Django 2.1.3 Error: __init__() takes 1 positional argument but 2 were given

Question

I am trying to develop a website with Django 2.1.3 and python 3.7.1 When I go to the homepage I get this error:

TypeError at / __init__() takes 1 positional argument but 2 were given 

Here are some details about the code I write:

Traceback

    Environment:       Request Method: GET     Request URL: http://127.0.0.1:8000/          Django Version: 2.1.3     Python Version: 3.7.1     Installed Applications:     ['django.contrib.admin',      'django.contrib.auth',      'django.contrib.contenttypes',      'django.contrib.sessions',      'django.contrib.messages',      'django.contrib.staticfiles',      'core',      'crispy_forms']     Installed Middleware:     ['django.middleware.security.SecurityMiddleware',      'django.contrib.sessions.middleware.SessionMiddleware',      'django.middleware.common.CommonMiddleware',      'django.middleware.csrf.CsrfViewMiddleware',      'django.contrib.auth.middleware.AuthenticationMiddleware',      'django.contrib.messages.middleware.MessageMiddleware',      'django.middleware.clickjacking.XFrameOptionsMiddleware']                    Traceback:          File "C:\Users\andre\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\exception.py" in inner       34.             response = get_response(request)          File "C:\Users\andre\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\base.py" in _get_response       126.                 response = self.process_exception_by_middleware(e, request)          File "C:\Users\andre\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\base.py" in _get_response       124.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)          File "C:\Users\andre\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\contrib\auth\decorators.py" in _wrapped_view       21.                 return view_func(request, *args, **kwargs)          Exception Type: TypeError at /     Exception Value: __init__() takes 1 positional argument but 2 were given 

core/models.py

This is just one table on DB:

from django.db import models   class Evento(models.Model):     titolo_evento = models.CharField(max_length=30)     data_inizio = models.DateTimeField()     data_fine = models.DateTimeField()      def __str__(self):         return self.titolo_evento      class Meta:         verbose_name = 'Evento'         verbose_name_plural = 'Eventi' 

core/views.py

Here I want to see the DB "Eventi" on the homepage only if the user is authenticated, i think the mistake is here, but i don't know where:

from django.contrib.auth.decorators import login_required from .models import Evento from django.views.generic.list import ListView   @login_required class HomeView(ListView):     queryset = Evento.objects.all()     template_name = 'core/homepage.html'     context_object_name = 'lista_eventi' 

core/urls.py

from django.urls import path from . import views   urlpatterns = [     path('', views.HomeView, name='homepage'),     ] 

urls.py(project)

  from django.contrib import admin     from django.urls import path, include          urlpatterns = [         path('admin/', admin.site.urls),         path('', include('core.urls')),         path('accounts/', include('django.contrib.auth.urls'))     ] 

Answer 1

You need use as_view() at the end of class based views when declaring in the urls:

path('', views.HomeView.as_view(), name='homepage'), 

Also, when using login_required decorator, you need to use it on dispatch method of CBV:

from django.contrib.auth.decorators import login_required from django.utils.decorators import method_decorator  class HomeView(ListView):      @method_decorator(login_required)     def dispatch(self, *args, **kwargs):         return super(HomeView, self).dispatch(*args, **kwargs)