为User problems_status 添加默认值，并精简了相关代码

account/migrations/0003_auto_20150915_2025.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import models, migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('account', '0002_user_problems_status'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='user',
+            name='problems_status',
+            field=models.TextField(default=b'{}'),
+        ),
+    ]

account/models.py

@@ -31,8 +31,7 @@ class User(AbstractBaseUser):
     # 0代表不是管理员 1是普通管理员 2是超级管理员
     admin_type = models.IntegerField(default=0)
     # JSON字典用来表示该用户的问题的解决状态 1为ac，2为正在进行
-    problems_status = models.TextField(blank=True)
-
+    problems_status = models.TextField(default="{}")
 
     USERNAME_FIELD = 'username'
     REQUIRED_FIELDS = []

mq/scripts/info.py

@@ -43,10 +43,7 @@ class MessageQueue(object):
                 except User.DoesNotExist:
                     logger.warning("Submission user does not exist, submission_id: " + submission_id)
                     continue
-                if user.problems_status:
                 problems_status = json.loads(user.problems_status)
-                else:
-                    problems_status = {}
                 problems_status[str(problem.id)] = 1
                 user.problems_status = json.dumps(problems_status)
                 user.save()

problem/views.py

@@ -282,7 +282,7 @@ def problem_list_page(request, page=1):
     except Exception:
         pass
 
-    if request.user.is_authenticated() and request.user.problems_status:
+    if request.user.is_authenticated():
         problems_status = json.loads(request.user.problems_status)
     else:
         problems_status = {}

submission/views.py

@@ -47,10 +47,7 @@ class SubmissionAPIView(APIView):
             except Exception:
                 return error_response(u"提交判题任务失败")
             # 修改用户解题状态
-            if request.user.problems_status:
             problems_status = json.loads(request.user.problems_status)
-            else:
-                problems_status = {}
             problems_status[str(data["problem_id"])] = 2
             request.user.problems_status = json.dumps(problems_status)
             request.user.save()