You applied ValidationPipe globally with forbidNonWhitelisted: true but no error is thrown for extra properties. What is the likely cause?

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NestJS - Pipes

You applied ValidationPipe globally with forbidNonWhitelisted: true but no error is thrown for extra properties. What is the likely cause?

AGlobal pipes cannot use <code>forbidNonWhitelisted</code>

BValidationPipe does not support <code>forbidNonWhitelisted</code>

CThe DTO class is missing validation decorators

DThe <code>whitelist</code> option was not enabled alongside <code>forbidNonWhitelisted</code>

Step-by-Step Solution

Solution:

Step 1: Understand option dependencies
forbidNonWhitelisted only works if whitelist is enabled to detect extra properties.
Step 2: Identify missing configuration
If whitelist is false or missing, extra properties are not filtered, so no error occurs.
Final Answer:
The whitelist option was not enabled alongside forbidNonWhitelisted -> Option D
Quick Check:
forbidNonWhitelisted requires whitelist: true [OK]

Quick Trick: Enable whitelist with forbidNonWhitelisted to throw errors [OK]

Common Mistakes:

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