#26819: Using a ArrayField on Meta.unique_together throws "unhashable type:
'list'"
on validate_unique method
----------------------------------+------------------------------------
Reporter: gleber-diniz | Owner: PREM1980
Type: Bug | Status: assigned
Component: contrib.postgres | Version: 1.9
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Old description:
> It happens on a second save (when there is already data to be validated)
>
> On this line: "if row_data in seen_data:", because row_data contains a
> list and seen_data is a set (row_data: (1, [1, 1]) / seen_data: set())
>
> Example to reproduce:
>
> models:
> {{{#!python
> class Map(models.Model):
> name = models.CharField(_('name'), max_length=128)
>
> class MapSpot(models.Model):
> map = models.ForeignKey('body.Map', related_name='spots')
> position = ArrayField(models.IntegerField(), size=2)
>
> class Meta:
> unique_together = [('map', 'position')]
> }}}
>
> admin:
> {{{#!python
> class MapSpotInline(admin.TabularInline):
> model = MapSpot
> extra = 0
>
> @admin.register(Map)
> class MapAdmin(admin.ModelAdmin):
> inlines = [MapSpotInline]
> }}}
New description:
--
Comment (by PREM1980):
As you mentioned, implemented fix in validate_unique() method. The above
code fixes the issue and all the unit tests got passed.
The only problem is Im not sure how to write the test case. It needs to be
simulated as if a user creates a form in the html page. Do you have any
pointers for testing similar condition?
row_data = tuple(d._get_pk_val() if hasattr(d, '_get_pk_val') else
tuple(d)
if type(d) is list else d for d in
row_data)
--
Ticket URL: <https://code.djangoproject.com/ticket/26819#comment:11>
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