created the models for the bookshelf app

janang_reading/bookshelf/models.py

 from django.db import models
 
 # Create your models here.
+class Author(models.Model):
+    first_name = models.CharField()
+    last_name = models.CharField()
+    age = models.IntegerField()
+    nationality = models.CharField()
+    bio = models.TextField(max_length=700, default="")
+
+    def __str__(self):
+        return self.first_name + self.last_name
+    
+class Books(models.Model):
+    title = models.CharField()
+    author = models.ForeignKey(Author, on_delete=models.CASCADE)
+    publisher = models.CharField()
+    year_published = models.IntegerField()
+    ISBN = models.IntegerField()
+    blurb = models.TextField()
+
+    def __str__(self):
+        return self.title
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