AttributeError at /homepage/ 'tuple' object has no attribute 'split'

from django.contrib.auth.models import User
from django.db import models
from django.utils import timezone
from django.urls import reverse
 
 
class PublishedManager(models.Manager):
    def get_queryset(self):
        return super(PublishedManager, self).get_queryset().filter(status='published')
        return super(PublishedManager, self).get_queryset().filter(rubric='news, crypto, programm')
 
 
class Post(models.Model):
    STATUS_CHOICES = (
       ('draft', 'Draft'),
       ('published', 'Published'),
    )
 
    RUBRIC_CHOICES = (
        ('news', 'News'),
        ('crypto', 'Crypto'),
        ('programm', 'Programm'),
    )
 
 
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=250,unique_for_date='publish')
    author = models.ForeignKey(User, on_delete=models.CASCADE)
    image = models.ImageField(upload_to='homapage/static/img', height_field=None, width_field=None)
    body = models.TextField()
    publish = models.DateField(default=timezone.now)
    created = models.DateField(auto_now_add='True')
    updated = models.DateField(auto_now=True)
    status = models.CharField(max_length=10, choices=STATUS_CHOICES, default='draft')
    rubric = models.CharField(max_length=10, choices=RUBRIC_CHOICES, default='news')
 
    objects = models.Manager()
    published = PublishedManager()
 
    def get_absolute_url(self):
        return reverse('homepage:post_detail', args=[self.publish.year,
                       self.publish.month, self.publish.day, self.slug])
 
    class Meta():
        ordering = ('-publish', '-news', '-crypto', '-programm',),
 
 
    def __str__(self):
        return self.title

from django.shortcuts import render, get_object_or_404
from .models import Post
 
 
# Обработчик для отображения списка новостей
def homepage_post_news(request):
    news_posts = Post.published.filter(rubric='news')
    return render(request, 'blog/post/list.html', {'news_posts': news_posts})
 
 
# Обработчик для отображения списка новостей криптовалют
def homepage_post_crypto(request):
    crypto_posts = Post.published.filter(rubric='crypto')
    return render(request, 'blog/post/list.html', {'crypto_posts': crypto_posts})
 
 
# Обработчик для отображения списка тем программирования
def homepage_post_programm(request):
    programm_posts = Post.published.filter(rubric='programm')
    return render(request, 'blog/post/list.html', {'programm_posts': programm_posts})
 
 
# Обработчик для отображения статей
def post_detail(request, year, month, day, post):
    post = get_object_or_404(Post, slug=post, status='published',
                             publish__year=year, publish__month=day,
                             publish__day=day)
    return render(request, 'blog/post/detail.html',{'post': 'post'})

from django.urls import path
from . import views
 
app_name = 'homepage'
 
urlpatterns = [
    # post views
    path('', views.homepage_post_news, name='homepage_post_news'),
 
    path('', views.homepage_post_crypto, name='homepage_post_crypto'),
 
    path('', views.homepage_post_programm, name='homepage_post_programm'),
 
    path('<int:year>/<int:month>/<int:dat>/<slug:post>/',
         views.post_detail, name='post_detail'),
]

"""
Django settings for ncp project.
 
Generated by 'django-admin startproject' using Django 3.0.8.
 
For more information on this file, see
https://docs.djangoproject.com/en/3.0/topics/settings/
 
For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.0/ref/settings/
"""
 
import os
 
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 
 
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.0/howto/deployment/checklist/
 
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = ''
 
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
 
ALLOWED_HOSTS = []
 
 
# Application definition
 
INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
 
    'homepage.apps.HomepageConfig',
]
 
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',
]
 
ROOT_URLCONF = 'ncp.urls'
 
TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    },
]
 
WSGI_APPLICATION = 'ncp.wsgi.application'
 
 
# Database
# https://docs.djangoproject.com/en/3.0/ref/settings/#databases
 
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'db_name',
        'USER' : 'user_name',
        'PASSWORD' : '*******',
        'HOST' : '127.0.0.1',
        'PORT' : '5432',
    }
}
 
 
# Password validation
# https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators
 
AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]
 
 
# Internationalization
# https://docs.djangoproject.com/en/3.0/topics/i18n/
 
LANGUAGE_CODE = 'ru-ru'
 
TIME_ZONE = 'UTC'
 
USE_I18N = True
 
USE_L10N = True
 
USE_TZ = True
 
 
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/
 
STATIC_URL = '/static/'
 
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

class PublishedManager(models.Manager):
    def get_queryset(self):
        return super(PublishedManager, self).get_queryset().filter(status='published')
        return super(PublishedManager, self).get_queryset().filter(rubric='news, crypto, programm')