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import sys
from django.conf import settings
from django.core.signals import request_started, request_finished, \
got_request_exception
from django.db.models.signals import class_prepared, pre_init, post_init, \
pre_save, post_save, pre_delete, post_delete, post_syncdb
from django.dispatch.dispatcher import WEAKREF_TYPES
from django.utils.translation import ugettext_lazy as _
try:
from django.db.backends.signals import connection_created
except ImportError:
connection_created = None
from debug_toolbar.panels import DebugPanel
class SignalDebugPanel(DebugPanel):
name = "Signals"
template = 'debug_toolbar/panels/signals.html'
has_content = True
SIGNALS = {
'request_started': request_started,
'request_finished': request_finished,
'got_request_exception': got_request_exception,
'connection_created': connection_created,
'class_prepared': class_prepared,
'pre_init': pre_init,
'post_init': post_init,
'pre_save': pre_save,
'post_save': post_save,
'pre_delete': pre_delete,
'post_delete': post_delete,
'post_syncdb': post_syncdb,
}
def nav_title(self):
return _("Signals")
def nav_subtitle(self):
signals = self.get_stats()['signals']
num_receivers = sum(len(s[2]) for s in signals)
num_signals = len(signals)
return '%d %s from %d %s' % (
num_receivers,
(num_receivers == 1) and 'receiver' or 'receivers',
num_signals,
(num_signals == 1) and 'signal' or 'signals',
)
def title(self):
return _("Signals")
def url(self):
return ''
def signals(self):
signals = self.SIGNALS.copy()
if hasattr(settings, 'DEBUG_TOOLBAR_CONFIG'):
extra_signals = settings.DEBUG_TOOLBAR_CONFIG.get('EXTRA_SIGNALS', [])
else:
extra_signals = []
for signal in extra_signals:
parts = signal.split('.')
path = '.'.join(parts[:-1])
__import__(path)
signals[parts[-1]] = getattr(sys.modules[path], parts[-1])
return signals
signals = property(signals)
def process_response(self, request, response):
signals = []
for name, signal in sorted(self.signals.items(), key=lambda x: x[0]):
if signal is None:
continue
receivers = []
for (receiverkey, r_senderkey), receiver in signal.receivers:
if isinstance(receiver, WEAKREF_TYPES):
receiver = receiver()
if receiver is None:
continue
receiver = getattr(receiver, '__wraps__', receiver)
receiver_name = getattr(receiver, '__name__', str(receiver))
if getattr(receiver, 'im_self', None) is not None:
text = "%s.%s" % (getattr(receiver.im_self, '__class__', type).__name__, receiver_name)
elif getattr(receiver, 'im_class', None) is not None:
text = "%s.%s" % (receiver.im_class.__name__, receiver_name)
else:
text = "%s" % receiver_name
receivers.append(text)
signals.append((name, signal, receivers))
self.record_stats({'signals': signals})
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