On Jan 23, 2008, at 4:24 PM, Monty Taylor wrote:
> > This may or may not be elixir specific... > > If I have an auto-generated mapping table for a many-to-many > relationship, is there a sensible way to add another column to it > that's > also has a foreign key relationship to a third table? > > Like, if I had this: > > Products > id int > name varchar > > ProductTypes > id int > name varchar > > Groups > id int > name varchar > > and then I defined a many to many between products and groups to get > > products_groups > product_id > group_id > > and I wanted to add producttype_id to that ... > If you're asking about creating mappers, a many-to-many table has exactly two foreign keys defined, that of a parent table and a child table. Any columns which are not part of those two foreign keys disqualifies the table to be considered a many-to-many table by SQLAlchemy's ORM; youd have to map a class to the table explicitly. if youre just talking about adding a column to a Table, i think theres an "append_column()" method which does that....(check the docstrings) --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
