I had asked this question on Stack Overflow. The details are at this link: http://stackoverflow.com/questions/24836816/updating-a-few-children-in-one-to-many-relationship-deletes-all-rows-and-adds-ne
The summary is I have a parent class A and a bidirectional one-to-many relationship with class B. When I update the class B list for an instance of A, the update may involve deleting some class B instances, updating some of them, and adding new ones. However, I find that SqlAlchemy deletes all ROWS of classB, and the inserts the necessary new rows. I would have expected SqlAchemy to insert only new rows, not delete and add those rows that are being updated. Do you know what is wrong with my code? Thanks. -- 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. For more options, visit https://groups.google.com/d/optout.
