Given this code snippet, what will be printed when order_completed.send(sender=None, order_id=123) is called?

medium📝 component behavior Q4 of 15

Django - Signals

Given this code snippet, what will be printed when order_completed.send(sender=None, order_id=123) is called?

from django.dispatch import Signal, receiver

order_completed = Signal(providing_args=["order_id"])

@receiver(order_completed)
def notify(sender, **kwargs):
    print(f"Order {kwargs['order_id']} completed")

AOrder None completed

BOrder 123 completed

CError: missing sender argument

DNo output

Step-by-Step Solution

Solution:

Step 1: Understand signal sending and receiving
The signal is sent with order_id=123, and the receiver prints that value.
Step 2: Check what the receiver prints
The receiver prints "Order 123 completed" using the order_id from kwargs.
Final Answer:
Order 123 completed -> Option B
Quick Check:
Signal send with order_id=123 prints correct message [OK]

Quick Trick: Receiver prints kwargs values sent by signal [OK]

Common Mistakes:

MISTAKES

Assuming sender must not be None
Expecting error due to sender
Thinking no output occurs without return

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More Django Quizzes

Given this code snippet, what will be printed when order_completed.send(sender=None, order_id=123) is called?

Step 1: Understand signal sending and receiving

Step 2: Check what the receiver prints

Final Answer:

Quick Check:

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