model-validate

ModelValidate

MVC validation for JavaScript

SyncValidator

src/index.js:20-71

Class for synchronous validation.

Parameters

• validators (optional, default {})

validate

src/index.js:39-70

Validate a model according to the validators set up in mask

Parameters

• model Object Data to be validated Ex: { phone : "123-456-7890" }

• mask Object Validators to be applied to model. Ex: { phone : ['required', 'phone']}

  The following validators are provided by default

  • required checks for non-null, non-whitespace, non-empty strings or Numbers
  • phone validates 10 or 11 digit phone numbers reguardless of formatting characters
  • credit-card validates credit card numbers according to a LUHN-10 check
  • zip-code validates American 5-digit and 9-digit zip codes

Example

import {SyncValidator} from 'model-validate';

// Get a validator with just the built-in validators
let validator = new SyncValidator();

// sample data including some errors
let model = {
  address : {
    firstName : 'John',
    address1  : '123 SomeRoad',
    address2  : 'apt 4',
    city      : 'New York',
    state     : '    ',
    zip       : '123456',
  },
  phone : '1-(123)-123-1234',

}

// get validation results
let results = validatator.validate(model, {
  // the mask object mirrors the structure of the model
  address : {
    firstName : ['required'],
    lastName  : ['required'],
    address1  : ['required'],
    city      : ['required'],
    state     : ['required'],
    zip       : ['required', 'zip-code'],
  },
  phone : ['required', 'phone'],
})

// This returns the following structure
{
  "address": {
    "firstName": {
      "required": {
        "_valid": true
      },
      "_valid": true
    },
    "lastName": {
      "required": {
        "_valid": false,
        "reason": "\'lastName\' is null or undefined"
      },
      "_valid": false
    },
    "address1": {
      "required": {
        "_valid": true
      },
      "_valid": true
    },
    "city": {
      "required": {
        "_valid": true
      },
      "_valid": true
    },
    "state": {
      "required": {
        "value": false,
        "reason": "String is empty"
      },
      "_valid": false
    },
    "zip": {
      "required": {
        "_valid": true
      },
      "zip-code": {
        "_valid": false,
        "reason": "Zip must be 5 digits or have the full extended syntax"
      },
      "_valid": false
    },
    "_valid": false
  },
  "phone": {
    "required": {
      "_valid": true
    },
    "phone": {
      "_valid": true
    },
    "_valid": true
  },
  "_valid": false
}

There is a _valid property at every level that describes the validity of everything at that level and lower. This way you can decide to use the data or not simply based on results._valid, but you can show feedback to the user based on the valididy of a specific validation.

For example model.address.zip passes the required validator, but not the zip-code validator because it has 6 digits instead of 5. So results.address.zip.required._valid == true, but results.address.zip.zip-code._valid == false