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: '[email protected]'
}

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