text: from rest_framework import serializers
  
  from mkt.webapps.models import AppFeatures
  
  
  class AppFeaturesSerializer(serializers.ModelSerializer):
  
      class Meta:
          model = AppFeatures
          fields = []
          depth = 0
  
      def to_representation(self, obj):
          return [f.replace('has_', '') for f in obj._fields()
                  if getattr(obj, f) and f.startswith('has_')]
  