101 lines
3.3 KiB
Python
101 lines
3.3 KiB
Python
import weakref
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from django.core.signals import (
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got_request_exception,
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request_finished,
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request_started,
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setting_changed,
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)
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from django.db.backends.signals import connection_created
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from django.db.models.signals import (
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class_prepared,
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m2m_changed,
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post_delete,
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post_init,
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post_migrate,
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post_save,
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pre_delete,
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pre_init,
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pre_migrate,
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pre_save,
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)
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from django.utils.module_loading import import_string
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from django.utils.translation import gettext_lazy as _, ngettext
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from debug_toolbar.panels import Panel
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class SignalsPanel(Panel):
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template = "debug_toolbar/panels/signals.html"
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SIGNALS = {
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"request_started": request_started,
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"request_finished": request_finished,
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"got_request_exception": got_request_exception,
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"connection_created": connection_created,
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"class_prepared": class_prepared,
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"pre_init": pre_init,
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"post_init": post_init,
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"pre_save": pre_save,
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"post_save": post_save,
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"pre_delete": pre_delete,
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"post_delete": post_delete,
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"m2m_changed": m2m_changed,
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"pre_migrate": pre_migrate,
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"post_migrate": post_migrate,
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"setting_changed": setting_changed,
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}
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def nav_subtitle(self):
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signals = self.get_stats()["signals"]
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num_receivers = sum(len(receivers) for name, receivers in signals)
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num_signals = len(signals)
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# here we have to handle a double count translation, hence the
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# hard coding of one signal
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if num_signals == 1:
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return ngettext(
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"%(num_receivers)d receiver of 1 signal",
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"%(num_receivers)d receivers of 1 signal",
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num_receivers,
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) % {"num_receivers": num_receivers}
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return ngettext(
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"%(num_receivers)d receiver of %(num_signals)d signals",
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"%(num_receivers)d receivers of %(num_signals)d signals",
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num_receivers,
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) % {"num_receivers": num_receivers, "num_signals": num_signals}
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title = _("Signals")
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@property
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def signals(self):
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signals = self.SIGNALS.copy()
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for signal in self.toolbar.config["EXTRA_SIGNALS"]:
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signal_name = signal.rsplit(".", 1)[-1]
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signals[signal_name] = import_string(signal)
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return signals
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def generate_stats(self, request, response):
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signals = []
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for name, signal in sorted(self.signals.items()):
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receivers = []
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for receiver in signal.receivers:
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receiver = receiver[1]
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if isinstance(receiver, weakref.ReferenceType):
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receiver = receiver()
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if receiver is None:
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continue
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receiver = getattr(receiver, "__wraps__", receiver)
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receiver_name = getattr(receiver, "__name__", str(receiver))
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if getattr(receiver, "__self__", None) is not None:
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receiver_class_name = getattr(
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receiver.__self__, "__class__", type
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).__name__
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text = f"{receiver_class_name}.{receiver_name}"
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else:
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text = receiver_name
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receivers.append(text)
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signals.append((name, receivers))
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self.record_stats({"signals": signals})
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