[Solved] Identify the error in this guard code snippet:import { CanActivate, ExecutionContext... Identify the error in this guard code snippet:import { CanActivate, ExecutionContext } from '@nestjs/common'; | NestJS

NestJS - Authentication

Identify the error in this guard code snippet:

import { CanActivate, ExecutionContext } from '@nestjs/common';

export class MyGuard implements CanActivate {
  canActivate(context: ExecutionContext) {
    if (context.switchToHttp().getRequest().user) {
      return true;
    }
  }
}

AIncorrect import of ExecutionContext

BUsing switchToHttp() is not allowed in guards

CcanActivate should be async but is not

DMissing return statement when user is not present

Step-by-Step Solution

Solution:

Step 1: Check canActivate return paths
The method returns true if user exists, but returns nothing (undefined) otherwise.
Step 2: Understand guard return requirements
canActivate must always return a boolean or Promise. Missing return means undefined, which is invalid.
Final Answer:
Missing return statement when user is not present -> Option D
Quick Check:
All paths must return boolean = B [OK]

Quick Trick: Always return true or false in canActivate [OK]

Common Mistakes:

Forgetting else return false
Assuming undefined is false
Thinking async is always required

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More NestJS Quizzes

Identify the error in this guard code snippet:

Step 1: Check canActivate return paths

Step 2: Understand guard return requirements

Final Answer:

Quick Check:

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