How do you pass options to a built-in pipe like ParseIntPipe or ParseUUIDPipe in NestJS?
Instantiate the pipe with an options object using new instead of passing the class reference. This lets you override the error HTTP status code, restrict UUID versions, or configure other pipe-specific behavior. When using new, the pipe is not resolved through DI — it cannot inject services.
Configuring built-in pipes with options
Class reference vs instance — key difference:
Class reference (ParseIntPipe without new) — NestJS resolves it through the DI container.
Instance (new ParseIntPipe({...})) — you control options but lose DI injection inside the pipe.
Use class reference when the pipe has no options and may need injected services.
Use instance when you need to pass specific options like errorHttpStatusCode or version.
ParseFilePipe, ParseArrayPipe, ParseUUIDPipe, and ParseEnumPipe all accept option objects.