Yes

q1 = db.software.os == os
q2 = db.software.x == y

filter1 = q1 & q2 # q1 and q2
filter2 = q1 | q2 # q1 or q2
filter3 = ~q1 & q2 # not q1 and q2

set1 = db(filter1)

and then use select, count, delete, update on sets

rows1=set1.select()

see web2py book section 6.5 for more details

On Apr 8, 4:36 am, selecta <[email protected]> wrote:
> is it possible to build database queries from smaller pieces
>
> I had something in mind like
>
>     filter = []
>     for key,value in session.filter.iteritems():
>         if key.startswith('os') and value:
>             os = key.split()[1]
>             filter.append( (db.software.os == os) )
>     ...
>     return UL([LI(s.name) for s in
> db(db.software.id>0)&filter.select()])

-- 
You received this message because you are subscribed to the Google Groups 
"web2py-users" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to 
[email protected].
For more options, visit this group at 
http://groups.google.com/group/web2py?hl=en.

Reply via email to