Generic view template seems to have empty input

[Manos Zeakis]

Hi 

I have declared a model and the simple views I created are working.

Now I am trying to move to generic views. 

So I added in urls.py

    path('book2/<int:pk>/', views.DetailView.as_view(), name='detail'),

And in views.py

class DetailView(generic.DetailView):
    model = Book

And the template is

{% block content %}

  <h1>book List</h1>
  {% if object_list %}
  <ul>
    {% for book in object_list %}
      <li>
        {{ book.author }}
      </li>
    {% endfor %}
  </ul>
  {% else %}
    <p>There are no books in the library.</p>
  {% endif %}       

{% endblock %}

For reference the models.py had been

class Book(models.Model):
    author = models.CharField(max_length=70)

But the result is "There are no books in the library". So it seems that the 
books list is not transferred to the template to be rendered. Could you 
help me understand where I have done wrong?

Thank you

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