python - How to use filter_horizontal on a ForeignKey between two apps using ContentTypes in Django admin? -

say have app named pantry connect other app may come along. keep app decoupled, generic relations used through model linkeditem connects ingredients model apps outside pantry.

i content on other end of generic relation, app named bakery, able filter_horizontal ingredients.

pantry models.py

from django.db import models django.contrib.contenttypes.models import contenttype django.contrib.contenttypes import fields  class ingredient(models.model):    '''    model containing ingredients, slugs, , descriptions    '''    name = models.charfield(unique=true, max_length=100)    slug = models.slugfield(unique=true, max_length=100)    description = models.charfield(max_length=300)     # method return name of db entry    def __str__(self):       return self.name  class linkeditem(models.model):    '''    model links ingredients various other content models    '''    content_type = models.foreignkey(contenttype)    object_id = models.positiveintegerfield()    content_object = fields.genericforeignkey('content_type', 'object_id')     ingredient = models.foreignkey(ingredient)     # method return name of db entry    def __str__(self):       return self.ingredient.name     # defines options model    class meta:      unique_together = (('content_type','object_id'))    # prevents duplicates 

bakery admin.py

from django.contrib import admin bakery.models import cake  class cakeadmin(admin.modeladmin):    filter_horizontal = ('') # put here ingredients show up? 

any ideas?

i think genericrelation for, need add 1 cake model , use it's name in cakeadmin.

but need use inlines if don't want lot of workaround m2m fields not supported relations intermediary models.