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What is Django Custom Signals | Django Tutorials

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What is Django Custom Signals | Django Tutorials

What is Django Custom Signals

As we have learned about Django signals in detail, if you have any confusion you can discuss it with us. Because we want to teach in such a way that you should be cleared concept. So in this article, we will discuss Django Custom signals, it is very important to learn because you will need such signals when you develop a big and professional project. So let’s start to learn more!

Why need Django Custom Signals?

Because our requirements may be different which may not fulfill with built-in signals, so we take advantage of custom signals.  As a signal is an event when occurs, action is performed. YOu should know that you have to create your own signal if your project requirement is not fulfilling with the built signal. It is very easy to create your custom signal according to your project functionality needs. Custome signal helps a developer to make the workflow as a developer wants, it is just beneficial for a big project or small, it depends upon client requirements.

How to Create Custom Django Signals?

Creating Django custom signal is easy to do and it has the same workflow as in built-in signal. The difference is that in a built-in Django signal, you did not need to create any signal, just you have to just use signals in your project like pre_save(), post_save(), etc. But we are learning Django custom signal, which means you have to create your own signal, according to your requirement, that which type of signal you need for your project.

So, you have to create a signals.py file in your application folder as you create for built-in the signal. You should know that all the signals are instances of django.dispatch.Signal.

The beneficial steps for you, if you want to clear your concept:

  • Create signals.py file to write code for creating signals.
  • Create a signal as you want, for example, we have created a custom signal in the following example.
  • Then create a receiving function that will link with a custom signal, when the signal comes, the receiving function will call.
  • You can use this signal in the view section, for that, you have to import this signal in your views section then write a code that will send that signal to receiving function.

Here is a code example, that will be good for you to learn better understanding.

from django.dispatch import Signal, receiver
# You are Creating custom Signals
custom_signal= Signal(providing_args=[“request”, “user”])
# You are creating Receiver Function for custom signal
@receiver(notification)
def show_custom_signal(sender, **kwargs):
    print(sender)
    print(“This is the Custom Signal”)

Now! what you have to do?

As you have understood this article about “Django Custom Signals”, now you must follow instructions as discussed in this article. In case of any issues or problems, don’t worry, you can discuss them with us.

On other hand, If you have any suggestions or knowledge about this article, you can share it with us, we will appreciate you!

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