express-json-schema-validation

Express JSON Schema validation middleware

How to use:

npm i express-json-schema-validation

Define your schema with JSON Schema http://json-schema.org

model.json :

``
{
"title": "model",
"type": "object",
"properties": {
"id": {
"type": "string"
}
}
"required": ["id"],
"additionalProperties": false
}

`

Use it in express router:

`
import model from './schemas/model.json'
import { ValidationMiddleware, Validator } from 'express-json-schema-validation'

const validate = new ValidationMiddleware({ model })
const router = new Router()
router.post('/models', validate('model'), ModelController.get)
`

Handle validation errors in express error handler:

`
function handleErrors (errors, req, res, next) {
res.status(422).json(errors)
}
`

Validate errors:
`
const validator = new Validator({ model })
const errors = validator.validate('model', object)
if (errors) {
// ValidationErrors
}
`

Error format:
`
ValidationError({
code: 'EVALIDATION',
pointer: '/id' // invalid property pointer,
message: 'validation error' // validation message
})
``