Added support for a model delta callback

Author: jdkizer9

easyaudit/settings.py

@@ -105,4 +105,6 @@ def get_model_list(class_list):
 REQUEST_EVENT_LIST_FILTER = getattr(settings, 'DJANGO_EASY_AUDIT_REQUEST_EVENT_LIST_FILTER', ['method', 'user', 'datetime', ])
 
 # JSON object representation serializer override
-CRUD_OBJECT_JSON_REPR_SERIALIZER_OVERRIDE = getattr(settings, 'DJANGO_EASY_AUDIT_CRUD_OBJECT_JSON_REPR_SERIALIZER_OVERRIDE', None)
+CRUD_OBJECT_JSON_REPR_SERIALIZER_OVERRIDE = getattr(settings, 'DJANGO_EASY_AUDIT_CRUD_OBJECT_JSON_REPR_SERIALIZER_OVERRIDE', None)
+
+CRUD_OBJECT_MODEL_DELTA_CALLBACK = getattr(settings, 'DJANGO_EASY_AUDIT_CRUD_OBJECT_MODEL_DELTA_CALLBACK', None)

easyaudit/signals/model_signals.py

@@ -15,7 +15,7 @@
 from easyaudit.models import CRUDEvent
 from easyaudit.settings import REGISTERED_CLASSES, UNREGISTERED_CLASSES, \
     WATCH_MODEL_EVENTS, CRUD_DIFFERENCE_CALLBACKS,\
-    CRUD_OBJECT_JSON_REPR_SERIALIZER_OVERRIDE 
+    CRUD_OBJECT_JSON_REPR_SERIALIZER_OVERRIDE, CRUD_OBJECT_MODEL_DELTA_CALLBACK
 from easyaudit.utils import model_delta
 
 logger = logging.getLogger(__name__)
@@ -71,6 +71,8 @@ def pre_save(sender, instance, raw, using, update_fields, **kwargs):
             if not created:
                 old_model = sender.objects.get(pk=instance.pk)
                 delta = model_delta(old_model, instance)
+                if CRUD_OBJECT_MODEL_DELTA_CALLBACK != None:
+                    delta = CRUD_OBJECT_MODEL_DELTA_CALLBACK(old_model, instance, delta)
                 changed_fields = json.dumps(delta)
                 event_type = CRUDEvent.UPDATE