向 Django 信号添加参数
如何向 Django 信号添加参数以便关联的接收器可以使用这些参数？阅读文档我无法弄清楚自己。谢谢
示例：
def callback(sender, instance, **kwargs):
# I want to work with extra here!
extra = kwargs.get(extra, None)
if extra:
# do something with extra
pass
接收器以这种方式连接到信号：
pre_save.connect(callback)
how do I add arguments to Django signals so that the associated receiver can use those arguments? Reading the docs I've not been able to figure myself. Thanks
Example:
def callback(sender, instance, **kwargs):
# I want to work with extra here!
extra = kwargs.get(extra, None)
if extra:
# do something with extra
pass
The receiver is connected to the signal this way:
pre_save.connect(callback)
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pre_save不是您发送的信号，而是 Django 默认发出的：更改其参数可能非常复杂，并且可能会破坏某些东西。在您定义的信号上，您可以添加所需的所有参数；要了解如何操作，请查看文档（由 @Ignacio 友情链接）。
pre_saveis not a signal that you send, but rather Django emits it by default: changing its arguments is probably very complicated and likely to break things.On signals you define, you can add all the arguments you want; to see how, look at the docs (kindly linked by @Ignacio).