[Solved] You want to apply three middleware in NestJS to ... authMiddleware requires validation to be done first.auditMiddleware should log after both run.Which is the correct order to apply these middleware? | NestJS

NestJS - Middleware

You want to apply three middleware in NestJS to the route /api/items: validateMiddleware, authMiddleware, and auditMiddleware.

Which is the correct order to apply these middleware?

Aapply(authMiddleware, validateMiddleware, auditMiddleware).forRoutes('/api/items')

Bapply(validateMiddleware, authMiddleware, auditMiddleware).forRoutes('/api/items')

Capply(auditMiddleware, validateMiddleware, authMiddleware).forRoutes('/api/items')

Dapply(authMiddleware, auditMiddleware, validateMiddleware).forRoutes('/api/items')

Step-by-Step Solution

Solution:

Step 1: Identify dependency order
authMiddleware depends on validateMiddleware, so validation must run first.
Step 2: Place auditMiddleware last
Since auditMiddleware logs after both, it should be last.
Final Answer:
apply(validateMiddleware, authMiddleware, auditMiddleware).forRoutes('/api/items') -> Option B
Quick Check:
Middleware order matches dependencies and logging sequence [OK]

Quick Trick: Order middleware by dependency and desired execution sequence [OK]

Common Mistakes:

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You want to apply three middleware in NestJS to the route /api/items: validateMiddleware, authMiddleware, and auditMiddleware.