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@webarthur
Last active July 21, 2023 14:26
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Middleware for ExpressJS to validate the request data against a schema using Mongoose.
const express = require('express')
const Article = require('./article.model.js')
const validate = require('./validate.middleware.js')
const router = express.Router()
router.get('/articles',
validate('query', {
title: String,
text: String,
}),
(req, res, next) => {
Article.find(req.query)
.then(result => res.json(result))
.catch(error => next(error))
})
router.patch('/articles/:id',
validate('body', {
title: String,
text: String,
}),
(req, res, next) => {
Article.create(req.body)
.then(result => res.json(result))
.catch(error => next(error))
})
module.exports = router
const mongoose = require('mongoose')
/**
* Validates the request data against a schema using Mongoose.
* @param {string} type - The type of data to validate (e.g., 'body', 'params', 'query').
* @param {object} rawSchema - The raw schema object to validate against.
* @param {Object} options - Additional options for validation (default: {}).
* @returns {Function} - Middleware function to validate the data.
*/
function validate (type, rawSchema) {
const schema = new mongoose.Schema(rawSchema, {
_id: false,
autoCreate: false,
versionKey: false,
timestamps: false,
})
const Model = mongoose.model('validate-' + Date.now(), schema)
// Middleware function to validate the request data.
return function (req, res, next) {
const rawData = req[type]
const model = new Model(rawData)
const error = model.validateSync()
if (error) {
res.status(400).json(error)
return
}
// Update request property
req[type] = model
next()
}
}
module.exports = validate
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