django - 在 django 中创建实例时更新 manytomany 相关字段

Question

我想在MobileCustomer创建实例时更新与 M2M 相关的字段我尝试了信号但它似乎很复杂ManyToManyField，我想active从模型active=True中的active=False字段更新Imei

我尝试了这些方法，但没有一个对我有用，我感谢你的帮助

def mobile_customer(sender,instance,created,*args,**kwargs):
if created:

     for status in instance.imei.all():
         Imei.objects.filter(pk=status.id).update(active=False)

post_save.connect(mobile_customer,sender=SelectMobile)

在我的CreateView课堂views.py中也是如此

Imei.objects.filter(selectmobile__item=self.object).update(active=False)

即使我尝试打印Imei.objects.filter(selectmobile__item=self.object).update(active=False)输出也会是 0 ！

这是我的模型设计

class MobileCustomer(models.Model):
    customer = models.CharField(max_length=30)
    phone = models.CharField(max_length=13)
    mobile = models.ManyToManyField(MobileStorage,through='SelectMobile')

class SelectMobile(models.Model):
    mobile = models.ForeignKey(MobileStorage,on_delete=models.CASCADE)
    item = models.ForeignKey(MobileCustomer,on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField(default=1)
    imei = models.ManyToManyField(Imei)

class MobileStorage(models.Model):
    mobile = models.ForeignKey(Mobile,on_delete=models.CASCADE)
    quantity = models.PositiveIntegerField()

class Mobile(models.Model):
    mobile_name = models.CharField(max_length=40,unique=True)

class Imei(models.Model):
    imei = models.CharField(max_length=15,verbose_name='IMEI',unique=True)
    mobile = models.ForeignKey(MobileStorage,on_delete=models.CASCADE)
    active = models.BooleanField(default=True)

感谢您的帮助..谢谢

标签： djangodjango-signalsmanytomanyfield