Add signal

apps/utils/models.py

@@ -11,6 +11,9 @@ from easy_thumbnails.fields import ThumbnailerImageField
 from utils.methods import image_path, svg_image_path
 from utils.validators import svg_image_validator
 
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+
 
 class ProjectBaseMixin(models.Model):
     """Base mixin model."""
@@ -123,6 +126,23 @@ class BaseAttributes(ProjectBaseMixin):
         null=True, related_name='%(class)s_records_modified'
     )
 
+    @receiver(pre_save)
+    def _pre_save(sender, instance, **kwargs):
+        if not issubclass(sender, BaseAttributes):
+            return
+
+        # debug
+        from establishment.models import Employee
+        if not isinstance(instance, Employee):
+            return
+
+        user = False
+
+        instance.modified_by = user
+
+        if instance._state.adding:
+            instance.created_by = user
+
     class Meta:
         """Meta class."""