How to set default values on DTO nestJs?

Question

import { IsString, IsNumber, IsOptional, IsUUID, Min, Max } from 'class-validator';
import { Transform } from 'class-transformer';

export class QueryCollateralTypeDto {
  @Transform(({ value }) => parseInt(value))
  @IsNumber()
  @IsOptional()
  page: number;

  @Transform(({ value }) => parseInt(value))
  @IsNumber()
  @IsOptional()
  limit: number;

  @IsString()
  @IsOptional()
  select: string;
}

I want to set default integer values for page and limit and string value for select, (example page value of integer 1, limit value of integer 10, and select value of "field1,field2,...")

Answer 1

Okey i found a solution i guess you just initalize the variables at DTO

import { IsString, IsNumber, IsOptional, IsUUID, Min, Max } from 'class-validator';
import { Transform } from 'class-transformer';

export class QueryCollateralTypeDto {
  @Transform(({ value }) => parseInt(value))
  @IsNumber()
  @IsOptional()
  page: number = 1;

  @Transform(({ value }) => parseInt(value))
  @IsNumber()
  @IsOptional()
  limit: number = 10;

  @IsString()
  @IsOptional()
  select: string = 'name,description';
}