Hi, Chris.
Have you checked
http://docs.sqlalchemy.org/en/latest/orm/extensions/mutable.html
?
Regards,
Tate
-----Original Message-----
From: Chris Withers <ch...@simplistix.co.uk>
Sender: sqlalchemy@googlegroups.com
Date: Fri, 24 Feb 2012 10:49:46
To: <sqlalchemy@googlegroups.com>
Reply-To: sqlalchemy@googlegroups.com
Subject: [sqlalchemy] How can I tell SA that a mutable attribute has changed?
Hi All,
I have a JSON field that's value is usually a dictionary:
class MyModel(Base):
config = Column(JSONType(255))
(Does SA have a JSONType now? we're using a homebrew one, that may be
where the problem lies...)
So, if I do:
obj = session.query(MyModel).one()
obj.config['foo'] += 1
session.commit()
...on my dev machine, the change gets persisted.
Of course, on production machines, it does not :-(
The change I seem to need is:
config = dict(obj.config)
config['foo'] += 1
obj.config = config
Is there a better way?
cheers,
Chris
--
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