Added get_absolute_url() functions to models

gabigarrero_reading/bookshelf/models.py

 from django.db import models
+from django.urls import reverse
 
 class Author(models.Model):
     first_name = models.CharField(max_length = 50)
@@ -10,6 +11,9 @@ class Author(models.Model):
     def __str__(self):
         return self.first_name + ' ' + self.last_name
     
+    def get_absolute_url(self):
+        return reverse("author-detail", kwargs = {"pk": self.pk})
+    
 class Books(models.Model):
     title = models.CharField(max_length = 100)
     author = models.ForeignKey(Author, on_delete = models.CASCADE)
@@ -20,3 +24,6 @@ class Books(models.Model):
     
     def __str__(self):
         return self.title
+    
+    def get_absolute_url(self):
+        return reverse("books-detail", kwargs = {"pk": self.pk})
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