On May 3, 2013, at 12:20 PM, Goran Popovic <goranpopo...@gmail.com> wrote:
> Table Versions > > # ID > # PARENT_ID > # TEXT > > If parent_id == Null: > its ORIGINAL > > if parent_id != Null: > it's REVISION > > Is it possible to achieve this with polymorphic_identity? > > It seems that polymorphic_identity doesn't support NULL and not NULL > > __mapper_args__ = { > 'polymorphic_identity':'original' > } not built in, but see the recipe at http://www.sqlalchemy.org/trac/ticket/1409#comment:3 . -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy?hl=en. For more options, visit https://groups.google.com/groups/opt_out.