HTTP 500 in analysis API due to AttributeError in get_object_list()

[hackdna]

• Specific code commit: v1.6.7
• Version of the web browser and OS: N/A
• Environment where the error occurred: AWS

Steps to reproduce

Unknown, error report received by email:

Internal Server Error: /api/v1/analysis/
Traceback (most recent call last):
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/tastypie/resources.py", line 202, in wrapper
    response = callback(request, *args, **kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/tastypie/resources.py", line 433, in dispatch_list
    return self.dispatch('list', request, **kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/tastypie/resources.py", line 465, in dispatch
    response = method(request, **kwargs)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/tastypie/resources.py", line 1287, in get_list
    objects = self.obj_get_list(bundle=base_bundle, **self.remove_api_resource_names(kwargs))
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/tastypie/resources.py", line 2071, in obj_get_list
    objects = self.apply_filters(bundle.request, applicable_filters)
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/tastypie/resources.py", line 2043, in apply_filters
    return self.get_object_list(request).filter(**applicable_filters)
  File "/srv/refinery-platform/refinery/core/api.py", line 992, in get_object_list
    ExtendedGroup.objects.public_group(), perm, DataSet
  File "/home/ubuntu/.virtualenvs/refinery-platform/lib/python2.7/site-packages/guardian/shortcuts.py", line 701, in get_objects_for_group
    global_perm_set = group.permissions.values_list('codename', flat=True)
AttributeError: 'NoneType' object has no attribute 'permissions'

Request repr():
<WSGIRequest
path:/api/v1/analysis/,
GET:<QueryDict: {u'order_by': [u'-time_start'], u'limit': [u'0'], u'status__in': [u'RUNNING,UNKNOWN'], u'data_set__uuid': [u'ba2ef829-b7a5-48c1-b631-6349b1e9b3df'], u'format': [u'json']}>,
POST:<QueryDict: {}>,
COOKIES:{'_ga': 'GA1.2.1008158846.1448040184',
'_gid': 'GA1.2.674716005.1549456100',
'csrftoken': <redacted>},
META:{'CONTEXT_DOCUMENT_ROOT': '/var/www',
'CONTEXT_PREFIX': '',
u'CSRF_COOKIE': <redacted>,
'DOCUMENT_ROOT': '/var/www',
'GATEWAY_INTERFACE': 'CGI/1.1',
'HTTP_ACCEPT': 'application/json, text/plain, */*',
'HTTP_ACCEPT_ENCODING': 'gzip, deflate, br',
'HTTP_ACCEPT_LANGUAGE': 'en-US,en;q=0.5',
'HTTP_CONNECTION': 'keep-alive',
'HTTP_COOKIE': '_ga=GA1.2.1008158846.1448040184; csrftoken=<redacted>; _gid=GA1.2.674716005.1549456100',
'HTTP_HOST': 'hsci.stemcellcommons.org',
'HTTP_REFERER': 'https://hsci.stemcellcommons.org/data_sets/ba2ef829-b7a5-48c1-b631-6349b1e9b3df/',
'HTTP_USER_AGENT': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:65.0) Gecko/20100101 Firefox/65.0',
'HTTP_X_CSRFTOKEN': <redacted>,
'HTTP_X_FORWARDED_FOR': '134.174.140.197',
'HTTP_X_FORWARDED_PORT': '443',
'HTTP_X_FORWARDED_PROTO': 'https',
'PATH_INFO': u'/api/v1/analysis/',
'PATH_TRANSLATED': '/srv/refinery-platform/refinery/config/wsgi_aws.py/api/v1/analysis/',
'QUERY_STRING': 'data_set__uuid=ba2ef829-b7a5-48c1-b631-6349b1e9b3df&format=json&limit=0&order_by=-time_start&status__in=RUNNING,UNKNOWN',
'REMOTE_ADDR': '172.30.0.113',
'REMOTE_PORT': '64188',
'REQUEST_METHOD': 'GET',
'REQUEST_SCHEME': 'http',
'REQUEST_URI': '/api/v1/analysis/?data_set__uuid=ba2ef829-b7a5-48c1-b631-6349b1e9b3df&format=json&limit=0&order_by=-time_start&status__in=RUNNING,UNKNOWN',
'SCRIPT_FILENAME': '/srv/refinery-platform/refinery/config/wsgi_aws.py',
'SCRIPT_NAME': u'',
'SCRIPT_URI': 'http://hsci.stemcellcommons.org/api/v1/analysis/',
'SCRIPT_URL': '/api/v1/analysis/',
'SERVER_ADDR': '172.30.0.60',
'SERVER_ADMIN': '[no address given]',
'SERVER_NAME': 'hsci.stemcellcommons.org',
'SERVER_PORT': '80',
'SERVER_PROTOCOL': 'HTTP/1.1',
'SERVER_SIGNATURE': '',
'SERVER_SOFTWARE': 'Apache/2.4.7 (Ubuntu)',
'mod_wsgi.application_group': 'hsci.stemcellcommons.org|',
'mod_wsgi.callable_object': 'application',
'mod_wsgi.enable_sendfile': '0',
'mod_wsgi.handler_script': '',
'mod_wsgi.input_chunked': '0',
'mod_wsgi.listener_host': '',
'mod_wsgi.listener_port': '80',
'mod_wsgi.process_group': 'refinery',
'mod_wsgi.queue_start': '1549456377093605',
'mod_wsgi.request_handler': 'wsgi-script',
'mod_wsgi.script_reloading': '1',
'mod_wsgi.version': (3, 4),
'wsgi.errors': <mod_wsgi.Log object at 0x7f1d999c5a70>,
'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0x7f1d9914e990>,
'wsgi.input': <mod_wsgi.Input object at 0x7f1d99e11670>,
'wsgi.multiprocess': False,
'wsgi.multithread': True,
'wsgi.run_once': False,
'wsgi.url_scheme': 'http',
'wsgi.version': (1, 0)}>

Observed behavior

Internal server error

Expected behavior

No internal server error