Added cascade to the foreign key parameters

homepage/models.py

@@ -22,12 +22,12 @@ class Artist(models.Model):
 
 class Album(models.Model):
     album_name = models.CharField()
-    artist = models.ForeignKey(Artist)
+    artist = models.ForeignKey(Artist, on_delete=models.CASCADE)
     description = models.CharField()
     release_date = models.IntegerField()
 
 class Song(models.Model):
     song_title = models.CharField()
-    artist  = models.ForeignKey(Artist)
-    album = models.ForeignKey(Album)
+    artist  = models.ForeignKey(Artist, on_delete=models.CASCADE)
+    album = models.ForeignKey(Album, on_delete=models.CASCADE)
     song_length = models.IntegerField()
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