On Wed, 2007-05-23 at 14:33 -0700, Greg wrote:
> I'm having a problem displaying data in my admin using list_display.
> I want to be able to show the Manufacturer in the admin from my styles
> page. Here are my models:
>
> class Manufacturer(models.Model):
> name = models.CharField(maxlength=200)
> manufacturerslug = models.SlugField(prepopulate_from=["name"])
> description = models.TextField(maxlength=1000)
>
> def __str__(self,):
> return self.name
>
> class Admin:
> pass
>
> class Collection(models.Model):
> name = models.CharField(maxlength=200)
> collectionslug = models.SlugField(prepopulate_from=["name"])
> description = models.TextField(maxlength=1000)
> manufacturer = models.ForeignKey(Manufacturer)
>
> def __str__(self,):
> return self.name
>
> class Admin:
> pass
>
>
> class Style(models.Model):
> name = models.CharField(maxlength=200)
> theslug = models.SlugField(prepopulate_from=('name',))
> collection = models.ForeignKey(Collection)
>
>
> class Admin:
> search_fields = ['name']
> list_display = ('name', 'theslug','collection',
> 'collection.manufacturer')
>
>
> def __str__(self,):
> return self.name
>
>
>
> When I view my style table in the admin I want to be able to display
> the manufacturer. However, I don't have a manufacturer field in the
> Style table. All I have is a foreign key to collection, which
> contains a foreignkey to manufacturer. I have no problem displaying
> the collection that the style is associated with. I want to be able
> to show the manufacturer of the style in the admin.
>
> I currently do "list_display = ('name', 'theslug', 'collection',
> 'collection.manufacturer')" However it errors when
> 'collection.manufacurer'. Is it possible for me to show the
> Manufacturer of the style in the admin?
Doing list_display lookups across models like this doesn't work, as
you've discovered. One day we might even fix that, because it's about a
four line change to fix.
For the time being, the simplest solution is to create a method that
returns collection.manufacturer and use that method name in the
list_display list. You can even make this field sortable using the
admin_order_field attribute on the function (search the model-api docs
for more information), I suspect.
Regards,
Malcolm
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