Do not create CRUDEvent on update if none of the fields has changed.

easyaudit/models.py

@@ -3,7 +3,6 @@
 from django.db import models
 
 
-# Create your models here.
 class CRUDEvent(models.Model):
     CREATE = 1
     UPDATE = 2

easyaudit/signals/model_signals.py

@@ -67,6 +67,8 @@ 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 not delta:
+                    return False
                 changed_fields = json.dumps(delta)
                 event_type = CRUDEvent.UPDATE
 

easyaudit/tests/test_app/tests.py

@@ -47,6 +47,22 @@ def test_m2m_model(self):
         data = json.loads(crud_event.object_json_repr)[0]
         self.assertEqual(data['fields']['test_m2m'], [obj.id])
 
+    def test_update(self):
+        obj = TestModel.objects.create()
+        crud_event_qs = CRUDEvent.objects.filter(object_id=obj.id, content_type=ContentType.objects.get_for_model(obj))
+        self.assertEqual(1, crud_event_qs.count())
+        obj.name = 'changed name'
+        obj.save()
+        self.assertEqual(2, crud_event_qs.count())
+        last_change = crud_event_qs.first()
+        self.assertIn('name', last_change.changed_fields)
+
+    def test_fake_update(self):
+        obj = TestModel.objects.create()
+        crud_event_qs = CRUDEvent.objects.filter(object_id=obj.id, content_type=ContentType.objects.get_for_model(obj))
+        obj.save()
+        self.assertEqual(1, crud_event_qs.count())
+
 
 class TestMiddleware(TestCase):
     def _setup_user(self, email, password):