Valmo

A simple yet powerful way to ensure data validity.

Content

• Schema layout
• Getting started

Schema layout

Valmo uses the same schema standard as ajv as this is the validator Valmo uses. It is in turn based on json-schema.org. Both have great reasources on how to use schemas.

Getting started

Example project:

// index.js
const valmo = require("valmo")
const express = require("express")

const server = express()
server.use(express.json())
const port = 8080

const schema = require('./userSchema')

server.post(
    '/user',
    valmo.validate(schema, "request.body.user"),
    (request, response) => {
        response
            .status(200)
            .send("That is a valid user!")
            .end()
    }
)

server.listen(port, () => console.log(`Waiting for connections on port ${port}`))

// userSchema.js
module.exports = {
    "$schema": "http://json-schema.org/draft-07/schema#",
    "$id": "http://example.org/test.json",

    "title": "User",
    "description": "A user model for a website",
    "type": "object",

    "properties": {
        "username": {
            "description": "User identifier",
            "type": "string"
        },
        "email": {
            "description": "A users personal email",
            "type": "string"
        }
    },
    "required": [
        "username",
        "email"
    ]
};