Created bookshelf app, Author and Books models and corresponding Admin panels

justinreyes_reading/bookshelf/admin.py

+from django.contrib import admin
+from models import Author, Books
+
+
+class AuthorAdmin(admin.ModelAdmin):
+    model = Author
+    list_display = (
+        "first_name",
+        "last_name",
+        "age",
+        "nationality",
+        "bio",
+    )
+    search_fields = (
+        "first_name",
+        "last_name",
+    )
+    list_filter = ("nationality",)
+
+
+class BooksAdmin(admin.ModelAdmin):
+    model = Books
+    list_display = (
+        "title",
+        "author",
+        "publisher",
+        "year_published",
+        "isbn",
+    )
+    search_fields = (
+        "title",
+        "author",
+        "publisher",
+        "isbn",
+    )
+    list_filter = (
+        "publisher",
+        "author",
+    )
+
+
+class BooksInline(admin.StackedInline):
+    model = Books
+
+
+admin.site.register(Author, AuthorAdmin)
+admin.site.register(Books, BooksAdmin)

justinreyes_reading/bookshelf/apps.py

+from django.apps import AppConfig
+
+
+class BookshelfConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'bookshelf'

justinreyes_reading/bookshelf/models.py

+from django.db import models
+from django.core.validators import MaxLengthValidator
+
+
+class Author(models.Model):
+    first_name = models.CharField(max_length=255)
+    last_name = models.CharField(max_length=255)
+    age = models.PositiveIntegerField()
+    nationality = models.CharField(max_length=255)
+    bio = models.TextField(max_length=700)
+
+    def __str__(self):
+        return f"{self.first_name} {self.last_name}"
+
+
+class Books(models.Model):
+    title = models.CharField(max_length=255)
+    author = models.ForeignKey(Author, on_delete=models.CASCADE)
+    publisher = models.CharField(
+        max_length=255,
+        default="Unknown",
+    )
+    year_published = models.IntegerField(default=0)
+    isbn = models.PositiveBigIntegerField(validators=[MaxLengthValidator(13)])
+
+    def __str__(self):
+        return self.title

justinreyes_reading/bookshelf/tests.py

+from django.test import TestCase
+
+# Create your tests here.

justinreyes_reading/bookshelf/views.py

+from django.shortcuts import render
+
+# Create your views here.