final working verision

bookshelf/migrations/0003_alter_books_author.py

+# Generated by Django 4.1.7 on 2023-03-28 13:34
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0002_alter_books_isbn'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='books',
+            name='author',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='books', to='bookshelf.author'),
+        ),
+    ]

bookshelf/models.py

@@ -15,7 +15,7 @@ class Author(models.Model):
 
 class Books(models.Model):
     title = models.CharField(max_length=200)
-    author = models.ForeignKey(Author, on_delete=models.CASCADE)
+    author = models.ForeignKey(Author, related_name="books", on_delete=models.CASCADE)
     publisher = models.CharField(max_length=200)
     year_published = models.DateField()
     ISBN = models.PositiveIntegerField(

bookshelf/views.py

@@ -29,4 +29,6 @@ class AuthorListView(ListView):
 
 class AuthorDetailView(DetailView):
     model = Author
+    queryset = Author.objects.all()
     template_name = 'authors_details.html'
+    context_object_name = 'authors'

templates/authors_details.html

@@ -7,7 +7,7 @@
 <h1>{{object.first_name}}{{object.last_name}}</h1>
 <h2>{{object.age}}</h2>
 <h2>{{object.nationality}}</h2>
-<h2>{{object.bio}}</h2>
+<h2>{{authors.bio}}</h2>
 
 {% for Books in object_list %}
 <li>
@@ -18,6 +18,12 @@
 {% endfor %}
 <br><br>
 <h2>Books by {{object.first_name}}{{object.last_name}} that I love:</h2>
+{% for books in authors.books.all %}
+<a href="http://127.0.0.1:8000/books/{{ books.pk }}/details">
+    {{books.title}}
+</a>
+<br>
+{% endfor %}
 <br><br>
 <a href="/books">Books</a>
 <a href="/authors">Authors</a>