[sqlalchemy] Why is explicit 'and_' required for filter but not filter_by?
In 0.4: Is there any reason that I (as far as i can tell) need an explicit 'and_' to use multiple parameters with Query.filter, as opposed to filter_by, where I don't need an explicit 'and_'? I think the latter is cleaner. Ryan --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sqlalchemy] ForeignKey + schema
SA 0.3* doesn't seem to handle relationships between tables in different schemas very well: it seems to think that schema.A -> public.B is: schema.A -> schema.B and even specifying "primaryjoin=" in the mapper won't help it. There seems to be no directive to say "use the default / primary schema" (I'm using MSSQL, but I've seen very similar q's regarding both PG and Oracle, so I suspect it's not a db-specific issue) Just curious if there's been any work in this area on 0.4 in this area? I've been avoiding jumping in to 0.4 so far, but this could be the issue that gives me the push. Thx, Rick --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sqlalchemy] Load Lazy Relation in Separate Thread
Hi, I am doing some optimizations on our app, and one thing I was wondering is if I can have a lazy relation loading in a separate thread. The way I'd like to use it is like this. I have a list with products, and these products show a graph with stock levels. To draw this graph, the object fetches it's relation stock. The stock object is built like this: SELECT amount - (SELECT sum(qty) FROM orders WHERE id_product=stock.id_product) as available FROM stock WHERE id_product=1234; This is because we need to correct stock levels with the already placed orders to get a good idea of availability. This query takes fairly long (depending on the orders) so I'd like to draw a gray bar initially, start a thread to fetch the stock object and draw it once we have that result. Is this possible? If so, can anyone give me a hint how to start? Thanks, Koen --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
[sqlalchemy] db independent way to get id from sequence
Hi,
Are there any database independent way to get the id from some
sequence - for databases that supports it? For postgres this can be
done by issueing "select nextval('name_of_the_sequence')" statement,
but for other databases like oracle, firebird it is maybe different.
It seems that there is no such protocol in SA source, but maybe i am
missing something obvious.
I assume that to distinguish the databases that support sequences
metadata.bind.dialect.preexecute_sequences boolean can be used. am i
right?
regards,
stefan
p.s. currently i use the following code in postgres, but plan to use
something in other databases too:
sql = "select nextval('\"%s\"')" % name_of_the_sequence
oid =
db.connect().execute( sql.encode( db.dialect.encoding)).scalar()
print oid
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