[Solved] In NestJS, what is the primary function of a guard that checks user roles? — Ans: To restrict access to routes based on user roles | NestJS

NestJS - Guards

In NestJS, what is the primary function of a guard that checks user roles?

ATo validate the format of incoming request data

BTo restrict access to routes based on user roles

CTo log user activity for auditing purposes

DTo handle exceptions thrown in controllers

Step-by-Step Solution

Solution:

Step 1: Understand Guards
Guards in NestJS are used to determine whether a request should be handled by the route handler or not.
Step 2: Role-based Guard Purpose
A role-based guard specifically checks the user's roles to allow or deny access to certain routes.
Final Answer:
To restrict access to routes based on user roles -> Option B
Quick Check:
Guards control access based on roles [OK]

Quick Trick: Guards restrict access by roles, not data validation [OK]

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In NestJS, what is the primary function of a guard that checks user roles?