Nest: parse params and

[jaufgang]

is there a way to specify that Params and Query be injected as a number instead of a string?

@Get("validate/:code?")
codes(@Param("code") code : number) {
    return ValidationService.validate(number); // error: currently gets passed as a string
}

I know I can use parseInt(code) but i am wondering if there is a more elegant way of specifying to the injector to return the param as a number.

[cojack]

@jaufgang I guess the only way here is a Interceptor

[jaufgang]

It would be nice if this could be added as a feature... maybe add an optional ParamType argument to the Param decorator.

@Get("validate/:code?")
codes(@Param("code", ParamType.number) code : number) {
    return ValidationService.validate(number); 
}

This could work the same way for the Query,Body decorators

[cojack]

@jaufgang then check this http://docs.nestjs.com/pipes it should cover your case

[kamilmysliwiec]

Hello @jaufgang,
That's why we have param-scoped pipes.
Usage example https://github.com/nestjs/nest/blob/master/examples/01-cats-app/src/modules/cats/cats.controller.ts
Pipe https://github.com/nestjs/nest/blob/master/examples/01-cats-app/src/modules/common/pipes/parse-int.pipe.ts

[jaufgang]

Ok great. Thank you.

[connorlanigan]

Since the directory structure of the repository has changed, these are the new links:

_Usage example_
https://github.com/nestjs/nest/blob/master/sample/01-cats-app/src/cats/cats.controller.ts
_Pipe (which is already integrated into Nest.js)_
https://github.com/nestjs/nest/blob/master/sample/01-cats-app/src/common/pipes/parse-int.pipe.ts

[lock[bot]]

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