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How can you combine global middleware with a guard to protect all routes in NestJS?

hard📝 Application Q9 of 15
NestJS - Middleware
How can you combine global middleware with a guard to protect all routes in NestJS?
AUse middleware to check authentication and guards for logging
BApply global middleware with app.use() and use app.useGlobalGuards() for guards
CGlobal middleware replaces guards, so only middleware is needed
DGuards cannot be global; apply middleware globally instead
Step-by-Step Solution
Solution:

  1. Step 1: Understand middleware and guard roles

    Middleware processes requests; guards handle authorization logic.

  2. Step 2: Apply both globally

    Use app.use() for middleware and app.useGlobalGuards() for guards.

  3. Final Answer:

    Apply global middleware with app.use() and use app.useGlobalGuards() for guards -> Option B

  4. Quick Check:

    Middleware + guards applied globally via app.use() and app.useGlobalGuards() [OK]
Quick Trick: Use app.useGlobalGuards() for global guards [OK]
Common Mistakes:
  • Confusing middleware with guards
  • Thinking middleware replaces guards
  • Believing guards cannot be global

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