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62

How to parse dates in JSON request with NestJs @Body

rated 0 times [ 63] [ 1] / answers: 1 / hits: 20295 / 4 Years ago, sat, february 15, 2020, 12:00:00

I have a DTO that looks like this:

class PersonDto {

   readonly name: string;

   readonly birthDate: Date;

}

My NestJs controller method looks like this:

@Post

create(@Body() person: PersonDto) {

    console.log(New person with the following data:, person);

    // more logic here

}

The JSON data that gets posted has birthDate as a string: 2020-01-15. How can I convert this string to a JavaScript Date object? I'd like to add the @IsDate class-validation to PersonDto but currently that would fail.

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braeden

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3 Years ago

answered 4 Years ago kieraelsies · Accepted Answer

I figured out how to use the global ValidationPipe with a Date property and the @IsDate() annotation:

The first step is to allow transformations like this (my bootstrap file as an example):

async function bootstrap() {

  const app = await NestFactory.create(AppModule);

  app.useGlobalPipes(new ValidationPipe({transform: true}));

  await app.listen(3000);

}

bootstrap();

Then you need to annotate the DTO with the @Type() annotation:

import { IsDate } from 'class-validator';

import { Type } from 'class-transformer';



class PersonDto {

   readonly name: string;

   @Type(() => Date)

   @IsDate()

   readonly birthDate: Date;

}