[Sqlalchemy-tickets] Issue #3471: onupdate runs for post_update updates (zzzeek/sqlalchemy)

[thiefmaster <iss...@bi...>]

New issue 3471: onupdate runs for post_update updates
https://bitbucket.org/zzzeek/sqlalchemy/issue/3471/onupdate-runs-for-post_update-updates

thiefmaster:

I'm inserting a new row where I specify an explicit value for a column that usually has a value set via `onupdate` in the model.

This works fine except when a relationship with `post_update=True` is involved. In this case the UPDATE used for the relationship also uses the value from `onupdate`.