#10594: distance(geom) results ambiguous when the PointField can be null
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Reporter: whiteinge | Owner: nobody
Status: new | Milestone:
Component: GIS | Version: SVN
Resolution: | Keywords: distance queryset
Stage: Unreviewed | Has_patch: 1
Needs_docs: 0 | Needs_tests: 0
Needs_better_patch: 0 |
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Changes (by yourcelf):
* needs_better_patch: => 0
* has_patch: 0 => 1
* needs_tests: => 0
* needs_docs: => 0
Comment:
The problem seems to arise from line 49 in django/contrib/gis/measure.py
{{{
if not isinstance(value, float): value = float(value)
}}}
Where "value" is the value of the geometry field. If the field is null,
this becomes None, and propagates a ValueError up the stack resulting in
an empty queryset.
I'm attaching a patch which fixes this by altering the method which
constructs geometry objects out of the measurement attributes to instead
keep the attribute as "None" if the value is None.
--
Ticket URL: <http://code.djangoproject.com/ticket/10594#comment:1>
Django <http://code.djangoproject.com/>
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