parameter

parameter

A parameter verify tools.

Install

$ npm install parameter --save

Usage

API

• validate(rule, value) - validate the value conforms to rule. return an array of errors if break rule.
• validate.addRule(type, check) - add custom rules.
  • type - rule type, required and must be string type.
  • check - check handler. can be a function or a RegExp.

Example

var validate = require('parameter');

var data = {
  name: 'foo',
  age: 24,
  gender: 'male'
};

var rule = {
  name: 'string',
  age: 'int',
  gender: ['male', 'female', 'unknown']
};

var errors = validate(data, rule);

complex example

Rule

common rule

• required - if required is set to false, this property can be empty. default to true.
• type - The type of property, every type has it's own rule for the validate.

int

If type is int, there has tow addition rules:

• max - The maximum of the value, value must <= max.
• min - The minimum of the value, value must >= min.

integer

Alias to int.

number

If type is number, there has tow addition rules:

• max - The maximum of the value, value must <= max.
• min - The minimum of the value, value must >= min.

date

The date type want to match YYYY-MM-DD type date string.

dateTime

The dateTime type want to match YYYY-MM-DD HH:mm:ss type date string.

datetime

Alias to dateTime.

id

The id type want to match /^\d+$/ type date string.

boolean

Match boolean type value.

bool

Alias to boolean

string

If type is string, there has four addition rules:

• allowEmpty(alias to empty) - allow empty string, default to false.
• format - A RegExp to check string's format.
• max - The maximum length of the string.
• min - The minimum length of the string.

email

The email type want to match RFC 5322 email address.

• allowEmpty - allow empty string, default is false.

password

The password type want to match /^$/ type string.

• compare - Compare field to check equal, default null, not check.
• max - The maximum length of the password.
• min - The minimum length of the password, default is 6.

enum

If type is enum, it requires an addition rule:

• values - An array of data, value must be one on them. this rule is required.

object

If type is object, there has one addition rule:

• rule - An object that validate the properties ot the object.

array

If type is array, there has tow addition rule:

• itemType - The type of every item in this array.
• rule - An object that validate the items of the array. Only work with itemType.

abbr

• 'int' => {type: 'int', required: true}
• 'integer' => {type: 'integer', required: true}
• 'number' => {type: 'number', required: true}
• 'date' => {type: 'date', required: true}
• 'dateTime' => {type: 'dateTime', required: true}
• 'id' => {type: 'id', required: true}
• 'boolean' => {type: 'boolean', required: true}
• 'bool' => {type: 'bool', required: true}
• 'string' => {type: 'string', required: true, allowEmpty: false}
• 'email' => {type: 'email', required: true, allowEmpty: false, format: EMAIL_RE}
• 'password' => {type: 'password', required: true, allowEmpty: false, format: PASSWORD_RE, min: 6}
• 'object' => {type: 'object', required: true}
• 'array' => {type: 'array', required: true}
• [1, 2] => {type: 'enum', values: [1, 2]}
• /\d+/ => {type: 'string', required: true, allowEmpty: false, format: /\d+/}

## `errors` examples

### `code: missing_field`

```js
{
  code: 'missing_field',
  field: 'name',
  message: 'name required'
}

code: invalid

{
  code: 'invalid',
  field: 'age',
  message: 'age should be an integer'
}

License

MIT