Merge branch 'chiaki_dev' into zemal_dev

* chiaki_dev:
  fix ci
  Add submission module

# Conflicts:
#	requirements.txt

submission/models.py

@@ -0,0 +1,42 @@
+from django.db import models
+from jsonfield import JSONField
+
+from utils.models import RichTextField
+from utils.shortcuts import rand_str
+
+
+class JudgeStatus:
+    COMPILE_ERROR = -2
+    WRONG_ANSWER = -1
+    ACCEPTED = 0
+    CPU_TIME_LIMIT_EXCEEDED = 1
+    REAL_TIME_LIMIT_EXCEEDED = 2
+    MEMORY_LIMIT_EXCEEDED = 3
+    RUNTIME_ERROR = 4
+    SYSTEM_ERROR = 5
+    PENDING = 6
+    JUDGING = 7
+    PARTIALLY_ACCEPTED = 8
+
+
+class Submission(models.Model):
+    id = models.CharField(max_length=32, default=rand_str, primary_key=True, db_index=True)
+    contest_id = models.IntegerField(db_index=True, null=True)
+    problem_id = models.IntegerField(db_index=True)
+    created_time = models.DateTimeField(auto_now_add=True)
+    user_id = models.IntegerField(db_index=True)
+    code = RichTextField()
+    result = models.IntegerField(default=JudgeStatus.PENDING)
+    # 判题结果的详细信息
+    info = JSONField(default={})
+    language = models.CharField(max_length=20)
+    shared = models.BooleanField(default=False)
+    # 题目状态为 Accepted 时才会存储相关info
+    accepted_time = models.IntegerField(blank=True, null=True)
+    accepted_info = JSONField(default={})
+
+    class Meta:
+        db_table = "submission"
+
+    def __str__(self):
+        return self.id