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我有一个名为receipt_printer 的Django 应用程序，它应该在使用信号接收到订单时打印订单。这里有两个应用程序：Orders和receipt_printer。

但是，无论何时处理订单并充满电，我都无法使信号正常工作。为简单起见，下面的示例只是将一些内容打印到控制台。如果我在 Orders 应用程序的 models.py 中执行所有操作，它就可以正常工作。

收据打印机/apps.py

from django.apps import AppConfig

class ReceiptPrinterConfig(AppConfig):
    name = 'receipt_printer'

    def ready(self):
        from . import signals

收据打印机/signals.py

from django.db import models
from saleor.order.models import Order
from django.db.models.signals import post_save

def order_fully_paid_signal(sender, instance, created, **kwargs):
    if instance.get_payment_status() == "fully-charged":
        print("This signal is working for fully paid order")
    else:
        print("This signal won't working for fully paid order")
post_save.connect(order_fully_paid_signal, sender=Order)

收据打印机/初始化.py

default_app_config = 'receipt_printer.apps.ReceiptPrinterConfig'

更新，也尝试了以下 - 没用：

@receiver(post_save, sender=Order)
def order_fully_paid_signal(sender, instance, created, **kwargs):
    if instance.get_payment_status() == "fully-charged":
        print("This signal is working for fully paid order")
    else:
        print("This signal won't working for fully paid order")
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2 回答 2

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我需要将以下行添加到 Orders 应用程序的 models.py 的底部：

from saleor.saleor_package.receipt_printer.signals import order_fully_paid_signal
于 2020-11-11T20:05:35.480 回答
0

不完全确定这里的问题是什么，但下面是我使用的 post_save 模式，它可以跨应用工作，无需对 apps.py 或 init.py 进行任何更改：

from django.db.models.signals import post_save
from django.dispatch import receiver

@receiver(post_save, sender=<Model>, dispatch_uid='<model>_post_save')
def <model>_post_save(sender, instance, **kwargs):

    ...
于 2020-11-11T19:46:02.140 回答