Signal dispatch process in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Django signal dispatcher.

Django

from django.dispatch import [1]

Drag options to blanks, or click blank then click option'

Areceiver

Bsend

CSignal

Dconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'receiver' instead of 'Signal'.

Trying to import 'send' which is a method, not a class.

The Signal class is imported from django.dispatch to create custom signals.

2fill in blank

medium

Complete the code to connect a receiver function to a signal.

Django

my_signal.[1](receiver=my_receiver)

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Aregister

Bconnect

Cdispatch

Dsend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'send' which triggers the signal instead of connecting.

Using 'register' which is not a Django signal method.

The connect method links a receiver function to a signal so it gets called when the signal is sent.

3fill in blank

hard

Fix the error in sending a signal with a sender argument.

Django

my_signal.send(sender=[1])

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ANone

Brequest

Cself

DMyModel

Attempts:

3 left

💡 Hint

Common Mistakes

Passing 'self' which is an instance, not a class.

Passing 'None' which is allowed but not typical for sender.

The sender argument should be the class or object that sends the signal, often a model class like MyModel.

4fill in blank

hard

Fill both blanks to define and send a custom signal with a named argument.

Django

my_signal = Signal(providing_args=[[1]])
my_signal.send(sender=MyModel, [2]=42)

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A'value'

Bvalue

C'count'

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes when sending the argument name.

Not matching the argument name in providing_args and send.

The signal is defined to provide an argument named 'count' (string in list). When sending, the argument is passed as a keyword without quotes.

5fill in blank

hard

Fill all three blanks to create a receiver function and connect it to a signal.

Django

@receiver([1], sender=[2])
def my_receiver(sender, **kwargs):
    print([3])

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Amy_signal

BMyModel

Ckwargs.get('count')

Dsender

Attempts:

3 left

💡 Hint

Common Mistakes

Using the sender instance instead of class.

Printing sender instead of the custom argument.

Not using the @receiver decorator properly.

The @receiver decorator connects my_receiver to my_signal with sender MyModel. Inside, it prints the 'count' argument from kwargs.