diff --git a/judge/dispatcher.py b/judge/dispatcher.py
index bdc9a0cb..f96fd4c2 100644
--- a/judge/dispatcher.py
+++ b/judge/dispatcher.py
@@ -101,12 +101,14 @@ class JudgeDispatcher(object):
         if resp["err"]:
             self.submission_obj.result = JudgeStatus.COMPILE_ERROR
         else:
+            # 用时和内存占用保存为多个测试点中最长的那个
+            self.submission_obj.statistic_info["time_cost"] = max([x["cpu_time"] for x in resp["data"]])
+            self.submission_obj.statistic_info["memory_cost"] = max([x["memory"] for x in resp["data"]])
+
             error_test_case = list(filter(lambda case: case["result"] != 0, resp["data"]))
             # 多个测试点全部正确AC，否则 ACM模式下取第一个错误的测试点状态, OI模式对应为部分正确
             if not error_test_case:
                 self.submission_obj.result = JudgeStatus.ACCEPTED
-                # AC 用时保存为多个测试点中最长的那个
-                self.submission_obj.accepted_time = max([x["cpu_time"] for x in resp["data"]])
             elif self.problem_obj.rule_type == ProblemRuleType.ACM:
                 self.submission_obj.result = error_test_case[0]["result"]
             else:
diff --git a/problem/views/oj.py b/problem/views/oj.py
index 2edde238..a6875206 100644
--- a/problem/views/oj.py
+++ b/problem/views/oj.py
@@ -16,7 +16,7 @@ class ProblemAPI(APIView):
         problem_id = request.GET.get("id")
         if problem_id:
             try:
-                problem = Problem.objects.get(id=problem_id, visible=True)
+                problem = Problem.objects.get(_id=problem_id, visible=True)
                 return self.success(ProblemSerializer(problem).data)
             except Problem.DoesNotExist:
                 return self.error("Problem does not exist")
diff --git a/submission/migrations/0003_auto_20170704_1243.py b/submission/migrations/0003_auto_20170704_1243.py
new file mode 100644
index 00000000..58fa83c3
--- /dev/null
+++ b/submission/migrations/0003_auto_20170704_1243.py
@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.6 on 2017-07-04 12:43
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('submission', '0002_auto_20170509_1203'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='submission',
+            old_name='accepted_info',
+            new_name='statistic_info',
+        ),
+        migrations.RemoveField(
+            model_name='submission',
+            name='accepted_time',
+        ),
+    ]
diff --git a/submission/models.py b/submission/models.py
index 2687004c..d690cfe6 100644
--- a/submission/models.py
+++ b/submission/models.py
@@ -30,9 +30,8 @@ class Submission(models.Model):
     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={})
+    # 存储该提交所用时间和内存值，方便提交列表显示
+    statistic_info = JSONField(default={})
 
     class Meta:
         db_table = "submission"
diff --git a/submission/serializers.py b/submission/serializers.py
index da439458..8b79970a 100644
--- a/submission/serializers.py
+++ b/submission/serializers.py
@@ -1,4 +1,5 @@
 from .models import Submission
+from account.models import User
 from utils.api import serializers
 from judge.languages import language_names
 
@@ -10,8 +11,13 @@ class CreateSubmissionSerializer(serializers.Serializer):
 
 
 class SubmissionModelSerializer(serializers.ModelSerializer):
+    username = serializers.SerializerMethodField()
     info = serializers.JSONField()
-    accepted_info = serializers.JSONField()
+    statistic_info = serializers.JSONField()
 
     class Meta:
         model = Submission
+
+    @staticmethod
+    def get_username(obj):
+        return User.objects.get(id=obj.user_id).username
diff --git a/submission/views/oj.py b/submission/views/oj.py
index f13e3c9e..57172b7b 100644
--- a/submission/views/oj.py
+++ b/submission/views/oj.py
@@ -28,14 +28,14 @@ def _submit(response, user, problem_id, language, code, contest_id=None):
         return response.error("Please wait %d seconds" % int(bucket.expected_time() + 1))
 
     try:
-        problem = Problem.objects.get(id=problem_id)
+        problem = Problem.objects.get(_id=problem_id)
     except Problem.DoesNotExist:
         return response.error("Problem not exist")
 
     submission = Submission.objects.create(user_id=user.id,
                                            language=language,
                                            code=code,
-                                           problem_id=problem.id,
+                                           problem_id=problem._id,
                                            contest_id=contest_id)
     # todo 暂时保留 方便排错
     # JudgeDispatcher(submission.id, problem.id).judge()
@@ -60,8 +60,13 @@ class SubmissionAPI(APIView):
                 return self.error("Submission not exist")
             return self.success(SubmissionModelSerializer(submission).data)
 
+        contest_id = request.GET.get("contest_id")
+        if contest_id:
+            subs = Submission.objects.filter(contest_id__isnull=False)
+        else:
+            subs = Submission.objects.filter(contest_id__isnull=True)
+
         problem_id = request.GET.get("problem_id")
-        subs = Submission.objects.filter(contest_id__isnull=True)
         if problem_id:
             subs = subs.filter(problem_id=problem_id)