BigAutoField not mirrored as bigint in historical copy of table #556 (#560)

* Update models.py

BigAutoField not mirrored as bigint in historical copy of table #556

* noting issue in changelog

* expects 2 line breaks before class definition

* blank line 552 may not contain spaces

Author: partimer

CHANGES.rst

@@ -1,6 +1,9 @@
 Changes
 =======
 
+Unreleased
+----------
+- Fixed BigAutoField not mirrored as BigInt (gh-556)
 - Fixed most_recent() bug with excluded_fields (gh-561)
 
 

simple_history/models.py

@@ -528,7 +528,9 @@ def get_history_user(self, instance):
 def transform_field(field):
     """Customize field appropriately for use in historical model"""
     field.name = field.attname
-    if isinstance(field, models.AutoField):
+    if isinstance(field, models.BigAutoField):
+        field.__class__ = models.BigIntegerField
+    elif isinstance(field, models.AutoField):
         field.__class__ = models.IntegerField
 
     elif isinstance(field, models.FileField):