salix/services/client/common/models/address-observation.js

module.exports = function(Self) {
    Self.validatesPresenceOf('observationTypeFk', {
        message: 'Observation type cannot be blank'
    });

    Self.validateAsync('typeUnique', typeIsUnique, {
        message: 'Observation type must be unique'
    });
    async function typeIsUnique(err, done) {
        let filter = {
            fields: ['id'],
            where: {
                observationTypeFk: this.observationTypeFk,
                addressFk: this.addressFk
            }
        };

        if (this.id)
            filter.where.id = {neq: this.id};

        if (await Self.findOne(filter))
            err();
        done();
    }
};