Dear SQLAlchemy users, I'm playing with inheritance for a CMS-like application. It's very usefull as it greatly simplifies the code.
Here is my SQL script http://pastebin.com/f7c5297c8 and here is my python code (mappers, etc) http://pastebin.com/f1e2738ba (Not everything is shown...) As you can see, everything inherits from a "Content". "Folder" are special "Content" which act as containers for one or more "Content" through the "FolderContent" object (folder_content table). The problem is at line 128 of the second paste, SQLAlchemy is unable to determine the join condition to the "Folder" ("folder" table) which seems strange because folder_content table has explicitely a foreign key to the "folder" table (line 70 of the first paste). When I try to get a specific FolderContent through : >>> model.FolderContent.query.get((12,6)) I get a: "ArgumentError: Could not determine join condition between parent/child tables on relation FolderContent.folder. Specify a 'primaryjoin' expression. If this is a many-to-many relation, 'secondaryjoin' is needed as well." 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) ? In advance thanks for your answers Best regards, 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 --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
