On 8/19/2010 5:24 AM, Chris Withers wrote:
Michael Hipp wrote:
SQLAlchemy seems pretty smart about updating only the changed columns
in an orm object...
If I have an orm object. Something changes one of the columns. Just
before I commit() the session, is there a way to tell which columns
will be updated vs those that are unchanged?
Any way to ascertain the before/after values on those changed columns?
Here's the basics:
http://www.sqlalchemy.org/docs/session.html#session-attributes
These examples should fill in the rest:
http://www.sqlalchemy.org/trac/wiki/UsageRecipes/VersionedMap
http://www.sqlalchemy.org/trac/wiki/UsageRecipes/VersionedRows
http://www.sqlalchemy.org/docs/examples.html?#module-versioning
Thanks. But I believe all those items deal with which orm objects (rows) are
changed. I'm asking about columns within an orm object that might be changed.
Did I miss something?
Thanks,
Michael
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