修改 submission 的 model，增加是否分享字段。已经 migrate

submission/migrations/0006_submission_shared.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submission', '0005_submission_contest_id'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='submission',
+            name='shared',
+            field=models.BooleanField(default=False),
+        ),
+    ]

submission/models.py

@@ -19,6 +19,8 @@ class Submission(models.Model):
     accepted_answer_time = models.IntegerField(blank=True, null=True)
     # 这个字段只有在题目是accepted 的时候才会用到，比赛题目的提交可能还会有得分等信息，存储在这里面
     accepted_answer_info = models.TextField(blank=True, null=True)
+    # 是否可以分享
+    shared = models.BooleanField(default=False)
 
     class Meta:
         db_table = "submission"