Django slugs ex w/in a "courses" app

course_detail.html

{% extends 'base.html' %}

{% block content %}
<div class="container">
  <h2>{{ object.title }}</h2>
  <p>Author: {{ object.author}}</p>
  <p>Description: {{ object.description }}</p>
  <p>Sections:</p>
  <ul>
    {% for section in course.sections.all %}
      <li>{{ section.title }}</li>
    {% endfor %}
  </ul>
</div>
{% endblock content %}

course_list.html

{% extends 'base.html' %}

{% block title %}Courses{% endblock %}

{% block content %}
<div class="container">
  <h1 class="courses">Courses</h1>
  {% if object_list %}
    {% for course in object_list %}
      <div>
        <h2><a href="{% url 'course_detail' course.slug %}">{{ course.title }}</a></h2>
        <p>Author: {{ course.author }}</p>
        <p>Description: {{ course.description }}</p>
      </div>
    {% endfor %}
  {% else %}
    <p>No courses!</p>
  {% endif %}
</div>
{% endblock content %}

models.py

from django.contrib.auth import get_user_model
from django.db import models
from django.urls import reverse
from django.utils.text import slugify


class Course(models.Model):
    title = models.CharField(max_length=255)
    description = models.CharField(max_length=255)
    author = models.ForeignKey(
        get_user_model(),
        on_delete=models.CASCADE
    )
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    slug = models.SlugField(default='')

    def __str__(self):
        return self.title

    def save(self, *args, **kwargs):
        self.slug = slugify(self.title)
        super(Course, self).save(*args, **kwargs)

    def get_absolute_url(self):
        return reverse('course_detail', kwargs={'slug': self.slug})

urls.py

from django.urls import path

from .views import CourseListView, CourseDetailView

urlpatterns = [
    path('', CourseListView.as_view(), name='course_list'),
    path('<slug:slug>/', CourseDetailView.as_view(), name='course_detail'),
]

views.py

from django.views.generic import ListView, DetailView

from .models import Course


class CourseListView(ListView):
    model = Course
    template_name = 'course_list.html'


class CourseDetailView(DetailView):
    model = Course
    template_name = 'course_detail.html'