Populate models

garethcastillo_reading/bookshelf/migrations/0002_alter_books_blurb.py

+# Generated by Django 4.1.6 on 2023-03-28 11:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='books',
+            name='blurb',
+            field=models.TextField(default='', max_length=400),
+        ),
+    ]

garethcastillo_reading/bookshelf/migrations/0003_alter_books_isbn.py

+# Generated by Django 4.1.6 on 2023-03-28 11:41
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0002_alter_books_blurb'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='books',
+            name='isbn',
+            field=models.PositiveBigIntegerField(validators=[django.core.validators.MinLengthValidator(13), django.core.validators.MaxLengthValidator(13)]),
+        ),
+    ]

garethcastillo_reading/bookshelf/migrations/0004_alter_books_isbn.py

+# Generated by Django 4.1.6 on 2023-03-28 11:46
+
+import django.core.validators
+from django.db import migrations, models
+import re
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('bookshelf', '0003_alter_books_isbn'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='books',
+            name='isbn',
+            field=models.CharField(default='0000000000000', max_length=13, validators=[django.core.validators.RegexValidator(re.compile('^\\d+(?:\\d+)*\\Z'), code='invalid', message=None), django.core.validators.MinLengthValidator(13)]),
+        ),
+    ]

garethcastillo_reading/bookshelf/models.py

 from django.db import models
-from django.core.validators import MinValueValidator, MaxValueValidator
+from django.core.validators import MinValueValidator, MaxValueValidator, MinLengthValidator, MaxLengthValidator, int_list_validator
 import datetime
 
 class Author(models.Model):
@@ -19,8 +19,8 @@ class Books(models.Model):
     author = models.ForeignKey(Author, on_delete = models.PROTECT)
     publisher = models.CharField(max_length = 200, default = default_string)
     year_published = models.IntegerField(validators = [MaxValueValidator(datetime.datetime.now().year)], default = datetime.datetime.now().year)
-    isbn = models.IntegerField(validators = [MinValueValidator(1), MaxValueValidator(9999999999999)], default = 0)
-    blurb = models.TextField(max_length = 200, default = default_string)
+    isbn = models.CharField(max_length=13, validators=[int_list_validator(sep=''),MinLengthValidator(13),], default='0000000000000')
+    blurb = models.TextField(max_length = 400, default = default_string)
 
     def __str__(self):
         return '{}'.format(self.title)