add leaderboard

account/api.py

@@ -6,6 +6,7 @@ from ninja.pagination import paginate
 from ninja.errors import HttpError
 from .schemas import (
     BatchUsersIn,
+    LeaderboardEntry,
     UserListSchema,
     UserRegistrationSchema,
     UserLoginSchema,
@@ -119,3 +120,18 @@ def toggle_user_is_active(request, id: int):
         }
     except User.DoesNotExist:
         raise HttpError(404, "查无此人")
+
+
+@router.get("/leaderboard", response=List[LeaderboardEntry])
+def leaderboard(request):
+    from .models import Profile
+    profiles = (
+        Profile.objects
+        .select_related("user")
+        .filter(total_score__gt=0)
+        .order_by("-total_score")
+    )
+    return [
+        LeaderboardEntry(rank=i + 1, username=p.user.username, total_score=p.total_score)
+        for i, p in enumerate(profiles)
+    ]

account/migrations/0002_alter_profile_total_score.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-03-09 11:55
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('account', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='profile',
+            name='total_score',
+            field=models.FloatField(default=0.0),
+        ),
+    ]

account/models.py

@@ -47,14 +47,23 @@ class User(AbstractUser):
 
 class Profile(models.Model):
     user = models.OneToOneField(User, on_delete=models.CASCADE)
-    total_score = models.IntegerField(default=0)
+    total_score = models.FloatField(default=0.0)
 
     def __str__(self):
         return self.user.username
 
-    def update_total_score(self, score: int):
-        self.total_score = self.total_score + score
-        self.save()
+    def recalculate_total_score(self):
+        from django.db.models import Max, Sum
+        from submission.models import Submission
+        total = (
+            Submission.objects
+            .filter(user=self.user, task__task_type="challenge", score__gt=0)
+            .values("task_id")
+            .annotate(best=Max("score"))
+            .aggregate(total=Sum("best"))["total"]
+        ) or 0.0
+        self.total_score = total
+        self.save(update_fields=["total_score"])
 
 
 @receiver(post_save, sender=User)

account/schemas.py

@@ -46,3 +46,9 @@ class UserLoginSchema(Schema):
 class BatchUsersIn(Schema):
     names: List[str]
     classname: str
+
+
+class LeaderboardEntry(Schema):
+    rank: int
+    username: str
+    total_score: float