#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
----------------------------------+------------------------------------

Comment (by PREM1980):

 Im trying to recreate this issue but have issues.


 {{{
 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')]
 }}}


 Error:-

  File "/Users/prem/Documents/django-contribute/mysite/polls/models.py",
 line 13, in Map
     name = models.CharField(_('name'), max_length=128)
 NameError: name '_' is not defined

--
Ticket URL: <https://code.djangoproject.com/ticket/26819#comment:3>
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