Add MusicGameAnswer model with unique constraints and ordering

game/models.py

@@ -111,3 +111,20 @@ class MusicGameOrder(models.Model):
             models.UniqueConstraint(fields=("game", "order"), name="unique_order"),
         ]
         ordering = ["order"]
+
+
+class MusicGameAnswer(models.Model):
+    game = models.ForeignKey(MusikGame, on_delete=models.CASCADE)
+    player = models.ForeignKey(User, on_delete=models.CASCADE)
+    order = models.PositiveIntegerField()
+    answer = models.ForeignKey(
+        User, on_delete=models.SET_NULL, null=True, related_name="+"
+    )
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(
+                fields=("game", "player", "order"), name="unique_answer"
+            ),
+        ]
+        ordering = ["order"]