#9318: "Virtual" behaviour for signal dispatcher and model inheritance
-------------------------------------+-------------------------------------
Reporter: Alexander Artemenko | Owner: (none)
Type: New feature | Status: new
Component: Core (Other) | Version: 1.0
Severity: Normal | Resolution:
Keywords: model inheritance, | Triage Stage: Accepted
signals, dispatch, proxy, |
subclass |
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Soheil Damangir):
A quick fix without a need to patch could be to override the save method
for the parent mode:
{{{
from django.db import models
class MyModel(models.Model):
"""
>>> m = MyModel(name="The model")
>>> m.save()
Hello!
"""
name = models.CharField(max_length=10)
def save(self, *args, **kwargs):
# To trigger the signals for parent model
klass = self.__class__
try:
if self.__class__._meta.proxy:
self.__class__ = self.__class__._meta.concrete_model
super(MyModel, self).save(*args, **kwargs)
finally:
self.__class__ = klass
class ProxyModel(MyModel):
"""
>>> p = ProxyModel(name="Proxy")
>>> p.save()
Hello!
"""
class Meta:
proxy = True
from django.db.models.signals import post_save
def say_hello(sender, *args, **kwargs):
print "Hello!"
post_save.connect(say_hello, sender=Parent)
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/9318#comment:36>
Django <https://code.djangoproject.com/>
The Web framework for perfectionists with deadlines.
--
You received this message because you are subscribed to the Google Groups
"Django updates" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/django-updates/070.86e657a6a6ec1c219ef2cf20e8fbfbf4%40djangoproject.com.
For more options, visit https://groups.google.com/d/optout.
