When a song request is fulfilled, update song data.

savepointradio/profiles/apps.py

@@ -5,4 +5,4 @@ class ProfilesConfig(AppConfig):
     name = 'profiles'
 
     def ready(self):
-        from .signals import create_profile
+        from .signals import create_profile, update_song_plays

savepointradio/profiles/signals.py

@@ -1,8 +1,9 @@
 from django.conf import settings
+from django.db.models import F
 from django.db.models.signals import post_save
 from django.dispatch import receiver
 
-from .models import RadioProfile
+from .models import RadioProfile, SongRequest
 
 
 @receiver(post_save, sender=settings.AUTH_USER_MODEL)
@@ -12,3 +13,17 @@ def create_profile(sender, instance, created, **kwargs):
     """
     if created:
         profile, new = RadioProfile.objects.get_or_create(user=instance)
+
+
+@receiver(post_save, sender=SongRequest)
+def update_song_plays(sender, instance, created, update_fields, **kwargs):
+    """
+    Update the song data with the latest play time and the number of times
+    played.
+    """
+    if not created and update_fields:
+        if 'played_at' in update_fields:
+            song = instance.song
+            song.last_played = instance.played_at
+            song.num_played = F('num_played') + 1
+            song.save()