#29054: Unhashable type Point bug with multiple annotations
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Reporter: Lachlan Cannon | Owner: nobody
Type: Uncategorized | Status: new
Component: GIS | Version: 2.0
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by Lachlan Cannon:
Old description:
> Simplified example to reproduce, with these models:
>
> {{{#!python
> class State(models.Model):
> name = models.CharField(max_length=100)
>
> class Localitymodels.Model):
> name = models.CharField(max_length=100)
> location = models.PointField(geography=True)
> state = models.ForeignKey(State, on_delete=models.CASCADE)
> }}}
>
> Running the following code works fine in 2.0 (assuming you have a few
> models set up):
>
> {{{#!python
> State.objects.annotate(distance=Distance('locality__location',
> Locality.objects.first().location))
> }}}
>
> But this code works in 1.11, and fails in 2.0.1 with TypeError:
> unhashable type: 'Point':
>
> {{{#!python
> State.objects.annotate(distance=Distance('locality__location',
> self.locality.location)).annotate(count=Count('locality'))
> }}}
New description:
Simplified example to reproduce, with these models:
{{{#!python
class State(models.Model):
name = models.CharField(max_length=100)
class Locality(models.Model):
name = models.CharField(max_length=100)
location = models.PointField(geography=True)
state = models.ForeignKey(State, on_delete=models.CASCADE)
}}}
Running the following code works fine in 2.0 (assuming you have a few
models set up):
{{{#!python
State.objects.annotate(distance=Distance('locality__location',
Locality.objects.first().location))
}}}
But this code works in 1.11, and fails in 2.0.1 with TypeError: unhashable
type: 'Point':
{{{#!python
State.objects.annotate(distance=Distance('locality__location',
self.locality.location)).annotate(count=Count('locality'))
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/29054#comment:2>
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