ValidationError class is missing required "constraints" property.

[dylansmurray]

Given the following:

import { IsArray, ValidateNested, IsString, IsDefined, validate } from 'class-validator';

class Alpha {
  @IsArray()
  @ValidateNested({ each: true })
  public foo: Array<Beta>;
}

class Beta {
  @IsString()
  @IsDefined()
  public bar : string;
}

const alphaInstance = new Alpha();

const betaInstance1 = new Beta();
betaInstance1.bar = 'valid string';

const betaInstance2 = new Beta();

alphaInstance.foo = [betaInstance1, betaInstance2];

validate(alphaInstance).then((errors) => {
  console.log('Full error:', errors[0])
  console.log('Constraints value:', errors[0].constraints)
});

console log result:

Full error: ValidationError {
  target: Alpha { foo: [ [Object], Beta {} ] },
  value: [ Beta { bar: 'valid string' }, Beta {} ],
  property: 'foo',
  children:
   [ ValidationError {
       target: [Array],
       value: Beta {},
       property: '1',
       children: [Array] } ] }

Constraints value: undefined

constraints is defined as a required property -- something like Object.keys(constraints).forEach therefore can lead to an unexpected runtime exception.

[mbfisher]

+1 for this - just had the same issue!

[vlapo]

This works as intended. I think we should mark constraints as optional such a higher level of ValidationError may not contains constraints.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.