[algorithms][serializers] Simplified result ordering

beat/web/algorithms/serializers.py

@@ -26,6 +26,7 @@
 ###############################################################################
 
 from rest_framework import serializers
+from operator import itemgetter
 
 from ..code.serializers import CodeSerializer, CodeCreationSerializer
 from ..libraries.serializers import LibraryReferenceSerializer
@@ -95,12 +96,7 @@ class AlgorithmSerializer(CodeSerializer):
         referencing_experiments = serializer.data
 
         # Put the pending experiments first
-        ordered_result = filter(lambda x: x['creation_date'] is None, \
-                                referencing_experiments)
-        ordered_result += filter(lambda x: x['creation_date'] is not None, \
-                                 referencing_experiments)
-
-        return ordered_result
+        return sorted(referencing_experiments, key=itemgetter('creation_date'))
 
 
 #----------------------------------------------------------