#13794: Django does not respect to_field's model on an inline model admin
-------------------------------------+-------------------------------------
Reporter: sebastien@… | Owner: gautier
Type: Bug | Status: new
Component: Forms | Version:
Severity: Normal | 1.5-beta-1
Keywords: admin inline | Resolution:
to_field formset | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Old description:
> The problem occurs in the function __unicode__ of ModelB
>
> When editing a ModelA instance in admin site, all ModelB instances have a
> modela_id set to the pk of the ModelA instance, instead of the value of
> the to_field's field. And, when accessing to the field modela of a ModelB
> instance, a DoesNotExist exception is raised.
>
> This problem does not occus in the shell :
> {{{
> In [3]: ModelA.objects.all()[0].modelb_set.all()[0].modela_id
> Out[3]: u'TRUC'
>
> In [6]: ModelB.objects.all()[0].modela_id
> Out[6]: u'TRUC'
> }}}
>
> See below to reproduce
>
> {{{
> models.py
>
> class ModelA(models.Model):
> code = models.CharField(max_length=20, unique=True)
>
> class ModelB(models.Model):
> modela = models.ForeignKey(ModelA, to_field="code")
> position = models.IntegerField()
>
> def __unicode__(self):
> return u"%s" % self.modela
>
> admin.py
>
> class ModelBInlineAdmin(admin.TabularInline):
> model = ModelB
>
> class ModelAAdmin(admin.ModelAdmin):
> model = ModelA
> inlines = [ModelBInlineAdmin]
>
> admin.site.register(ModelA, ModelAAdmin)
>
> }}}
New description:
The problem occurs in the function `__unicode__` of `ModelB`
When editing a `ModelA` instance in admin site, all `ModelB` instances
have a `modela_id` set to the `pk` of the `ModelA` instance, instead of
the value of the `to_field`'s field. And, when accessing to the field
modela of a `ModelB` instance, a `DoesNotExist` exception is raised.
This problem does not occur in the shell :
{{{
In [3]: ModelA.objects.all()[0].modelb_set.all()[0].modela_id
Out[3]: u'TRUC'
In [6]: ModelB.objects.all()[0].modela_id
Out[6]: u'TRUC'
}}}
See below to reproduce
{{{
# models.py
class ModelA(models.Model):
code = models.CharField(max_length=20, unique=True)
class ModelB(models.Model):
modela = models.ForeignKey(ModelA, to_field="code")
position = models.IntegerField()
def __unicode__(self):
return u"%s" % self.modela
# admin.py
class ModelBInlineAdmin(admin.TabularInline):
model = ModelB
class ModelAAdmin(admin.ModelAdmin):
model = ModelA
inlines = [ModelBInlineAdmin]
admin.site.register(ModelA, ModelAAdmin)
}}}
--
Comment (by aaugustin):
Added a bit of markup for reaadability.
--
Ticket URL: <https://code.djangoproject.com/ticket/13794#comment:9>
Django <https://code.djangoproject.com/>
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