Properly handle dates when serializing models to JSON in readmodels

kalite/testing/management/commands/readmodel.py

@@ -1,3 +1,4 @@
+import datetime
 import importlib
 import json
 import sys
@@ -9,6 +10,8 @@
 from django.core.management.base import BaseCommand, CommandError
 from django.core import serializers
 
+dthandler = lambda obj: obj.isoformat() if isinstance(obj, datetime.datetime) else None
+
 class Command(BaseCommand):
     args = "<model_path>"
 
@@ -40,7 +43,7 @@ def handle(self, *args, **options):
                 serialized_data = serializers.serialize("python", [data])[0]["fields"]
                 serialized_data["id"] = model_id
                 logging.debug("Serialized data: '%s'" % serialized_data)
-                print json.dumps(serialized_data)
+                print json.dumps(serialized_data, default=dthandler)
 
             except Model.DoesNotExist:
                 logging.error("Could not find '%s' entry with primary key: '%s'" % (model_path, model_id))