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molijv
molijv/molijv.js

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Readme

MoliJV - Mongoose-Like JSON Validador

JSON validator inspired by Mongoose for Node.js.

Type validation and coercion similar to Mongoose, but with no external dependencies.
Supports types: String, Number, Boolean, Date, Int32, Decimal128, Double, Array, Object.
Allows defining validation schemas in a simple and flexible way.

Installation

npm install molijv

Quick Example

import { Schema } from 'molijv'

const userSchema = new Schema({
  name: { type: String, required: true, trim: true },
  age: { type: Number, min: 0 },
  email: { type: String, match: /@/, message: 'Invalid email' }
})

const user = {
  name: '  Arthur  ',
  age: '22',
  email: 'arthur@email.com'
}

userSchema.validate(user) // returns validated/coerced object or throws error

Features

Type validation and automatic coercion (optional)
Customizable error messages
Supports custom validation, enum, min/max, required, match (regex), default, etc.
Inspired by Mongoose schema API

API Documentation

Class: `Schema`

Creates a validator from a schema.

`new Schema(schemaDef, options?)`

schemaDef: Object that defines the schema (types, validations, etc)
options: (optional) { coerce: boolean } (default: true)

`validate(data)`

Validates and (optionally) coerces the input data.

data: Object to be validated
Returns: validated/coerced object (may be the same or a new object)
Throws: Error if validation fails

Supported types

String, Number, Boolean, Date, Int32, Decimal128, Double, Array, Object

Field options

type: Field type
required: true or [true, "message"]
min, max: For numbers or dates. Ex: { min: 0 }
enum: List of allowed values or [values, "message"]
match: Regex or [regex, "message"]
default: Default value
validate: Custom function or [function, "message"]
trim, lowercase, uppercase: For strings

Full schema example

const schema = new Schema({
  name: { type: String, required: [true, 'Name is required'], trim: true },
  age: { type: Int32, min: 0, max: 120 },
  email: { type: String, match: [/@/, 'Invalid email'] },
  tags: [String],
  createdAt: { type: Date, default: () => new Date() }
})

License

MIT

molijv