fix: work around the validation for cbaSeriesIs & defaultPlaylistId

Closes #178

program/serializers.py

@@ -558,6 +558,16 @@ class ShowSerializer(serializers.HyperlinkedModelSerializer):
             "type_id",
         ) + read_only_fields
 
+    @staticmethod
+    def validate_cba_series_id(value):
+        # FIXME: ugly hack to capture 0 as None
+        return None if value == 0 else value
+
+    @staticmethod
+    def validate_default_playlist_id(value):
+        # FIXME: ugly hack to capture 0 as None
+        return None if value == 0 else value
+
     def create(self, validated_data):
         """
         Create and return a new Show instance, given the validated data.