First commit for issue jazzband#341 - Warning if inerhit is set to Fa…

…lse in an abstract class

simple_history/models.py

@@ -4,6 +4,7 @@
 import importlib
 import threading
 import uuid
+import warnings
 
 from django.apps import apps
 from django.conf import settings
@@ -72,6 +73,9 @@ def contribute_to_class(self, cls, name):
         models.signals.class_prepared.connect(self.finalize, weak=False)
         self.add_extra_methods(cls)
 
+        if cls._meta.abstract and not self.inherit :
+            warnings.warn("Historical records added to abstract model without inherit=true", UserWarning)
+
     def add_extra_methods(self, cls):
         def save_without_historical_record(self, *args, **kwargs):
             """