如何實現django - pre_save和post_save？

Question

我已經嘗試了很多來實現Django的pre_save和post_save，但仍然無法生成信號。
我擁有的是：

Class Client(models.Model): 
    . 
    . 
    . # some fields 

Class ClientView(models.Model): 
    . 
    . 
    . # some fields 
    class Meta: 
     managed = False 
     db_table = u'clients_view' 
     verbose_name = 'Client' 
     verbose_name_plural = 'Clients' 

    def save(self): 
     models.signals.pre_save.send(sender=obj, instance=self) 
     obj = Client(**self.obj_to_dict()) 
     obj.save() 
     models.signals.post_save.send(sender=obj, instance=self, created=True) 

    def obj_to_dict(self): 
     return {'pk': self.pk, 'name': self.name, 
       'i_company': self.i_company, 'is_reseller': False} 

請告訴我在哪裏，我做錯了？

Answer 1

類似：

Class ClientView(models.Model): 
#...your model definition... 

def your_def(sender, instance, created, **kwargs): 
     if created: 
      client_view = instance 
      #..... 

post_save.connect(your_def, sender=ClientView)