akashi-json-validator

JSON Validator

Yet another stupid JSON/Object validator.

Made for Akashi project to validate project/pattern files.

NOTICE: This module will support Node.js version from 6.9.0 (LTS Boron)

Usage

JsonValidator.validateJson(input, rules)

• input <String or Buffer> JSON string, or buffer of JSON Input JSON should be an object.
• rules <Array> Validation rules

Validation Rule

rules parameter will accept an array of validation rules.

One validation rule will validate one object property. One validation rule can have following properties:

key <String> - REQUIRED

Name of a single object property. This is required for every validation rule.

optional <Boolean>

Whether this object property is required, or optional.

By default, every property with a validation rule will be required. Setting optional to false will not make error if a object property doesn't exist.

type <String or Array>

One of "boolean", "number", "integer", "string", "array", "object".

integer is special type to represent a number without fractional part. number type will also cover integer type.

In Javascript, typeof [] is "object", but in this validator, array has a special type of array.

By setting type to an array of the types above, an object property can be multiple types.

eq <Boolean, Number, String, or Array>

neq <Boolean, Number, String, or Array>

Setting eq or neq to a Boolean, Number, String type will test whether object property's value (does not) equals to the specified value.

By setting eq or neq to an array, it will look up for the expected value.

gt <Number or Array>

gte <Number or Array>

lt <Number or Array>

lte <Number or Array>

Setting gt, gte, lt, or lte to a Number type will test whether object property's value is greater/lesser than (or equals to) the specified value.

By setting gt, gte, lt, or lte to an array, it will look up for the comparison value.

in <Array>

Check for the object property value type strictly equals to the one of given array.

unique <String>

Check for the object property value is unique for the given scope.

each <Object>

Test each element of an array by given validation rule.

Validation rule can have any property from above or below, but key property won't have any meaning, since element of array don't have a key.

child <Array>

Test each property of an object by given validation rules.

Lookup (eq, neq, gt, gte, lt, lte)

By setting some property to an array, it can get another property's value to test.

Lookup Examples

• eq: ["a"] : Get the value of property a at the same scope, and check for the equality.
• eq: ["a", "b"] : Get the value of property a.b at the same scope, and check for the equality. (a should be an Object at here)
• eq: ["a", 0] : Get the value of property a[0] at the same scope, and check for the equality. (a should be an Array at here)
• eq: ["$parent", "a"] : Get the value of property b at the parent scope, and check for the equality.