[BUG] Dashboard error: If usages[' subnets ' [' available '] <= 0:keyerror: ' Available '

OpenStack Version number: Liberty

System platform: CentOS 7.2 64bit

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1. Phenomenon:

Administrator login Dasgboard, view project Network Network "Select a network" Select a subnet "To view the network ID, such as the following:

View httpd log errors such as the following:

Tail-f/etc/httpd/logs/error_log[tue APR 10:24:08.830778] [: ERROR] [PID 94866] Error while checking action permis Sions. [Tue APR 12 10:24:08.830848 2016] [: ERROR] [PID 94866] Traceback (most recent): [Tue Apr 10:24:08.830854] [: ERROR] [pid 94866] File "/usr/lib/python2.7/site-p ackages/horizon/tables/base.py ", line 1270, in _filter_action[tue APR 10:24:08.830859] [: ERROR] [PID 94866] Re Turn action._allowed (Request, Datum) and Row_matched[tue Apr 10:24:08.830862] [: ERROR] [pid 94866] File "/usr/li b/python2.7/site-packages/horizon/tables/actions.py ", line 135, in _allowed[tue Apr 10:24:08.830866] [: ERROR] [ PID 94866] self.allowed (Request, Datum)) [Tue Apr 10:24:08.830873] [: ERROR] [pid 94866] File "/usr/share/open stack-dashboard/openstack_dashboard/wsgi/. /.. /openstack_dashboard/dashboards/project/networks/subnets/tables.py ", line 103, Allowed[tue APR 12 10:24:08.830883 "[: ERROR] [pid 94866] if usages[' SubneTS ' [' available '] <= 0:[tue Apr 10:24:08.830899] [: ERROR] [pid 94866] keyerror: ' Available ' 

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2. Problem solving:

change/usr/share/openstack-dashboard/openstack_dashboard/dashboards/project/networks/subnets/tables.py source code such as the following :

Class Createsubnet (Subnetpolicytargetmixin, checknetworkeditable,                   tables. linkaction):    name = "Create"    Verbose_name = _ ("Create Subnet")    url = "Horizon:project:networks:addsubnet"    classes = ("Ajax-modal",)    icon = "Plus"    policy_rules = (("Network", "Create_subnet"),    def GET_LINK_ URL (self, datum=none):        network_id = self.table.kwargs[' network_id ']        return reverse (Self.url, args= (Network_ ID,))    def allowed (self, request, Datum=none):        usages = quotas.tenant_quota_usages (request)        if usages[ ' Subnets '].get (' available ', 1) <= 0:            if ' disabled ' not in self.classes:                self.classes = [C for C in Self.class ES] + [' disabled ']                Self.verbose_name = _ (' Create Subnet (Quota exceeded) ')        else:            Self.verbose_name = _ (' Create Subnet ')            self.classes = [C for C in self.classes if c! = ' disabled ']        return True

[BUG] Dashboard error: If usages[' subnets ' [' available '] <= 0:keyerror: ' Available '