Re: Django signals **kwargs

Okkk..

Thanks Vijay..!!!!

Yingi Kem

On 27 Jun 2017, at 9:53 PM, Vijay Khemlani <vkhemlan@gmail.com> wrote:

Same link

https://docs.djangoproject.com/en/1.11/ref/signals/#post-save

post_save¶

django.db.models.signals.post_save¶

Like pre_save, but sent at the end of the save() method.

Arguments sent with this signal:

sender

The model class.

instance

The actual instance being saved.

created

A boolean; True if a new record was created.

raw

A boolean; True if the model is saved exactly as presented (i.e. when loading a fixture). One should not query/modify other records in the database as the database might not be in a consistent state yet.

using

The database alias being used.

update_fields

The set of fields to update as passed to Model.save(), or None if update_fieldswasn't passed to save().

On Tue, Jun 27, 2017 at 4:48 PM, yingi keme <yingikeme@gmail.com> wrote:

Okk.

But what i am actually asking is, what type of contents does the **kwargs. Give me a typical example of **kwargs in the context of signals. The actual data **kwargs may contain.

Yingi Kem

On 27 Jun 2017, at 9:24 PM, Vijay Khemlani <vkhemlan@gmail.com> wrote:

https://docs.djangoproject.com/en/1.11/topics/signals/#receiver-functions

We'll look at senders a bit later, but right now look at the **kwargs argument. All signals send keyword arguments, and may change those keyword arguments at any time. In the case of request_finished, it's documented as sending no arguments, which means we might be tempted to write our signal handling as my_callback(sender).

This would be wrong – in fact, Django will throw an error if you do so. That's because at any point arguments could get added to the signal and your receiver must be able to handle those new arguments.

On Tue, Jun 27, 2017 at 4:14 PM, yingi keme <yingikeme@gmail.com> wrote:

So i want to know, when using a model signals. The reciever function has **kwargs. What is the content of **kwargs in this reciever function below:

@reciever(post_save, sender=MyModel)
def func(sender, instance, **kwargs):
    # some action.

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