Built models, such as Author and Books, for the bookshelf app

elaizabolislis_reading/bookshelf/migrations/0001_initial.py

+# Generated by Django 4.1.7 on 2023-03-27 08:07
+
+import django.core.validators
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Author',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('first_name', models.CharField(max_length=255)),
+                ('last_name', models.CharField(max_length=255)),
+                ('age', models.IntegerField()),
+                ('nationality', models.CharField(max_length=255)),
+                ('bio', models.TextField(max_length=700)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Books',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=255)),
+                ('publisher', models.CharField(max_length=150)),
+                ('year_published', models.PositiveIntegerField(choices=[(1000, 1000), (1001, 1001), (1002, 1002), (1003, 1003), (1004, 1004), (1005, 1005), (1006, 1006), (1007, 1007), (1008, 1008), (1009, 1009), (1010, 1010), (1011, 1011), (1012, 1012), (1013, 1013), (1014, 1014), (1015, 1015), (1016, 1016), (1017, 1017), (1018, 1018), (1019, 1019), (1020, 1020), (1021, 1021), (1022, 1022), (1023, 1023), (1024, 1024), (1025, 1025), (1026, 1026), (1027, 1027), (1028, 1028), (1029, 1029), (1030, 1030), (1031, 1031), (1032, 1032), (1033, 1033), (1034, 1034), (1035, 1035), (1036, 1036), (1037, 1037), (1038, 1038), (1039, 1039), (1040, 1040), (1041, 1041), (1042, 1042), (1043, 1043), (1044, 1044), (1045, 1045), (1046, 1046), (1047, 1047), (1048, 1048), (1049, 1049), (1050, 1050), (1051, 1051), (1052, 1052), (1053, 1053), (1054, 1054), (1055, 1055), (1056, 1056), (1057, 1057), (1058, 1058), (1059, 1059), (1060, 1060), (1061, 1061), (1062, 1062), (1063, 1063), (1064, 1064), (1065, 1065), 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+                ('ISBN', models.PositiveIntegerField(default=1000000000000, validators=[django.core.validators.MaxValueValidator(9999999999999), django.core.validators.MinValueValidator(1000000000000)])),
+                ('blurb', models.TextField(max_length=1000)),
+                ('author', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='bookshelf.author')),
+            ],
+        ),
+    ]

elaizabolislis_reading/bookshelf/models.py

 from django.db import models
+from django.core.validators import MaxValueValidator, MinValueValidator
+import datetime
 
-# Create your models here.
+
+class Author(models.Model):
+    first_name = models.CharField(max_length=255)
+    last_name = models.CharField(max_length=255)
+    age = models.IntegerField()
+    nationality = models.CharField(max_length=255)
+    bio = models.TextField(max_length=700)
+
+    def __str__(self):
+        return '{} {}'.format(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=150)
+    YEAR_PUBLISHED_CHOICES = [
+        (r, r)for r in range(1000, datetime.date.today().year+1)
+    ]
+    year_published = models.PositiveIntegerField(
+        choices=YEAR_PUBLISHED_CHOICES,
+        default=datetime.date.today().year
+    )
+    ISBN = models.PositiveIntegerField(validators=[
+        MaxValueValidator(9999999999999),
+        MinValueValidator(1000000000000)],
+        default=1000000000000
+    )
+    blurb = models.TextField(max_length=1000)
+
+    def __str__(self):
+        return '{} ({}) by {}'.format(self.title, self.year_published, self.author)