How can you combine multiple custom decorators that set different metadata keys and retrieve all metadata in a guard?

hard📝 Application Q9 of 15

NestJS - Guards

AUse <code>reflector.get</code> once with an array of keys

BCall <code>reflector.getAllAndOverride</code> for each key to get the closest metadata

CSet all metadata under one key and retrieve with <code>reflector.get</code>

DUse <code>Reflect.getMetadataKeys</code> to get all keys and then <code>reflector.get</code> for each

Step-by-Step Solution

Solution:

Step 1: Understand reflector.getAllAndOverride
This method retrieves metadata for a key from the closest source (method or class), useful for multiple keys.
Step 2: Evaluate other options
Reflector.get does not accept multiple keys at once, and Reflect.getMetadataKeys is not part of Reflector class.
Final Answer:
Call reflector.getAllAndOverride for each key to get the closest metadata -> Option B
Quick Check:
Use getAllAndOverride per key = A [OK]

Quick Trick: Use getAllAndOverride to get metadata from method or class [OK]

Common Mistakes:

Master "Guards" in NestJS

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More NestJS Quizzes