fix: Unable to resolve signature of property decorator when called as an expression - typescript

[kacluk123]

I can't use class-validator because of typescript bug

import { isNotEmpty } from 'class-validator'

export class GetTokenDto {
  @isNotEmpty() code: string;
}

and the compile error is:

error TS1240: Unable to resolve signature of property decorator when called as an expression.
This expression is not callable.
Type 'Boolean' has no call signatures.

4 @isnotempty() code: string;

[NoNameProvided]

Hi @kacluk123!

You have a typo in your example isNotEmpty => IsNotEmpty. With this fix applied I cannot reproduce your issue. Working example:

import 'reflect-metadata';
import { IsNotEmpty, validateSync} from 'class-validator';

export class GetTokenDto {
  @IsNotEmpty() code: string;
}

const instance = new  GetTokenDto();

const errors = validateSync(instance)
// proper error is thrown here

console.log(errors);

[github-actions]

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