假设我有一个名为Pantry的应用程序,它可以连接到我可能出现的任何其他应用程序。为了保持应用程序解耦,通过关系模型LinkedItem使用泛型关系,该模型将Ingredients模型连接到Pantry之外的应用程序。
我希望通用关系另一端的内容,比如一个名为Bakery的应用程序,能够使用Ingredients做一个filter_horizontal。
食品储藏室 models.py
from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes import fields
class Ingredient(models.Model):
'''
Model containing all the ingredients, their slugs, and their descriptions
'''
name = models.CharField(unique=True, max_length=100)
slug = models.SlugField(unique=True, max_length=100)
description = models.CharField(max_length=300)
# method to return the name of the db entry
def __str__(self):
return self.name
class LinkedItem(models.Model):
'''
Model that links ingredients to 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 to return the name of the db entry
def __str__(self):
return self.ingredient.name
# defines options for the model itself
class Meta:
unique_together = (('content_type','object_id')) # prevents duplicates
面包 admin.py
from django.contrib import admin
from bakery.models import Cake
class CakeAdmin(admin.ModelAdmin):
filter_horizontal = ('') # what to put here so ingredients show up?
有什么想法吗?
答案 0 :(得分:0)
我认为这是GenericRelation
的用途,因此您需要在Cake
模型中添加一个并在CakeAdmin中使用它的名称。
但是,如果您不希望以M2M fields are not supported for relations with intermediary models进行大量解决方法,则需要使用Inlines。