Extend ISBN to include dashes

ram/bookshelf/migrations/0006_alter_book_isbn.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.5 on 2023-10-03 20:43
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookshelf", "0005_alter_book_options"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="book",
+            name="ISBN",
+            field=models.CharField(blank=True, max_length=17),
+        ),
+    ]