Django: cannot register model in admin panel

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I've various models in my apps. However, there is this one that I cannot register so I can see it in the admin panel.

So in my cart app admin.py file, I can use:

from django.contrib import admin

from .models import Cart, CartItem

# Register your models here.
admin.site.register(Cart)

But not:

from django.contrib import admin

from .models import Cart, CartItem

# Register your models here.
admin.site.register(Cart, CartItem)

Because I get this error:

 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'

cart/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

cart/views.py:

from django.shortcuts import render, redirect, get_object_or_404
from shop.models import Product
from .models import Cart, CartItem
from django.core.exceptions import ObjectDoesNotExist
import stripe
from django.conf import settings
from order.models import Order, OrderItem




# Create your views here.

def _cart_id(request):
    cart = request.session.session_key
    if not cart:
        request.session.create()  # it does not return anything. that is why `cart = request.session.create()` will not work
        cart = request.session.session_key
    return cart  # Ultimately return cart



def add_cart(request, product_id):
    product = Product.objects.get(id = product_id)
    try:
        cart = Cart.objects.get(cart_id=_cart_id(request))
    except Cart.DoesNotExist:
        cart = Cart.objects.create(
            cart_id = _cart_id(request)
        )

        cart.save()
    try:
        cart_item = CartItem.objects.get(product = product, cart = cart)
        if cart_item.quantity < cart_item.product.stock:
            cart_item.quantity += 1
        cart_item.save()
    except CartItem.DoesNotExist:
        cart_item = CartItem.objects.create(
            product = product,
            quantity= 1,
            cart = cart,
        )
        cart_item.save()
    return redirect('cart:cart_detail')


def cart_detail(request, total = 0, counter = 0, cart_items = None):
    try:
        cart = Cart.objects.get(cart_id = _cart_id(request))
        cart_items =  CartItem.objects.filter(cart = cart, active=True)

        for cart_item in cart_items:
            total += (cart_item.product.price * cart_item.quantity)
            counter += cart_item.quantity
    except ObjectDoesNotExist:
        pass

    stripe.api_key = settings.STRIPE_SECRET_KEY
    stripe_total = int(total * 100)
    description = 'Perfect Cushion Shop - New Order'
    data_key = settings.STRIPE_PUBLISHABLE_KEY

    if request.method == "POST":
        print(request.POST)
        try:
            token = request.POST['stripeToken']
            email = request.POST['stripeEmail']
            billingName = request.POST['stripeBillingName']
            billingAddress1 = request.POST['stripeBillingAddressLine1']
            billingcity = request.POST['stripeBillingAddressCity']
            billingPostcode = request.POST['stripeBillingAddressZip']
            billingCountry = request.POST['stripeBillingAddressCountry']
            shippingName = request.POST['stripeShippingName']
            shippingAddress1 = request.POST['stripeShippingAddressLine1']
            shippingcity = request.POST['stripeShippingAddressCity']
            shippingPostcode = request.POST['stripeShippingAddressZip']
            shippingCountry = request.POST['stripeShippingAddressCountryCode']

            customer = stripe.Customer.create(
                email = email,
                source = token
            )
            charge = stripe.Charge.create(
                amount = stripe_total,
                currency = 'pen',
                description = description,
                customer = customer.id
            )
            '''Creating the order'''
            try:
                order_details = Order.objects.create(
                    token = token,
                    total = total,
                    emailAddress = email,
                    billingName = billingName,
                    billingAddress1 = billingAddress1,
                    billingCity= billingcity,
                    billingPostCode= billingPostcode,
                    billingCountry = billingCountry,
                    shippingName = shippingName,
                    shippingAddress1 = shippingAddress1,
                    shippingCity=shippingcity,
                    shippingPostcode = shippingPostcode,
                    shippingCountry = shippingCountry
                )
                order_details.save()
                for order_item in cart_items:
                    oi = OrderItem.objects.create(
                        product = order_item.product.name,
                        quantity = order_item.quantity,
                        price = order_item.product.price,
                        order = order_details
                    )
                    oi.save()
                    print("La orden fue creada")
                    print("Esta es la orden")
                    print(str(oi))

                return redirect('order:thanks', order_details.id)
            except ObjectDoesNotExist:
                pass
        except stripe.error.CardError as e:
            return False,e

    return render(request, 'cart.html', dict(cart_items = cart_items, total = total, counter = counter, data_key = data_key, stripe_total = stripe_total,
                                             description = description))


def cart_remove(request, product_id):
    cart = Cart.objects.get(cart_id = _cart_id(request))
    product = get_object_or_404(Product, id = product_id)
    cart_item = CartItem.objects.get(product=product, cart = cart)
    if cart_item.quantity > 1:
        cart_item.quantity -= 1
        cart_item.save()
    else:
        cart_item.delete()
    return redirect('cart:cart_detail')


def full_remove(request, product_id):
    cart = Cart.objects.get(cart_id = _cart_id(request))
    product = get_object_or_404(Product, id = product_id)
    cart_item = CartItem.objects.get(product=product, cart = cart)
    cart_item.delete()

    return redirect('cart:cart_detail')

Edit your admin.py as

from django.contrib import admin

from .models import Cart, CartItem

# Register your models here.
admin.site.register(Cart)
admin.site.register(CartItem)

model not showing up in django admin, HmmmmTry change include of your app in settings.py: From: INSTALLED_APPS = ( 'django.contrib.auth', 'django.contrib.contenttypes',  from django.apps import apps models = apps.get_models () for model in models: admin.site.register (model) This will fetch all the models in all apps and registers them with the admin interface. This works well if we are automatically registering all the models.

You have to call admin.site.register twice for the two models:

admin.site.register(Cart)
admin.site.register(CartItem)

Django: cannot register model in admin panel, Django: cannot register model in admin panel. django admin inline foreign key admin.site.register not working django models django admin custom field django​  Register the Venue model with the admin; line 5. Register the MyclubUser model with the admin; Line 6. Register the Event model with the admin; Save the file, refresh your browser and your admin index page should now look like Figure 7-3. Note that you now have an Events group under the Authentication and Authorization group.

Or you can do:

admin.site.register([Cart, CartItem])

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