from rest_framework import serializers

from db.base.models import Satellite, Transponder


class SatelliteSerializer(serializers.ModelSerializer):
    class Meta:
        model = Satellite


class TransponderSerializer(serializers.ModelSerializer):
    norad = serializers.SerializerMethodField()

    class Meta:
        model = Transponder
        fields = ('uuid', 'description', 'alive', 'uplink_low', 'uplink_high',
                  'downlink_low', 'downlink_high', 'mode', 'invert',
                  'baud', 'norad')

    def get_norad(self, obj):
        return obj.satellite.norad_cat_id

@@ -252,16 +252,23 @@
    norad
+_cat_id
  = seria
@@ -523,16 +523,23 @@
 , 'norad
+_cat_id
 ')%0A%0A    
@@ -551,16 +551,23 @@
 et_norad
+_cat_id
 (self, o

Change norad API field to proper name