the discriminator_on_association example http://docs.sqlalchemy.org/en/latest/_modules/examples/generic_associations/discriminator_on_association.html illustrates how to have a .parent link.
On Mon, Jul 30, 2018 at 5:48 AM, Simon King <si...@simonking.org.uk> wrote: > You could build this, but it's going to be messy. At the SQL level, if > you look at an Address row, there's not enough information to know > which association table to look in. You'd have to query all of the > association tables (perhaps using a UNION) to find the one that > contains the parent, and then query the appropriate parent table. > > Simon > > On Sat, Jul 28, 2018 at 7:39 AM Sven <sven.du...@gmail.com> wrote: >> >> Hi Mike, >> >> Ok, let's forget everything I said before, it is too confusing. >> >> I propose to start from the table_per_association example: >> >> http://docs.sqlalchemy.org/en/latest/_modules/examples/generic_associations/table_per_association.html >> >> Would it be possible to have an attribute address.parent linked to >> Customer/Supplier? Exactly like in the table_per_related example? >> >> for customer in session.query(Customer): >> for address in customer.addresses: >> print(address) >> print(address.parent) # this attribute is what I need >> >> Thank you! >> >> -- >> SQLAlchemy - >> The Python SQL Toolkit and Object Relational Mapper >> >> http://www.sqlalchemy.org/ >> >> To post example code, please provide an MCVE: Minimal, Complete, and >> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >> description. >> --- >> 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 https://groups.google.com/group/sqlalchemy. >> For more options, visit https://groups.google.com/d/optout. > > -- > SQLAlchemy - > The Python SQL Toolkit and Object Relational Mapper > > http://www.sqlalchemy.org/ > > To post example code, please provide an MCVE: Minimal, Complete, and > Verifiable Example. See http://stackoverflow.com/help/mcve for a full > description. > --- > 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 https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- 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 https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
