Custom validators using schema

[aaleksandrov]

Hi,
is it possible to create a custom validator and use it with validation schema? I don't want to use decorators because I don't control model (it comes from some sdk).
Please consider the following TS example. How should customValidationSchema look to make the custom validator work?

import {ValidatorConstraint, ValidatorConstraintInterface, ValidationArguments, ValidationSchema, registerSchema, validate} from 'class-validator';

@ValidatorConstraint({ name: 'customText', async: false })
export class CustomTextLength implements ValidatorConstraintInterface {

    validate(text: string, _args: ValidationArguments) {
        return text.length > 1 && text.length < 5;
    }

    defaultMessage(_args: ValidationArguments) {
        return 'Text ($value) is too short or too long!';
    }
}

class Model {
    name: string;
}

const instance = new Model();
instance.name = 'too-long-name-';

// This schema doesn't work
const customValidationSchema: ValidationSchema = {
    name: 'myCustomSchema',
    properties: {
        name: [{
            type: 'customValidation',
            constraints: [CustomTextLength]
        }],
    }
};

registerSchema(customValidationSchema);

validate('myCustomSchema', instance).then(errors => {
    if (errors.length > 0) {
        console.log('Validation failed: ', errors);
    } else {
        console.log('Validation succeed.');
    }
});

[vlapo]

I dont think so class-validator support custtom validators. Also this feature is listed in 1.0 roadmap #178.

Close as duplicate of #186

[NoNameProvided]

Schema validation is deprecated in the library. Closing this as wontfix.

[github-actions]

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