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,通过关系使用Ingredients模型与Pantry外部应用程序连接的LinkedItem模型使用泛型关系.
我可以在Django中为LinkedItem的管理员制作一个filter_horizontal.现在,我希望通用关系的另一端的内容,比如一个名为Bakery的应用程序,能够使用成分进行filter_horizontal.
茶水
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.ManyToManyField(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
面包店
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?
有任何想法吗?
最佳答案 一个解决方案是为LinkedItem创建一个 GenericTabularInline并对显示设置一些限制以避免重复,如下所示:
from django.contrib.contenttypes.admin import GenericTabularInline
class LinkedItemAdmin(GenericTabularInline):
model = LinkedItem
# choosing the field and display
field = ['ingredient']
filter_horizontal = ['ingredient']
# These help with removing some potential issues in the admin
extra = 0
min_num = 1
max_num = 1
can_delete = False
然后在CakeAdmin中,我可以做到这一点,使成分出现.
class CakeAdmin(admin.ModelAdmin):
inlines = [LinkedItemAdmin]