object.validate

No-frills node module to perform validations. There are no fancy regex and match properties. The schema is kept purposefully minimal to only a few properties. Anything fancier can be done by a custom validator function.

• Define a short-hand property with a simple string value representing the type: property: <type>.
• Define a short-hand property with a simple validation function: property: <function>.
• Define an object literal that accepts required, type, or validator function.

Installation

npm install --save object.validate

Usage

const JsonSchema = require('object.validate')
 
const definition = new JsonSchema({
  // Define a custom validator to validate type and value.
  id: (value, is) => is.number(value) && id > 0,
  // Define a simple type string. Property is not required by default.
  message: 'string',
  // Define an object literal with bells and whistles.
  date: {
    required: true,
    type: 'date',
    validator: value => value <= new Date()
  },
  data: {
    text: 'string'
  }
})
 
const valid = {
  id: 123,
  message: 'test',
  date: new Date(),
  data: {
    text: 'test'
  }
}
 
// Validate the entire object.
const good = definition.validate(valid)
 
// Validate individual properties.
definition.schema.id.validate(valid)
definition.schema.message.validate(valid)
definition.schema.date.validate(valid)
definition.schema.data.text.validate(valid.data)

Validation Rules

Order	Rules	Result
1	If required is true and the value is null or undefined	false
2	If required is false and the value is null or undefined	true
3	If type is not validator and the is-type check fails	false
4	If validator is a function	validator result
5	If validator result is a RegExp object	test result
6	Default	true

Simple Type

You can pass a type string defined by the simple is library rather than passing an object literal.

const schema = new JsonSchema({
  name: 'string',
  age: 'number',
  birth: 'date'
})

Simple Validator

Custom validators take the form of: (value, is), where is is the is node library. You can pass a validator function inline when assigning the schema or use the validator property in an object literal.

NOTE: When used inline, you must check the type yourself.

// Inline property validator.
property: (value, is) => is.string(value) && value.length > 0
 
// Object literal property.
property: {
  type: 'string',
  validator: value => value.length > 0
}

License

Copyright 2017 NativeCode Development [e-mail]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.