How to apply both ValidationPipe() and ParseIntPipe() to params?

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If you apply the ParseIntPipe to the id param, it will only transform id but not the property id of params, here it will stay a string.

Instead, you can use class-transformer to transform your param to a number:

import { Transform } from 'class-transformer';
export class CreateDataParams {
  @Transform(id => parseInt(id), {toClassOnly: true})
  id: number;
}

Then you use the ValidationPipe with the option transform: true:

@Post(':id')
@UsePipes(new ValidationPipe({transform: true}))
async create(
    @Param() params: CreateDataParams,
    @Body() createDto: CreateDto
) {
    // params.id
}

Note though, that this is unsafe because e.g. parseInt('5abc010') is 5. So you might want to do additional checks in your transformation function.

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