On May 15 2008, 6:27 pm, Michael Bayer <mike...@zzzcomputing.com> wrote: > On May 15, 2008, at 12:12 PM, J. Cliff Dyer wrote: > > How can I use this field for polymorphism? Is it possible? > > polymorphicdiscriminators are currently table-local scalar columns. > So if you had a many-to-one of discriminators, youd currently have to > encode the discriminator to the primarykeyidentifier of each > discriminotor. We will eventually allow a python function to be used > as a discriminator as well which you can use to add a level of > abstraction to this (you'd preload the list of discriminiator objects > and again map based on primarykey).
Hello! Two years later.. :P Are we going to get a python function to be used as a discriminator soon? I would think that it would not be very difficult to implement, right? As shown in my previous emails in the thread "Model factory", that would solve my problem. I have the python function already written, but I don't know how to make sqlalchemy call to it. I thought that using a composite field should work, but it doesn't because as you say, it's not a table-local scalar column. If the problem is the proxy_set is not set, maybe I can set the proxy_set var to the composite_field somehow? Regards, Eduardo Robles Elvira. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
