Yeah, well, it is a select but didn't work. I also made another select
on top of it (to be sure), but the "error" persists (could not locate
column ...).
Nevermind about it, I think it's not a question of good usage of SA I
think :)
Thanks for your help!
Cheers,
Richard.
On 04/25/2013 01:22 PM, Michael Bayer wrote:
if the original "q" is a select(), this should work:
query(MyClass, q.c.somecol, q.c.someothercol).from_statement(q)
if not then I guess I'll screw around with it to see what works.
On Apr 25, 2013, at 10:37 AM, Richard Gerd Kuesters
<rich...@humantech.com.br <mailto:rich...@humantech.com.br>> wrote:
Yup, I agree with you, but things are a little out of hand for me to
use ORM-level queries. I'll see what I can do ...
Thanks! :)
Cheers,
Richard.
On 04/25/2013 11:31 AM, Michael Bayer wrote:
you'd need to organize things differently for the column grabbing to
work out.
I'd advise producing the query using ORM-level Query in the first
place so that you don't need to use from_statement(), which is
really a last resort system.
On Apr 25, 2013, at 10:27 AM, Richard Gerd Kuesters
<rich...@humantech.com.br <mailto:rich...@humantech.com.br>> wrote:
Well, not the desired result ... Now things justs blows :-)
*sqlalchemy.exc.NoSuchColumnError: "Could not locate column in row
for column 'anon_1.level'"*
Cheers,
Richard.
On 04/25/2013 11:03 AM, Michael Bayer wrote:
why not just say session.query(MyObj, q.alias()) ? creating
ad-hoc mappers is relatively expensive.
On Apr 25, 2013, at 8:56 AM, Richard Gerd Kuesters
<rich...@humantech.com.br <mailto:rich...@humantech.com.br>> wrote:
Well, probably nevermind because I made a workaround that
satisfies me (may not be elegant, but that's OK).
Basically, I created the "o" type a little different: "o =
type('MyObjExt', (Base,), {'__table__':q.alias('q')})" and append
it to the query like: "session.query(MyObj,
o).from_statement(q).all()"
Okay, now it returns a typle, but at least I don't have to make a
second query :)
Cheers,
Richard.
On 04/25/2013 09:41 AM, Richard Gerd Kuesters wrote:
Hi all,
I've been playing with "sqla_hierarchy" from
https://github.com/marplatense/sqla_hierarchy .
The problem is: the returned query appends 3 columns: level
(Integer), is_leaf (Boolean) and connect_path (pg ARRAY).
So far, so good. If I execute the query using
"session.execute(q).fetchall()", it works like a charm. But, as
we know, "session.execute" returns a RowProxy, not objects.
Using "session.query(MyObj).from_statement(q).all()", I'm able
to get my mapped objects, but without the extra columns that
would make me very pleased (level, is_leaf, connect_path). Is
there a way to get around this?
I have done testings using "o = type('MyObjExt', (MyObj,),
{'__table__': q}" and them use it on the session.query, *but* it
looses foreign key references - or, well, I don't know how to
"explain" this to the mapper (?), since MyObj is polymorphic
(probably the pitfall?).
Thanks for your time and help.
Best regards,
Richard.
--
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 http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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
<mailto:sqlalchemy+unsubscr...@googlegroups.com>.
To post to this group, send email to sqlalchemy@googlegroups.com
<mailto:sqlalchemy@googlegroups.com>.
Visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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 http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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
<mailto:sqlalchemy+unsubscr...@googlegroups.com>.
To post to this group, send email to sqlalchemy@googlegroups.com
<mailto:sqlalchemy@googlegroups.com>.
Visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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 http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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
<mailto:sqlalchemy+unsubscr...@googlegroups.com>.
To post to this group, send email to sqlalchemy@googlegroups.com
<mailto:sqlalchemy@googlegroups.com>.
Visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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 http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
--
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 http://groups.google.com/group/sqlalchemy?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
