[Solved] Consider this code snippet:from django.db.models.signals import pre_delete from django.dispatch import receiver @receiver(pre_delete, sender=Article) def cleanup(sender, instance, **kwargs):... | Django

Django - Signals

Consider this code snippet:

from django.db.models.signals import pre_delete
from django.dispatch import receiver

@receiver(pre_delete, sender=Article)
def cleanup(sender, instance, **kwargs):
    print(f"Cleaning up {instance.title}")

What will happen when an Article instance is deleted?

ANo message will print because pre_delete is incorrect

BThe message will print after deletion

CThe message 'Cleaning up [title]' will print before deletion

DAn error will occur because signals can't print

Step-by-Step Solution

Solution:

Step 1: Understand pre_delete signal timing
The pre_delete signal fires before the model instance is deleted from the database.
Step 2: Analyze the handler behavior
The handler prints a message using the instance's title before deletion.
Final Answer:
The message 'Cleaning up [title]' will print before deletion -> Option C
Quick Check:
pre_delete runs before delete = A [OK]

Quick Trick: pre_delete runs before deletion, post_delete after [OK]

Common Mistakes:

MISTAKES

Confusing pre_delete with post_delete
Thinking signals can't perform print or logging
Assuming no output from signals

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More Django Quizzes

Consider this code snippet:

Step 1: Understand pre_delete signal timing

Step 2: Analyze the handler behavior

Final Answer:

Quick Check:

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