mongoose-error-humanizer

Mongoose post hook handler to automatically convert validation and dup errors into human friendly strings

Important: This package cannot detect when mongoose custom error messages are used in your schema (https://mongoosejs.com/docs/validation.html#custom-error-messages). Do not use this package if you need your custom error messages to be thrown.

Example Error Messages

| Case | Example |
| ----------- | ----------- |
| required field missing | name required |
| multiple, required fields missing | email required, name required |
| index (unique) violation | email must be unique |
| enum violation | country cannot be other |
| string min length violation | city must be at least 1 character(s) long |
| string max length violation | city cannot be more than 10 character(s) long |
| number min violation | age must be at least 1 |
| number max violation | age cannot exceed 100 |
| nested field violations | birthday.year must be at least 1900 |

Thrown errors are of type MongooseHumanError (an extension of the Error class).

Usage

``js
const mongoose = require('mongoose')
const humanizeErrors = require('mongoose-error-humanizer')

const schema = new mongoose.Schema({
name: { type: String, required: true, unique: true }
})

schema.post('save', humanizeErrors)
schema.post('update', humanizeErrors)

module.exports = mongoose.model('MyModel', schema)
``