[Solved] Which of the following is the correct way to apply an authentication guard in a NestJS controller? — Ans: @UseGuards(AuthGuard('jwt')) export class MyController {} | NestJS

NestJS - Authentication

Which of the following is the correct way to apply an authentication guard in a NestJS controller?

A@AuthGuard('jwt') export class MyController {}

B@UseGuards(AuthGuard('jwt')) export class MyController {}

C@UseAuthGuard('jwt') export class MyController {}

D@GuardUse(Auth('jwt')) export class MyController {}

Step-by-Step Solution

Solution:

Step 1: Recall NestJS guard syntax
Guards are applied using the @UseGuards() decorator with the guard class or strategy inside.
Step 2: Match the correct syntax for JWT guard
The correct syntax is @UseGuards(AuthGuard('jwt')) to apply the JWT strategy.
Final Answer:
@UseGuards(AuthGuard('jwt')) export class MyController {} -> Option B
Quick Check:
@UseGuards(AuthGuard('jwt')) = Correct syntax [OK]

Quick Trick: Use @UseGuards with AuthGuard('jwt') for authentication [OK]

Common Mistakes:

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Which of the following is the correct way to apply an authentication guard in a NestJS controller?