The first link you gave have exactly the thing I said I don't want to do. The second one is however looks very promising.
Have I understand correctly that I need to create custom Session class and custom Query class for this session that would somehow produce correct from clause (with correct table name) from a statement like that session.query(ShardedEntity).filter(ShardedEntity.some_unique_name=='foo') If so, than could you give a little more guidance on it? Like what methods from query do I need do override etc? On Thursday, 19 May 2016 18:30:51 UTC+3, Mike Bayer wrote: > > > > Well if you want to see some examples of on-the-fly mappers for > different databases that nonetheless map to the same class take a look > at https://bitbucket.org/zzzeek/sqlalchemy/wiki/UsageRecipes/EntityName. > The kind of thing you're doing has been done before but it's not > totally easy. > > > Along with the entity name thing, you can customize Session as well as > how it generates a query. If you look at the source to the horizontal > sharding extension > > http://docs.sqlalchemy.org/en/latest/orm/extensions/horizontal_shard.html?highlight=horizontal#module-sqlalchemy.ext.horizontal_shard > > and maybe also my post at > > http://techspot.zzzeek.org/2012/01/11/django-style-database-routers-in-sqlalchemy/ > > <http://www.google.com/url?q=http%3A%2F%2Ftechspot.zzzeek.org%2F2012%2F01%2F11%2Fdjango-style-database-routers-in-sqlalchemy%2F&sa=D&sntz=1&usg=AFQjCNHCTZJLLutlOvl1P_S-Ua1Fn4MwHg> > > you can get some ideas for how to game things on the Session side. > > Those are the two tools you'd be working with here so hopefully you can > find a way to combine them in a way that works for you. > > > > > > > > I haven't created the issue because I didn't know if solution (not a > > workaround like mentioned in stackoverflow) already possible with > > sqlalchemy. If not it would be beneficial to add I think. > > > > -- > > You received this message because you are subscribed to the Google > > Groups "sqlalchemy" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to sqlalchemy+...@googlegroups.com <javascript:> > > <mailto:sqlalchemy+unsubscr...@googlegroups.com <javascript:>>. > > To post to this group, send email to sqlal...@googlegroups.com > <javascript:> > > <mailto:sqlal...@googlegroups.com <javascript:>>. > > Visit this group at https://groups.google.com/group/sqlalchemy. > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
