Django：无法在管理面板中注册模型

Question

我的应用程序中有各种模型。但是，有一个我无法注册，所以我可以在admin panel.

所以在我的cart应用程序admin.py文件中，我可以使用：

from django.contrib import admin

from .models import Cart, CartItem

# Register your models here.

admin.site.register(Cart)

但不是：

from django.contrib import admin

from .models import Cart, CartItem

# Register your models here.

admin.site.register(Cart, CartItem)

因为我收到此错误：

 File "/home/ogonzales/Escritorio/projects_envs/perfectcushion_env/lib/python3.6/site-packages/django/contrib/admin/checks.py", line 26, in check_admin_app

    errors.extend(site.check(app_configs))

  File "/home/ogonzales/Escritorio/projects_envs/perfectcushion_env/lib/python3.6/site-packages/django/contrib/admin/sites.py", line 81, in check

    if modeladmin.model._meta.app_config in app_configs:

AttributeError: 'CartItem' object has no attribute 'model'

购物车/models.py：

from django.db import models

from shop.models import Product

# Create your models here.

class Cart(models.Model):

    cart_id = models.CharField(max_length=250, blank=True)

    date_added = models.DateField(auto_now_add=True)

    class Meta:

        db_table = 'Cart'

        ordering = ['date_added']

    def __str__(self):

        return self.cart_id

class CartItem(models.Model):

    product = models.ForeignKey(Product, on_delete=models.CASCADE)

    cart = models.ForeignKey(Cart, on_delete=models.CASCADE)

    quantity = models.IntegerField()

    active = models.BooleanField(default=True)

    class Meta:

        db_table = 'CartItem'

    def sub_total(self):

        return self.product.price * self.quantity

    def __str__(self):

        return self.product

Answer 1

您必须为两种模型调用 admin.site.register 两次：admin.site.register(Cart)admin.site.register(CartItem)

Answer 2

或者你可以这样做：admin.site.register([Cart, CartItem])