Built and populated bookshelf app models, Author and Book.

ianaragoza_reading/bookshelf/admin.py

 from django.contrib import admin
+from .models import Author, Book
+
 
 # Register your models here.
+class AuthorAdmin(admin.ModelAdmin):
+    model = Author
+    search_fields = ('first_name', 'last_name',)
+    list_display = ('last_name', 'first_name', 'nationality', 'age', 'bio',)
+    list_filter = ('nationality', 'age',)
+
+
+class BookAdmin(admin.ModelAdmin):
+    model = Book
+    search_fields = ('title', 'author',)
+    list_display = ('title', 'author', 'publisher', 'year_published', 'ISBN', 'blurb')
+    list_filter = ('publisher', 'year_published',)
+
+
+admin.site.register(Author, AuthorAdmin)
+admin.site.register(Book, BookAdmin)

ianaragoza_reading/bookshelf/migrations/0001_initial.py

+# Generated by Django 4.1.7 on 2023-03-27 15:59
+
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Author',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('first_name', models.CharField(max_length=255)),
+                ('last_name', models.CharField(max_length=255)),
+                ('age', models.IntegerField()),
+                ('nationality', models.CharField(max_length=255)),
+                ('bio', models.TextField(max_length=700)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Books',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=255)),
+                ('publisher', models.CharField(max_length=255)),
+                ('year_published', models.PositiveIntegerField(validators=[django.core.validators.MinValueValidator(1), django.core.validators.MaxValueValidator(2023)])),
+                ('ISBN', models.IntegerField(validators=[django.core.validators.MinLengthValidator(13), django.core.validators.MaxLengthValidator(13)])),
+                ('blurb', models.TextField()),
+                ('author', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='books', to='bookshelf.author')),
+            ],
+        ),
+    ]

ianaragoza_reading/bookshelf/migrations/0002_rename_books_book.py

+# Generated by Django 4.1.7 on 2023-03-27 16:13
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.RenameModel(
+            old_name='Books',
+            new_name='Book',
+        ),
+    ]

ianaragoza_reading/bookshelf/migrations/0003_alter_book_isbn.py

+# Generated by Django 4.1.7 on 2023-03-27 16:22
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0002_rename_books_book'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='book',
+            name='ISBN',
+            field=models.IntegerField(validators=[django.core.validators.MinValueValidator(9780000000000), django.core.validators.MaxValueValidator(9789999999999)]),
+        ),
+    ]

ianaragoza_reading/bookshelf/models.py

 from django.db import models
+from django.urls import reverse
+from django.core.validators import MaxValueValidator, MinValueValidator
+
 
 # Create your models here.
+class Author(models.Model):
+    first_name = models.CharField(max_length=255)
+    last_name = models.CharField(max_length=255)
+    age = models.IntegerField()
+    nationality = models.CharField(max_length=255)
+    bio = models.TextField(max_length=700)
+
+    def __str__(self):
+        return '{} {}'.format(self.first_name, self.last_name)
+
+    def get_absolute_url(self):
+        return reverse('author_detail', args=[str(self.last_name)])
+
+
+class Book(models.Model):
+    title = models.CharField(max_length=255)
+    author = models.ForeignKey(Author, on_delete=models.CASCADE, related_name='books')
+    publisher = models.CharField(max_length=255)
+    year_published = models.PositiveIntegerField(validators=[MinValueValidator(1), MaxValueValidator(2023)])
+    ISBN = models.IntegerField(validators=[MinValueValidator(9780000000000), MaxValueValidator(9789999999999)])
+    blurb = models.TextField()
+
+    def __str__(self):
+        return '{}'.format(self.title)
+
+    def get_absolute_url(self):
+        return reverse('book_detail', args=[str(self.title)])