old_contents: import json
  
  from rest_framework import serializers
  from django.core.urlresolvers import reverse
  
  from landscapesim.models import Region
  
  
  class ReportingUnitSerializer(serializers.Serializer):
      type = serializers.SerializerMethodField()
      properties = serializers.SerializerMethodField()
      geometry = serializers.SerializerMethodField()
  
      class Meta:
          fields = ('type', 'geometry', 'properties',)
  
      def get_type(self, obj):
          return 'Feature'
  
      def get_geometry(self, obj):
          return json.loads(obj.polygon.json)
  
      def get_properties(self, obj):
          return {
              'id': obj.id,
              'unit_id': obj.unit_id,
              'name': obj.name
          }
  
  
  class RegionSerializer(serializers.ModelSerializer):
  
      url = serializers.SerializerMethodField()
  
      class Meta:
          model = Region
          fields = ('id', 'name', 'url')
      
      def get_url(self, obj):
          return reverse('region-reporting-units', args=[obj.id])
  
new_contents: import json
  
  from rest_framework import serializers
  from django.core.urlresolvers import reverse
  
  from landscapesim.models import Region
  
  
  class ReportingUnitSerializer(serializers.Serializer):
      type = serializers.SerializerMethodField()
      properties = serializers.SerializerMethodField()
      geometry = serializers.SerializerMethodField()
  
      class Meta:
          fields = ('type', 'geometry', 'properties',)
  
      def get_type(self, obj):
          return 'Feature'
  
      def get_geometry(self, obj):
          return json.loads(obj.polygon.json)
  
      def get_properties(self, obj):
          return {
              'id': obj.id,
              'unit_id': obj.unit_id,
              'name': obj.name
          }
  
  
  class RegionSerializer(serializers.ModelSerializer):
  
      url = serializers.SerializerMethodField()
      data = serializers.SerializerMethodField()
  
      class Meta:
          model = Region
          fields = ('id', 'name', 'url', 'data',)
      
      def get_url(self, obj):
          return reverse('region-reporting-units', args=[obj.id])
  
      def get_data(self, obj):
          if self.context.get('request').GET.get('return_data') == 'true':
              return ReportingUnitSerializer(obj.reporting_units.all(), many=True).data
          return None
  
subject: Allow data to be returned on the same request.