From 036cdbe7fb2d651ba5fbbc758c8584df011c8043 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 6 Apr 2018 11:39:15 -0400
Subject: Raise informative exception for non-sortable PK

An informative exception is re-raised when a primary key value is not
sortable in Python during an ORM flush under Python 3, such as an ``Enum``
that has no ``__lt__()`` method; normally Python 3 raises a ``TypeError``
in this case.   The flush process sorts persistent objects by primary key
in Python so the values must be sortable.

Change-Id: Ia186968982dcd1234b82f2e701fefa2a1668a7e4
Fixes: #4232
---
 lib/sqlalchemy/sql/sqltypes.py | 1 -
 1 file changed, 1 deletion(-)

(limited to 'lib/sqlalchemy/sql')

diff --git a/lib/sqlalchemy/sql/sqltypes.py b/lib/sqlalchemy/sql/sqltypes.py
index c02ece98a..573fda98f 100644
--- a/lib/sqlalchemy/sql/sqltypes.py
+++ b/lib/sqlalchemy/sql/sqltypes.py
@@ -1175,7 +1175,6 @@ class Enum(Emulated, String, SchemaType):
             two = 2
             three = 3
 
-
         t = Table(
             'data', MetaData(),
             Column('value', Enum(MyEnum))
-- 
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