Django: ManyToMany Inline Admin view error

Here are the model definitions:

class ItemBrand(models.Model):
    name = models.CharField(max_length = 30, unique = True)

    def __unicode__(self):
        return self.name

class WantedItem(models.Model):
    name = models.CharField(max_length = 120)
    description = models.TextField()
    created = models.DateTimeField(auto_now = False, auto_now_add = True)
    expires = models.DateTimeField(auto_now = False, auto_now_add = False)
    type = models.ForeignKey(ItemType, related_name = "type wanted")

    GENDER_CHOICES = (
        (1, 'Male'),
        (2, 'Female')
    )

    gender = models.IntegerField(choices = GENDER_CHOICES)    
    brands = models.ManyToManyField(ItemBrand, related_name = "wantedbrands", symmetrical = False)
    colors = models.ManyToManyField(ItemColor)
    sizes = models.ManyToManyField(ItemSize)
    creator = models.ForeignKey(User, related_name = "wishlist creator")

    def __unicode__(self):
        return self.name

Here is the AdminModel code:

class BrandsInline(admin.TabularInline):
    model = WantedItem.brands.through

class WantedItemAdmin(admin.ModelAdmin):
    list_display = ('name', 'created', 'expires', 'type', 'gender', 'creator')    
    search_fields = ('name', 'description')
    list_filter = ('created', 'brands',)
    ordering = ('-created',)
    inlines = [
        BrandsInline,
    ]
    exclude = ('brands',)

This is pulled basically right from the Django docs, and here's the error I am getting:

'ReverseManyRelatedObjectsDescriptor' object has no attribute 'through'

I am at a total loss... any ideas? Even if I literally create a linker table and set the "through" attribute in the Model I get the开发者_开发知识库 same error.

Broken?

You need to upgrade Django to the trunk.

Using inlines with many-to-many fields is new in the django development version (see docs).

Using a simplified version of your models, I get the same error as you for Django 1.1.1, but it works on the trunk (revision 11785).

As an aside, you don't need to specify symmetrical = False on your ItemBrand ManyToMany field. The symmetrical option is only intended for recursive relationships eg User <-> User.

You may want to have a look at the documentation on related names, and think about renaming them to something more logical as well. If creator is a User object, and want to get the set of wishlists they have created, the default when related_name is not specified is

creator.wishlist_set.all()

with your choice for related_name (when you add the underscore), this changes to

creator.wishlist_creator.all()

but I would recommend related_name='wishlists', in which case you would use

creator.wishlists.all()

While it may not be the cause of your error, spaces in the related_name attribute are invalid so I'd try removing those first.

"type wanted" => "type_wanted"

"wishlist creator" => "wishlist_creator"