移除time_zone,修复problem越权

account/models.py

@@ -80,7 +80,6 @@ class UserProfile(models.Model):
     school = models.CharField(max_length=200, blank=True, null=True)
     major = models.CharField(max_length=200, blank=True, null=True)
     student_id = models.CharField(max_length=15, blank=True, null=True)
-    time_zone = models.CharField(max_length=32, blank=True, null=True)
     language = models.CharField(max_length=32, blank=True, null=True)
     # for ACM
     accepted_number = models.IntegerField(default=0)

account/views/oj.py

@@ -247,7 +247,7 @@ class UserRegisterAPI(APIView):
         user = User.objects.create(username=data["username"], email=data["email"])
         user.set_password(data["password"])
         user.save()
-        UserProfile.objects.create(user=user, time_zone=settings.USER_DEFAULT_TZ)
+        UserProfile.objects.create(user=user)
         return self.success("Succeeded")