you can achieve this with the associationproxy extension, this is described at:
http://www.sqlalchemy.org/docs/04/plugins.html#plugins_associationproxy On Dec 5, 11:49 am, paftek <[EMAIL PROTECTED]> wrote: > Hi, > > Sorry for this meaningless subject ! > I am learning SQLAlchemy and I installed version 0.4.1 few days ago. > > My problem is probably easy to solve. I swear I have read a good part > of the documentation, and searched this group ! But... > > Short example. Two tables : > - "languages" having a sequence as primary key and a column of unique > short names ('en', 'fr', etc.) > - "items" having a foreign key on 'language_id' (see Python code > below) > > When creating a new item, it is not significant to fill the foreign > key value with a integer. I wish the mapper had a way to find it > through the unique language name : > > item = Item() > item.name = 'A great item' > item.language_name = 'en' > session.save(item) > > Please, how to do that ? > > Cheers > > -------------------------------------------------------------------------------- > > languages_table = Table('languages', metadata, > Column('language_id', PGInteger, Sequence('language_id_seq'), > primary_key=True), > Column('name', Unicode(), nullable=False, unique=True) > ) > items_table = Table('items', metadata, > Column('item_id', PGInteger, Sequence('item_id_seq'), > primary_key=True), > Column('language_id', PGInteger, > ForeignKey('languages.language_id'), primary_key=True), > Column('name', Unicode(), nullable=False) > ) > class Item(object): pass --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
