added function in models.py

added get_absolute_url per class

layvillanueva_music/homepage/models.py

@@ -8,6 +8,9 @@ class Artist(models.Model):
     def __str__(self):
         return '{} - {} monthly listeners'.format(self.artist_name,self.monthly_listeners)
 
+    def get_absolute_url(self):
+        return reverse('artist_detail', args=[str(self.artist_name)])
+
 
 class Album(models.Model):
     album_name = models.CharField(max_length=255)
@@ -19,6 +22,9 @@ class Album(models.Model):
         return '{} by {} released on {} is {}'.format(self.album_name,self.artist,
         self.release_date,self.description)
     
+    def get_absolute_url(self):
+        return reverse('album_detail', args=[str(self.album_name)])
+
 class Song(models.Model):
     song_title = models.CharField(max_length=255)
     artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
@@ -28,3 +34,6 @@ class Song(models.Model):
     def __str__(self):
         return '{} by {} from {} is {} long.'.format(self.song_title,self.artist,
         self.album,self.song_length)
+
+    def get_absolute_url(self):
+        return reverse('song_detail', args=[str(self.song_title)])