Passing context with custom validator

[adamalfredsson]

I'm trying to pass a context object on my custom validator but I can't access it from the ValidationError object. Am I missing something?

class IsLongerThanValidator implements ValidatorConstraintInterface {
    validate(value: any, args: ValidationArguments) {
        const [relatedPropertyName] = args.constraints;
        const relatedValue = (args.object as any)[relatedPropertyName];
        return  typeof value === "string" &&
            typeof relatedValue === "string" &&
            value.length > relatedValue.length; // you can return a Promise<boolean> here as well, if you want to make async validation
    }
}

export function IsLongerThan(property: string, validationOptions?: ValidationOptions) {
   return function (object: Object, propertyName: string) {
        registerDecorator({
            name: "isLongerThan",
            target: object.constructor,
            propertyName: propertyName,
            constraints: [property],
            options: validationOptions,
            validator: IsLongerThanValidator
        });
   };
}

class MyForm {
    title = 'Default title';

    @IsLongerThan('title', {
        context: {
            i18n: 'validations.isLongerThan',
            value: 'title',
        },
    })
    subtitle?: string;
}

const [error] = await validate(myForm)
console.log(error.property) // subtitle
console.log(error.contexts) // undefined

[alex-adamant]

Yes, passing context doesn't work for custom validations and for IsDefined decorator either. mapContext function in ValidationExecutor runs only once for default metadatas and not for definedMetadatas or customValidationMetadatas. I guess fix should be rather simple.

[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.