Populated the models of the bookshelf app

neilocampo_reading/bookshelf/migrations/0002_alter_book_year_published.py

+# Generated by Django 4.1.7 on 2023-03-27 17:42
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='book',
+            name='year_published',
+            field=models.PositiveIntegerField(validators=[django.core.validators.MaxValueValidator(2023)]),
+        ),
+    ]

neilocampo_reading/bookshelf/models.py

@@ -15,7 +15,7 @@ class Book(models.Model):
     title = models.CharField(max_length=100)
     author = models.ForeignKey(Author, on_delete=models.CASCADE)
     publisher = models.CharField(max_length=100)
-    year_published = models.PositiveIntegerField()
+    year_published = models.PositiveIntegerField(validators=[MaxValueValidator(2023)])
     ISBN = models.IntegerField(validators=[MaxValueValidator(9999999999999)])
     blurb = models.TextField(
         validators=[