custom-class-validator-tools

String type decorator

Decorator	Type	Description
@IsNullableString	string	null
@IsUndefinableString	string	undefined
@IsOptionalString	string	null
@IsNotEmptyNumberString	string	Checks a string is a number
@IsNotEmptyBooleanString	string	Checks a string is a boolean
@IsNullableNumberString	string	null
@IsNullableBooleanString	string	null
@IsUndefinableNumberString	string	undefined
@IsUndefinableBooleanString	string	undefined
@IsOptionalNumberString	string	null
@IsOptionalBooleanString	string	null

Number type decorator

Decorator	Type
@IsNotEmptyNumber	number
@IsNullableNumber	nubmer
@IsUndefinableNumber	number
@IsOptionalNumber	number

Boolean type decorator

Decorator	Type
@IsNotEmptyBoolean	boolean
@IsNullableBoolean	boolean
@IsUndefinalbeBoolean	boolean
@IsOptionalBoolean	boolean

ValidateNested usage case

import { isNotEmptyString, IsNotEmptyBoolean, isNullable, IsUndefinable } from 'custom-class-validator-tools';
import { IsInstance, ArrayNotEmpty, ValidateNested } from 'class-validator';
import { Type } from 'class-transformer';

class Tag {
  @IsNotEmptyString()
  tag1: string;
  @IsNotEmptyString()
  tag2: string;
}

class Result {
  @IsNotEmptyBoolean()
  failed: boolean;
}

class Post {
  @IsNullable()
  @ArrayNotEmpty()
  @IsInstance(Tag, { each: true })
  @ValidateNested({ each: true })
  @Type(() => Tag)
  tags: Tag[] | null;

  @IsUndefinable()
  @IsInstance(Result)
  @ValidateNested()
  @Type(() => Result)
  result?: Result;
}