python - Django 信号不起作用

Question

我的 models.py:>

class Aval(models.Model):
    cliente = models.ForeignKey(Cliente)
    salao = models.ForeignKey(Salao)
    rate = models.IntegerField(choices=RATE, default=5)
    criacao = models.DateTimeField(blank=True, null=True, auto_now=True)
    comentario = models.TextField(max_length=400, blank=True, null=True, default=None)
    aprovado = models.BooleanField(default=False)

我的signals.py:>

@receiver(post_save, sender=Aval)
def new_rate(sender, instance, created, **kwargs):
    aval = instance

    print("Aval is saved.")

我正在测试 Aval 模型的信号 post_save，当我保存一些对象 Aval 时它不打印“Aval is saved”。我做错了什么？

Answer 1

Django < 1.7 的原始答案:

你应该包括:

import signals

到您的应用程序的 __init__.py 文件。

编辑:Django >= 1.7:

信号可以在django.apps.AppConfig.ready中注册
如信号中所述 documentation和 AppConfig doc

Where should this code live?

Strictly speaking, signal handling and registration code can live anywhere you like, although it’s recommended to avoid the application’s root module and its models module to minimize side-effects of importing code.

In practice, signal handlers are usually defined in a signals submodule of the application they relate to. Signal receivers are connected in the ready() method of your application configuration class. If you’re using the receiver() decorator, import the signals submodule inside ready().