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I am working on a notification app in Django 1.6 and I want to pass additional arguments to Django signals such as post_save. I tried to use partial from functools but no luck.
from functools import partial post_save.connect( receiver=partial(notify, fragment_name="categories_index"), sender=nt.get_model(), dispatch_uid=nt.sender ) notify function has a keyword argument fragment_name which I want to pass as default in my signals.
Any suggestions?
763
pre_save. This is sent at the beginning of a model's save() method. Arguments sent with this signal: sender.
In the example above, save_profile is our receiver function, User is the sender and post_save is the signal. You can read it as: Everytime when a User instance finalize the execution of its save method, the save_profile function will be executed. If you supress the sender argument like this: post_save.
There are 3 types of signal. pre_save/post_save: This signal works before/after the method save(). pre_delete/post_delete: This signal works before after delete a model's instance (method delete()) this signal is thrown.
Django Signals - post_delete()To notify another part of the application after the delete event of an object happens, you can use the post_delete signal.
You can define additional arguments in custom save method of model like this:
class MyModel(models.Model): .... def save(self, *args, **kwargs): super(MyModel, self).save(*args, **kwargs) self.my_extra_param = 'hello world' And access this additional argument through instance in post_save signal receiver:
@receiver(post_save, sender=MyModel) def process_my_param(sender, instance, *args, **kwargs): my_extra_param = instance.my_extra_param If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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