Altered books model to use CharField instead of IntegerField for the...

Altered books model to use CharField instead of IntegerField for the publishing year, populated models with 15 records each

carlosoarde_reading/bookshelf/migrations/0003_alter_books_year_published.py

+# Generated by Django 4.1.7 on 2023-03-27 10:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0002_rename_book_books'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='books',
+            name='year_published',
+            field=models.PositiveIntegerField(default='', null=True),
+        ),
+    ]

carlosoarde_reading/bookshelf/migrations/0004_alter_books_isbn.py

+# Generated by Django 4.1.7 on 2023-03-27 10:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0003_alter_books_year_published'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='books',
+            name='ISBN',
+            field=models.CharField(default='', max_length=13, null=True, unique=True),
+        ),
+    ]

carlosoarde_reading/bookshelf/models.py

@@ -14,8 +14,8 @@ class Books(models.Model):
         title = models.CharField(max_length=300, default="")
         author = models.ForeignKey(Author, on_delete=models.CASCADE)
         publisher = models.CharField(max_length=300, default="")
-        year_published = models.DateField(null=True, default="")
-        ISBN = models.IntegerField(unique=True, null=True, default="")
+        year_published = models.PositiveIntegerField(null=True, default="")
+        ISBN = models.CharField(unique=True, null=True, max_length=13, default="")
         blurb = models.TextField()
 
         def __str__(self):