adds track loading example

backend/playlist/models/track.py

@@ -104,6 +104,11 @@ class Track(models.Model):
             artists = list(map(lambda a:a.name, self.artists.all()))
             return " & ".join(artists)
 
+    @property
+    def album_cover(self):
+        if self.album:
+            return self.album.image_url
+
     @property
     def name_sanitized(self):
         return re.match("[^\-\(]*\w", self.name)[0]