修复 MySQL 上时间戳字段溢出的问题

submission/migrations/0008_auto_20151208_2106.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9 on 2015-12-08 13:06
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submission', '0007_auto_20151207_1645'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='submission',
+            name='judge_end_time',
+            field=models.BigIntegerField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='submission',
+            name='judge_start_time',
+            field=models.BigIntegerField(blank=True, null=True),
+        ),
+    ]