add migration to correct database record; rejudge function now can work normally.

submission/migrations/0010_fix_submission_number.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations
+from django.db.models import Count
+
+
+def fix_rejudge_bugs(apps, schema_editor):
+    Submission = apps.get_model("submission", "Submission")
+    Problem = apps.get_model("problem", "Problem")
+    User = apps.get_model("account", "User")
+
+    for item in Problem.objects.filter(contest__isnull=True):
+        submissions = Submission.objects.filter(problem=item)
+        item.submission_number = submissions.count()
+        results_count = submissions.annotate(count=Count('result')).values('result', 'count')
+        for stat in results_count:
+            if stat["result"] == 0:
+                item.accepted_number = stat["count"]
+            item.statistic_info[str(stat)] = stat["count"]
+        item.save(update_fields=["submission_number", "accepted_number", "statistic_info"])
+
+    for user in User.objects.all():
+        submissions = Submission.objects.filter(user_id=user.id)
+        profile = user.userprofile
+        profile.submission_number = submissions.count()
+        profile.accepted_number = submissions.filter(result=0).count()
+        profile.save(update_fields=["submission_number", "accepted_number"])
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('submission', '0009_delete_user_output'),
+    ]
+
+    operations = [
+        migrations.RunPython(fix_rejudge_bugs, reverse_code=migrations.RunPython.noop)
+    ]