Fix race in chat ignore

chat_box/models.py

@@ -58,8 +58,8 @@ class Ignore(models.Model):
     @classmethod
     def get_ignored_users(self, user):
         try:
-            return self.objects.get(user=user).ignored_users.all()
-        except Ignore.DoesNotExist:
+            return self.objects.filter(user=user)[0].ignored_users.all()
+        except:
             return Profile.objects.none()
 
     @classmethod

judge/models/problem.py

@@ -406,6 +406,7 @@ class Problem(models.Model):
             ('change_public_visibility', 'Change is_public field'),
             ('change_manually_managed', 'Change is_manually_managed field'),
             ('see_organization_problem', 'See organization-private problems'),
+            ('suggest_problem_changes', 'Suggest changes to problem'),
         )
         verbose_name = _('problem')
         verbose_name_plural = _('problems')