as _
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from . import models
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# Ignore PyLintBear (R0903)
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class EventArchiveMixin(object):
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"""Adds an is_archive = True variable to the template context."""
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context_object_name = 'event_list'
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date_field = 'start'
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make_object_list = True
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model = models.Event
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paginate_by = 15
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template_name = 'events/event_archive.html'
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def get_context_data(self, **kwargs):
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"""Add is_archive to the context and set it to true.
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:return: TemplateContext object"""
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context = super(EventArchiveMixin, self).get_context_data(**kwargs)
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context['is_archive'] = True
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return context
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# Ignore PyLintBear (R0903)
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class EventDetailMixin(object):
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"""A very simple Mixin to add the related event to the template context."""
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event = None
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def get_context_data(self, **kwargs):
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"""Add this event or the related event of the given object to the template context.
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:return: TemplateContext object"""
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context = super(EventDetailMixin, self).get_context_data(**kwargs)
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if getattr(self, 'event'):
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context['event'] = self.event
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elif isinstance(getattr(self, 'object'), models.Event):
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context['event'] = self.object
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elif getattr(getattr(self, 'object'), 'event'):
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context['event'] = self.object.event
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else:
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raise ImproperlyConfigured("No Event in Context!")
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return context
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def get_queryset(self):
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"""set event attribute from the URL kwarg event and
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load all related objects from the set model.
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:return: a django QuerySets
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"""
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if self.model == models.Event:
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self.event = get_object_or_404(models.Event, pk=self.kwargs['pk'])
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queryset = self.model._default_manager.all()
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elif self.kwargs.get('event'):
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self.event = get_object_or_404(
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models.Event,
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pk=self.kwargs['event'])
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queryset = self.model.objects.filter(event=self.event)
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elif self.model:
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queryset = self.model._default_manager.all()
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else:
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raise ImproperlyConfigured(
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"%(cls)s is missing a QuerySet. Define "
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"%(cls)s.model, %(cls)s.queryset, or override "
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"%(cls)s.get_queryset()." % {
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'cls': self.__class__.__name__
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})
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return queryset.prefetch_related()
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class EventPhotoMixin(EventDetailMixin):
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def get_queryset(self):
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try:
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self.event = models.Event.objects.get(id=self.kwargs['event'])
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return models.Photo.objects.filter(
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Q(event=self.event) |
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Q(event__event_series=self.event)
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)
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except models.Event.DoesNotExist:
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raise Http404(_('Event does not exist'))
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