fixed formating for models

bookshelf/models.py

@@ -9,6 +9,15 @@ class Author(models.Model):
     nationality = models.CharField(max_length=50)
     bio = models.CharField(max_length=700)
 
+    def __str__(self):
+        return '''{}, {}, {}, {}, {}'''.format(
+            self.first_name,
+            self.last_name,
+            self.age,
+            self.nationality,
+            self.bio,
+            )
+
 
 class Books(models.Model):
     title = models.CharField(max_length=125)
@@ -17,3 +26,13 @@ class Books(models.Model):
     year_published = models.IntegerField(max_length=100)
     isbn = models.CharField(max_length=13)
     blurb = models.TextField()
+
+    def __str__(self):
+        return '''{}, {}, {}, {}, {}, {}'''.format(
+            self.title,
+            self.author,
+            self.publisher,
+            self.year_published,
+            self.isbn,
+            self.blurb,
+        )