[SQLObject] subquery with IN operator
Hi list, I would like to build an SQL query with sqlbuilder that contains several IN operators but I don't seem to succeed. The model is quite simple, there are several cities, each city contains a number of buildings, each building contains a number of floors and each floor contains a number of rooms. So it's pretty straightforward: class city(SQLObject): name = StringCol( ) buildings = MultipleJoin( 'building' ) class building(SQLObject): name = StringCol( ) complex = ForeignKey( 'city' ) floors = MultipleJoin( 'floor' ) class floor(SQLObject): name = StringCol( ) building = ForeignKey( 'building' ) rooms = MultipleJoin( 'room' ) class room(SQLObject): name = StringCol( ) floor = ForeignKey( 'floor' ) Now I would like to have a single SQL query for selecting all distinct room names in a given city. The problem is that with the above model both building.q.complex and building.q.floors throw an AttributeError so I can't use these in a room.select( ) statement together with IN and my impression so far has been that in such a select statement one should use these magic 'q' variables. Any ideas? - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ sqlobject-discuss mailing list sqlobject-discuss@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sqlobject-discuss
Re: [SQLObject] subquery with IN operator
On Sun, Feb 25, 2007 at 11:11:54PM +0100, Daniel Nogradi wrote: class city(SQLObject): name = StringCol( ) buildings = MultipleJoin( 'building' ) class building(SQLObject): name = StringCol( ) complex = ForeignKey( 'city' ) floors = MultipleJoin( 'floor' ) class floor(SQLObject): name = StringCol( ) building = ForeignKey( 'building' ) rooms = MultipleJoin( 'room' ) class room(SQLObject): name = StringCol( ) floor = ForeignKey( 'floor' ) both building.q.complex and building.q.floors throw an AttributeError ... Sorry for the typo, building.q.complex should have been building.q.city. But there is no city column in building. I would recommend you to start with foreign keys that exactly match referenced tables: class building(SQLObject): name = StringCol( ) city = ForeignKey( 'city' ) floor = MultipleJoin( 'floor' ) Alas, there is no building.q.floor because MultipleJoin implemented in SQLObject by backreferencing from the referenced table's ForeignKey. Oleg. -- Oleg Broytmannhttp://phd.pp.ru/[EMAIL PROTECTED] Programmers don't die, they just GOSUB without RETURN. - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.phpp=sourceforgeCID=DEVDEV ___ sqlobject-discuss mailing list sqlobject-discuss@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sqlobject-discuss
