node-rigorous/src/helpers/validatorIsUnique.js

Rigorous Framework

const rigorousMongoose = require('mongoose');

const RigorousError = require('../facades/RigorousError');
const errorsMessages = require('../etc/errorsMessages');

const helperFormatChecker = require('../helpers/format_checker');

module.exports = (modelName, attribute) => {

    return {
        validator: async (value) => {

            let document = null;
            const condition = { [attribute]: value };

            try {
                document = await rigorousMongoose
                    .model(modelName)
                    .findOne(condition)
                    .select('_id')
                    .exec();

            } catch (error) {
                throw new RigorousError(errorsMessages.OperationError, error);
            }

            if (!helperFormatChecker.isNil(document)) {
                const errorWithAttribute = errorsMessages.ValidatorError.AlreayExist.withAttribute(attribute.toUpperCase());
                throw new RigorousError(errorWithAttribute);
            }
            
            return true;
        },
        message: props => `${props.value} already exist`,
    };
};