movie-night-api/movie_manager/viewsets/schedule.py

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import datetime
from django.http import JsonResponse
from knox.auth import TokenAuthentication
from rest_framework import viewsets, permissions
from movie_manager.models import Schedule, Showing
from movie_manager.permissions import ReadOnly
from movie_manager.serializers import (
ScheduleSerializer,
ShowingSerializer,
MovieSerializer,
)
class ScheduleViewset(viewsets.ModelViewSet):
queryset = Schedule.objects.all().order_by("name")
authentication_classes = [TokenAuthentication]
permission_classes = [permissions.IsAuthenticated | ReadOnly]
serializer_class = ScheduleSerializer
def retrieve(self, request, pk=None, *args, **kwargs):
# Get the schedule instance
instance = self.get_object()
now = datetime.datetime.now()
# get time from start of day
today = datetime.datetime(now.year, now.month, now.day)
upcoming_showings = Showing.objects.filter(
showtime__gte=today, schedule=instance
)
# Create a serialized response
serializer = self.get_serializer(instance)
data = serializer.data
# Replace all showings with only future showings
data["showings"] = ShowingSerializer(upcoming_showings, many=True).data
if request.GET.get("past_showings") == "true":
past_showings = Showing.objects.filter(
showtime__lt=today, schedule=instance
)
# Add both to the response
data["past_showings"] = [
{
"id": showing.id,
"showtime": showing.showtime.isoformat(),
"movie": MovieSerializer(showing.movie).data,
}
for showing in past_showings
]
else:
data["past_showings"] = []
return JsonResponse(data)