如何在 Django Admin.py 中按顺序显示 OrderItem

Question

I am trying to show the orderitemsadmin in the orderadmin using TabularInline but I keep getting the following error.

AttributeError: 'OrderItemAdmin' object has no attribute 'urls'

This is a Django e-commerce project and I am trying to facilitating the admin viewing the orders and their items.

I think the reason for the error is that I can't set a foreign relation with OrderItem and Order as the sequence is: Orderitem which has a foreign relation with Item, and Order which has a manytomany relation with OrderItem, if the switched their location or sequence it will mess with the ManytoMany relation.

Here is the admin.py

class OrderItemAdmin(admin.TabularInline):
    list_display = ['item', 'quantity', 'ordered']
    model = OrderItem

class OrderAdmin(admin.ModelAdmin):
    list_display = ['user', 'ordered', 'ordered_date', 'coupon', 'payment', 'shipping_address', 'status',
                    'refund_requested', 'refund_granted', 'ref_code']
    inlines = [
        OrderItemAdmin,
    ]
admin.site.register(Order, OrderAdmin)

Here is the models.py

class OrderItem(models.Model):
    item = models.ForeignKey(Item, on_delete=models.CASCADE)

class Order(models.Model):
    items = models.ManyToManyField(OrderItem)

Answer 1

You need to remove

admin.site.register(OrderItem, OrderItemAdmin)

this line. An inline can only be used in a modelAdmin that is why you get that error.