[Solved] Given this guard code snippet:canActivate(context: ExecutionContext) { const request = context.switchToHttp().... }What will happen if a user without isAdmin tries to access the guarded route? | NestJS

NestJS - Guards

Given this guard code snippet:

canActivate(context: ExecutionContext) {
  const request = context.switchToHttp().getRequest();
  return request.user && request.user.isAdmin;
}

What will happen if a user without isAdmin tries to access the guarded route?

AAccess will be granted because the guard always returns true

BThe guard will ignore the user and allow access

CAn error will be thrown due to missing <code>isAdmin</code> property

DAccess will be denied because <code>isAdmin</code> is false or missing

Step-by-Step Solution

Solution:

Step 1: Analyze the guard condition
The guard returns true only if request.user exists and request.user.isAdmin is truthy.
Step 2: Consider user without isAdmin
If isAdmin is false or missing, the condition returns false, denying access.
Final Answer:
Access will be denied because isAdmin is false or missing -> Option D
Quick Check:
Guard returns false if not admin = B [OK]

Quick Trick: Guard returns true only if user is admin [OK]

Common Mistakes:

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