Django信号m2m_changed未触发 [英] Django signal m2m_changed not triggered

问题描述

我最近开始在Django项目中使用信号（1.3），它们都可以正常工作，除了
我不知道为什么m2m_changed信号在我的模型上永远不会被触发。通过在django管理表单上添加/删除PageChild内联实例来编辑Section实例。

我尝试以文档中所述的方式注册回调函数，但没有得到任何结果。

来自django.db.models的django.db导入模型
的摘录自我的models.py

 信号导入m2m_changed 
 
 
类节（models.Model）：
 name = models.CharField（unique = True，max_length = 100）
 pages = models.ManyToManyField （page，through ='PageChild'）
 
 class PageChild（models.Model）：
 section = models.ForeignKey（section）
 page = models.ForeignKey（Page，limit_choices_to = Q（is_template = False，is_background = False））
 
 
 @receiver（m2m_changed，sender = Section.pages.through）
 def m2m（sender，** kwargs） ：
 printm2m changed！ 
 
 m2m_changed.connect（m2m，sender = Section.pages.through，dispatch_uid ='foo'，weak = False）
  

我缺少一些明显的东西？

解决方案

这是一个开放的错误： https://code.djangoproject.com/ticket/16073

本周浪费了几个小时。

I recently started to use signals in my Django project (v. 1.3) and they all work fine except that I just can't figure out why the m2m_changed signal never gets triggered on my model. The Section instance is edited by adding/deleting PageChild inline instances on an django admin form.

I tried to register the callback function either way as described in the documentation, but don't get any result.

Excerpt from my models.py

from django.db import models
from django.db.models.signals import m2m_changed


class Section(models.Model):
    name = models.CharField(unique = True, max_length = 100)
    pages = models.ManyToManyField(Page, through = 'PageChild')

class PageChild(models.Model):
    section = models.ForeignKey(Section)
    page = models.ForeignKey(Page, limit_choices_to = Q(is_template = False, is_background = False))


@receiver(m2m_changed, sender = Section.pages.through)
def m2m(sender, **kwargs):
    print "m2m changed!"

m2m_changed.connect(m2m, sender = Section.pages.through, dispatch_uid = 'foo', weak = False)

Am I missing something obvious?

解决方案

This is an open bug: https://code.djangoproject.com/ticket/16073

I wasted hours on it this week.

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