how to turn on horizon debug logging

i have turned on DEBUG = True in local_settings.py, and set the level to DEBUG. but it's still only printing error message. anyone have any idea?

The following is most part of my local_settings.py file:

import os

from django.utils.translation import ugettext_lazy as _

from openstack_dashboard import exceptions

DEBUG = True
TEMPLATE_DEBUG = DEBUG

HORIZON_CONFIG = {
    'dashboards': ('project', 'admin', 'settings',),
    'default_dashboard': 'project',
    'user_home': 'openstack_dashboard.views.get_user_home',
    'ajax_queue_limit': 10,
    'auto_fade_alerts': {
        'delay': 3000,
        'fade_duration': 1500,
        'types': ['alert-success', 'alert-info']
    },
    'help_url': "http://docs.openstack.org",
    'exceptions': {'recoverable': exceptions.RECOVERABLE,
                   'not_found': exceptions.NOT_FOUND,
                   'unauthorized': exceptions.UNAUTHORIZED},
}

LOCAL_PATH = os.path.dirname(os.path.abspath(__file__))

from horizon.utils import secret_key
SECRET_KEY = secret_key.generate_or_read_from_file(os.path.join(LOCAL_PATH, '.secret_key_store'))

CACHES = {
    'default': {
        'BACKEND' : 'django.core.cache.backends.locmem.LocMemCache'
    }
}

# Send email to the console by default
EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'

OPENSTACK_HOST = "127.0.0.1"
OPENSTACK_KEYSTONE_URL = "http://%s:5000/v2.0" % OPENSTACK_HOST
OPENSTACK_KEYSTONE_DEFAULT_ROLE = "Member"

OPENSTACK_KEYSTONE_BACKEND = {
    'name': 'native',
    'can_edit_user': True,
    'can_edit_group': True,
    'can_edit_project': True,
    'can_edit_domain': True,
    'can_edit_role': True
}

OPENSTACK_HYPERVISOR_FEATURES = {
    'can_set_mount_point': True,
}

OPENSTACK_NEUTRON_NETWORK = {
    'enable_lb': False,
    'enable_firewall': False,
    'enable_quotas': True,
    'enable_vpn': False,
    # The profile_support option is used to detect if an external router can be
    # configured via the dashboard. When using specific plugins the
    # profile_support can be turned on if needed.
    #'profile_support': None,
    'profile_support': 'cisco',
}

API_RESULT_LIMIT = 1000
API_RESULT_PAGE_SIZE = 20

# The timezone of the server. This should correspond with the timezone
# of your entire OpenStack installation, and hopefully be in UTC.
TIME_ZONE = "UTC"

LOGGING = {
    'version': 1,
    # When set to True this will disable all logging except
    # for loggers specified in this configuration dictionary. Note that
    # if nothing is specified here and disable_existing_loggers is True,
    # django.db.backends will still log unless it is disabled explicitly.
    'disable_existing_loggers': False,
    'handlers': {
        'null': {
            'level': 'DEBUG',
            'class': 'django.utils.log.NullHandler',
        },
        'console': {
            # Set the level to "DEBUG" for verbose output logging.
            'level': 'DEBUG',
            'class': 'logging.StreamHandler',
        },
    },
    'loggers': {
        # Logging from django.db.backends is VERY verbose, send to null
        # by default.
        'django.db.backends': {
            'handlers': ['null'],
            'propagate': False,
        },
        'requests': {
            'handlers': ['null'],
            'propagate': False,
        },
        'horizon': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'openstack_dashboard': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'novaclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'cinderclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'keystoneclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'glanceclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'neutronclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'heatclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'ceilometerclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
       'troveclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'swiftclient': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'openstack_auth': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'nose.plugins.manager': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'django': {
            'handlers': ['console'],
            'level': 'DEBUG',
            'propagate': False,
        },
        'iso8601': {
            'handlers': ['null'],
            'propagate': False,
        },
    }
}

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