Object Validator

Object Validator help you to build validating function to validate a JSON Object easily. based on node-validator

Installation

Install with npm:

npm install obj-validator --save

Example

var Checker = require('obj-validator').Checker,
    validate;

validate = Checker({
    'id': Checker.isInt(),
    'username': Checker.isUppercase()
});

// string message for check
validate = Checker({
    'id': Checker.msg('Id is not int').isInt()
});

// given message
validate = Checker({
    'foo': Checker.msg({
        isNumeric: 'This is not a number',
        contains: "The value doesn't have a 0 in it"
    }).isNumeric().contains('0')
});

// nested checker, with nested Checker
validate = Checker({
    'id': Checker.msg('Id is not int').isInt(),
    'profile': Checker({
        'name': Checker.isAlpha(),
        'email': Checker.len(6, 60).isEmail(),
    }).error(function() { throw new Error('Invalid profile'); })
});


// nested checker, with nested objects
validate = Checker({
    'id': Checker.msg('Id is not int').isInt(),
    'profile': {
        'name': Checker.isAlpha(),
        'email': Checker.len(6, 60).isEmail(),
    }
});

// custom error handler
validate = Checker({
    'id': Checker.isInt().error(function(msg) { console.log(msg); }), // the same as validator
    'profile': Checker({
        ...
    }).onerror(function(/* message */ msg, /* property name */ key, /* original error */original) { throw new Error('Invalid profile'); })
}).onerror(function(msg, key, err) {...});


try {
    validate(candidate)
}catch(e) {
    console.log(e.message);
}

Validation methods

The validation methods is the same as node-validator.

Additional methods

• isOptional(ignoreFalseValue): which mark this property checking is optional and no needed if the property is not existing in candidate
• error(fn): add error handler

Changelog

• 0.0.6: 'isOptional' method now accepts argument ignoreFalseValue, which indicates whether the checker accept false values like 0, "", null, etc.
• 0.0.5: add 'isOptional' and make nested object checker better; allow custom error handlers
• 0.0.4: expose check api in 'validator' for convinient
• 0.0.3: make internal Rule callable
• 0.0.2: nothing valuable
• 0.0.1: start

License

(The BSD License)

Copyright (c) 2013, Villa.Gao [email protected]; All rights reserved.