Pipeline Internals

Preview — 3 of 10 questions

Internally, which NestJS construct assembles guards, interceptors, pipes, and the handler into a single callable per route at bootstrap?

AThe RouterExecutionContext (route handler factory) built by the core's execution context creators

BThe RouterModule

CThe Reflector

DThe HttpAdapterHost

A guard must read metadata that could be on the class or the method, preferring the method. Which call expresses this precisely?

Areflector.get(KEY, context.getClass())

Breflector.getAllAndOverride(KEY, [context.getHandler(), context.getClass()])

CReflect.getMetadata(KEY, context.getArgs())

Dreflector.getAllAndMerge(KEY, [context.getClass(), context.getHandler()])

A single interceptor serves HTTP, WebSocket, and gRPC. What is the type of context.getType() and how should you safely extend it?

A'http' | 'ws' | 'rpc' by default, extendable via a generic like getType<GqlContextType>()

BAlways string; no generic support

Cnumber representing a transport enum

D'rest' | 'graphql' only

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