make any_field_blank optional

django_any/models.py

@@ -32,21 +32,23 @@
 @any_field.decorator
 def any_field_blank(function):
     """
-    Sometimes return empty value if field could be blank
+    Sometimes return empty value if field could be blank and
+    `settings.ALWAYS_FILL_BLANK_FIELDS` is `False` (default)
     """
     def wrapper(field, **kwargs):
         # any_model(Entry, pub_date__isnull=True)
         if kwargs.get('isnull', False):
             return None
 
-        if field.blank and random.random() < 0.1:
-            if field.null:
-                return None
-            else:
-                try:
-                    return field.to_python('')
-                except ValidationError as e:  # bool, int, etc.
-                    pass
+        if not getattr(settings, 'ALWAYS_FILL_BLANK_FIELDS', False):
+            if field.blank and random.random() < 0.1:
+                if field.null:
+                    return None
+                else:
+                    try:
+                        return field.to_python('')
+                    except ValidationError as e:  # bool, int, etc.
+                        pass
 
         return function(field, **kwargs)
     return wrapper