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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