Filters can be applied in multiple statements, and querysets are
evaluated lazily, so the following would work and would only run a
single query, when you finally output or otherwise check the contents
of the results variable:
def get_results(...):
...
results =
MyThing.objects.filter(required_field=somevalue).filter(other_required_field=othervalue)
if optional_value_submitted:
results = results.filter(optional_field=optional_value)
if other_optional_value:
results =
results.filter(other_optional_field=other_optional_value)
return results
On Aug 16, 8:20 am, john <deont...@gmail.com> wrote:
> hi,
> i have a form with few fields as optional,i.e can be left blank,
> i want to search my db for values i receive from this form, how should
> i go on about writing my filters when some of values can be " ".
> any reference is kindly appreciated
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