text: from rest_framework import serializers
  from apprest.models.experiment import CalipsoExperiment
  from apprest.models.user import CalipsoUser
  from apprest.serializers.session import CalipsoSessionSerializer
  
  
  class CalipsoExperimentSerializer(serializers.ModelSerializer):
  
      sessions = CalipsoSessionSerializer(many=True)
  
      class Meta:
          fields = ('proposal_id', 'subject', 'body', 'beam_line', 'sessions', 'uid', 'gid')
          model = CalipsoExperiment
  
      def to_representation(self, instance):
          data = super(CalipsoExperimentSerializer, self).to_representation(instance)
  
          user = self.context['request'].user
          calipso_user = CalipsoUser.objects.get(user=user)
  
          data['id'] = instance.calipsouserexperiment_set.get(calipso_user=calipso_user).id
          data['favorite'] = instance.calipsouserexperiment_set.get(calipso_user=calipso_user).favorite
  
          return data