On Tue, 2008-12-09 at 12:38 -0500, Michael Bayer wrote:
>
> On Dec 9, 2008, at 5:08 AM, Julien Cigar wrote:
>
> >
> >
> > My question is: do I need to explicitely specify the join condition
> > when
> > inheritance is involved ? Why is SQLAlchemy able to detect the join
> > condition for my "Content" (line 127) but not for my "Folder" (line
> > 128) ?
>
> Folder extends Content and a FolderContent has two foreign key
> references to folder.join(content). I would also collapse
> FolderContent.folder and Folder.items into a single bidirectional
> relation. I have something I might commit today that would improve
> upon that though....
>
>
Indeed, it works with :
mapper(Folder, table.folder, inherits=Content,
polymorphic_identity=_get_type_id('folder'),
properties = {
'items' : relation(FolderContent, cascade='all, delete-orphan',
backref=backref('folder', cascade='all, delete-orphan',
primaryjoin=table.folder.c.content_id ==
table.folder_content.c.folder_id
)
)
}
)
thanks,
Julien
>
> >
--
Julien Cigar
Belgian Biodiversity Platform
http://www.biodiversity.be
Université Libre de Bruxelles (ULB)
Campus de la Plaine CP 257
Bâtiment NO, Bureau 4 N4 115C (Niveau 4)
Boulevard du Triomphe, entrée ULB 2
B-1050 Bruxelles
Mail: [EMAIL PROTECTED]
@biobel: http://biobel.biodiversity.be/person/show/471
Tel : 02 650 57 52
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