[GitHub] [pulsar] se7enkings commented on issue #4622: [pulsar-dashboard]Dashboard report MultipleObjectsReturned

[GitBox <gi...@apache.org>]

se7enkings commented on issue #4622: [pulsar-dashboard]Dashboard report MultipleObjectsReturned
URL: https://github.com/apache/pulsar/issues/4622#issuecomment-506657086
 
 
   **Screenshots**
   ```
   Environment:
   
   Request Method: GET
   Request URL: http://{dashboard}:8780/stats/topic/persistent/test-signal/test-replication/msgsync-partition-14/
   
   Django Version: 1.11.20
   Python Version: 2.7.16
   Installed Applications:
   ['stats.apps.StatsConfig',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.humanize']
   Installed Middleware:
   ['django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware']
   
   
   
   Traceback:
   
   File "/usr/local/lib/python2.7/site-packages/django/core/handlers/exception.py" in inner
     41.             response = get_response(request)
   
   File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
     187.                 response = self.process_exception_by_middleware(e, request)
   
   File "/usr/local/lib/python2.7/site-packages/django/core/handlers/base.py" in _get_response
     185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)
   
   File "./stats/views.py" in topic
     132.         topic = get_object_or_404(Topic, name=topic_name, timestamp=timestamp)
   
   File "/usr/local/lib/python2.7/site-packages/django/shortcuts.py" in get_object_or_404
     85.         return queryset.get(*args, **kwargs)
   
   File "/usr/local/lib/python2.7/site-packages/django/db/models/query.py" in get
     384.             (self.model._meta.object_name, num)
   
   Exception Type: MultipleObjectsReturned at /stats/topic/persistent/online-signal/signal-replication/msgsync-partition-14/
   Exception Value: get() returned more than one Topic -- it returned 2!
   ```
   - If we change the line 132 to "topic = get_list_or_404(Topic, name=topic_name, timestamp=timestamp)",  the value of "topic" will be :
   `[<Topic: persistent://test-signal/test-replication/msgsync-partition-14>, <Topic: persistent://test-signal/test-replication/msgsync-partition-14>]`
   
   

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