From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Mon, 12 Dec 2016 17:07:11 +0000 (-0500)
Subject: - xmin example requires a server default declaration to function
X-Git-Tag: rel_1_1_5~30
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1de76c42f6b64808448aed6e821fbb3b988f99b;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

- xmin example requires a server default declaration to function
correctly

Change-Id: I1cc50da6fe1c0eeef1d00201b45d998daddfd8ac
---

diff --git a/doc/build/orm/versioning.rst b/doc/build/orm/versioning.rst
index a2f1635c90..563185604d 100644
--- a/doc/build/orm/versioning.rst
+++ b/doc/build/orm/versioning.rst
@@ -142,12 +142,14 @@ which provides UPDATE versioning.  We can make use
 of the PostgreSQL ``xmin`` column to version our ``User``
 class as follows::
 
+    from sqlalchemy import FetchedValue
+
     class User(Base):
         __tablename__ = 'user'
 
         id = Column(Integer, primary_key=True)
         name = Column(String(50), nullable=False)
-        xmin = Column("xmin", Integer, system=True)
+        xmin = Column("xmin", Integer, system=True, server_default=FetchedValue())
 
         __mapper_args__ = {
             'version_id_col': xmin,