text: from i18nfield.rest_framework import I18nAwareModelSerializer
  from rest_framework.serializers import ModelSerializer, SerializerMethodField
  
  from pretalx.schedule.models import Availability, Room
  
  
  class AvailabilitySerializer(ModelSerializer):
      allDay = SerializerMethodField()
  
      def get_allDay(self, obj):
          return obj.all_day
  
      class Meta:
          model = Availability
          fields = ("id", "start", "end", "allDay")
  
  
  class RoomSerializer(I18nAwareModelSerializer):
      url = SerializerMethodField()
  
      def get_url(self, obj):
          return obj.urls.edit
  
      class Meta:
          model = Room
          fields = ("id", "guid", "name", "description", "capacity", "position", "url")
  
  
  class RoomOrgaSerializer(RoomSerializer):
      availabilities = AvailabilitySerializer(many=True)
  
      class Meta:
          model = Room
          fields = RoomSerializer.Meta.fields + ("speaker_info", "availabilities")
  