Django: the value of list_display[4] refers to 'age', which is not a callable, etc

Question

I'm trying to extend the User model to add additional attributes to my "Person" model when I create instances of it, and I keep getting the following errors:

ERRORS:
<class 'polls.admin.PersonAdmin'>: (admin.E108) The value of 'list_display[4]' refers to 'age', which is not a callable, an attribute of 'PersonAdmin', or an attribute or method on 'auth.User'.
<class 'polls.admin.PersonAdmin'>:(admin.E108) The value of 'list_display[5]' refers to 'city', which is not a callable, an attribute of 'PersonAdmin', or an attribute or method on 'auth.User'.
<class 'polls.admin.PersonAdmin'>: (admin.E108) The value of 'list_display[6]' refers to 'state', which is not a callable, an attribute of 'PersonAdmin', or an attribute or method on 'auth.User'.

Person model:

class Person(models.Model):
    """ The model which defines a user of the application. Contains important
    information like name, email, city/state, age, etc """
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    first_name = models.CharField(max_length=200, null=True)
    last_name = models.CharField(max_length=200, null=True)
    email = models.CharField(max_length=200, null=True)
    city = models.CharField(max_length=200, null=True)
    state = models.CharField(max_length=200, null=True)
    age = models.CharField(max_length=50, null=True)

Create_account view:

def create_account(request):
    # function to allow a user to create their own account
    if request.method == 'POST':
        # sets a new user and gives them a username
        new_user = User(username = request.POST["username"],
                    email=request.POST["email"],
                    first_name=request.POST["first_name"],
                    last_name=request.POST["last_name"],
                    age=request.POST["age"],
                    city=request.POST["city"],
                    state=request.POST["state"]
                    )

        # sets an encrypted password
        new_user.set_password(request.POST["password"])
        new_user.save()
        # adds the new user to the database
        Person.objects.create(user=new_user,
                          first_name=str(request.POST.get("first_name")),
                          last_name=str(request.POST.get("last_name")),
                          email=str(request.POST.get("email")),
                          age=str(request.POST.get("age")),
                          city=str(request.POST.get("city")),
                          state=str(request.POST.get("state"))
                          )
        new_user.is_active = True
        new_user.save()
        return redirect('../')
    else:
        return render(request, 'polls/create_account.html')

Snippets of admin.py:

class PersonInline(admin.StackedInline):
    """ Details a person in line. """
    model = Person
    can_delete = False
    verbose_name_plural = 'person'

class PersonAdmin(admin.ModelAdmin):
    """ Defines a Person's information on the admin site
    with displays listed below. """
    list_display = ('username', 'email', 'first_name', 'last_name', 'age', 'city', 'state')
    inlines = (PersonInline, )

Any ideas on how to get this working?

Answer 1

You can't use admin.site.register(User, PersonAdmin), since User and Person are not the same model. Also, it looks like you are trying to include these Person model fields inside the User admin:

from django.contrib.auth.admin import UserAdmin

class PersonInline(admin.StackedInline):
    """ Details a person in line. """
    model = Person
    can_delete = False
    verbose_name_plural = 'person'

    fields = ('username', 'email', 'first_name', 'last_name', 'age', 'city', 'state')

class UserAdmin(UserAdmin):
    inlines = [
        PersonInline
    ]

# Re-register UserAdmin
admin.site.unregister(User)
admin.site.register(User, UserAdmin)