can-validate-validatejs

Create validator functions using validate.js.

`makeValidator(constraints)`

Returns a validator function that can be used to validate a single value.

var validateAge = makeValidator({
    numericality: true
});

Parameters

constraints {Object}:
An object of definitions used by the Validate.js library to run validations on a value.

Returns

{Validator}:

A validator type function that takes a value and validates it against the provided constraints.

Usage

A validator can be created either for a single value or for many values. More information on how to configure Validate.JS constraints can be found here.

Single value validation

Using the Validate.js library validators and configuration, call makeValidator and pass the desired constraints. The resulting function can then be used to validate specific values.

var makeValidator = require('can-validate-validatejs');
var validateAge = makeValidator({
    numericality: true
});

var age = 'hello';
validateAge(age); //> ['is not a number']

var anotherAge = 35;
validateAge(anotherAge); //> undefined

Multiple value validation

Using the many works similar to makeValidator, except that makeValidator.many produces a validator that expects an object of values. The validator will run constraints on respective values based on the keys provided.

var makeValidator = require('can-validate-validatejs');
var validatePerson = makeValidator.many({
    age: {
        numericality: true
    },
    name: {
        presence: true
    }
});

var invalidPerson = {
    name: '',
    age: 'hello'
};
validatePerson(invalidPerson); //> {name: ['is required'], age: ['is not a number']}

var validPerson = {
    name: 'Juan',
    age: 35
};
validatePerson(validPerson); //> undefined