[Solved] What is wrong with this code that tries to use pre_delete signal? from django.db.models.... What is wrong with this code that tries to use pre_delete signal? | Django

Django - Signals

What is wrong with this code that tries to use pre_delete signal?

from django.db.models.signals import pre_delete

@pre_delete(sender=Author)
def cleanup(sender, instance, **kwargs):
    print('Cleaning up author data')

AUsing @pre_delete decorator is incorrect; should use @receiver instead.

BMissing import for Author model.

CSignal handler must return a value.

DThe function name 'cleanup' is reserved and cannot be used.

Step-by-Step Solution

Solution:

Step 1: Check signal handler decoration
Django signals use the @receiver(signal, sender=Model) decorator, not @pre_delete(sender=Model).
Step 2: Confirm correct decorator usage
Replace @pre_delete(sender=Author) with @receiver(pre_delete, sender=Author) to fix the error.
Final Answer:
Using @pre_delete decorator is incorrect; should use @receiver instead. -> Option A
Quick Check:
Use @receiver for signals, not @pre_delete [OK]

Quick Trick: Use @receiver(signal, sender=Model) to decorate signal handlers [OK]

Common Mistakes:

MISTAKES

Using signal name as decorator directly
Forgetting to import @receiver
Assuming signal handlers must return values

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What is wrong with this code that tries to use pre_delete signal?

Step 1: Check signal handler decoration

Step 2: Confirm correct decorator usage

Final Answer:

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