Hi List,
I am just starting to build an application using Django. And my first 
attempt outside of procedural PHP and Perl-CGI. I am already loving it so 
much (and ditched other two already).

I am trying to construct the following query at the end.
Result.objects.filter(Q(analysis__experiment__experiment_code="PyLS24") 
|Q(analysis__experiment__experiment_code="PyLS40"))

How I do now:
The values are passed from a from(post) using checkboxes (#expcodes = 
request.POST.getlist('expcode')
). So I get a list of:
expcodes = ['PyLS24', 'PyLS40']
then use the for loop to construct string representation of Q object.
expcodes = ['PyLS24', 'PyLS40'] 
k=''
c=0
for e in expcodes:
j=e.join(['Q(analysis__experiment__experiment_code="','") '])
if c == 0:
k = j
else:
k='|'.join([k, j])
c = c+1

k in this gives me 'Q(analysis__experiment__experiment_code="PyLS24") 
|Q(analysis__experiment__experiment_code="PyLS40")  '.
When i use this to query the model as following... Result.objects.filter(k)I 
get "ValueError: too many values to unpack" error. But, exact string, if 
I copy paste into Results.object.filter(here) it works. 

When I checked the type, k constructed from for loop is in string format 
(obviously). But, when I copy paste the pint out of k, it automatically 
becomes Django's Q object.

Can anyone help me to sort this out. Or is there altogether a better way to 
do this query. I would really appreciate any help.


Gowthaman






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