express-validator-errors

express-validator-errors

Error json serializer for consistent errors when using express-validator

Combines errors from different sources:
- errors in serializer function argument
- errors in req.body.errors
- errors in req.validationErrors()

$3

#### Data Validation

errors.addToReq - add your own errors to to express-validator's _validationErrors without mixing in new validators
errors.serialize - outputs all known validation errors

``js
var errors = require('express-validator-errors')

var isValid = function (req) {
if (!req.body.objects)
errors.addToReq(req, 'objects', 'Root objects array is required', req.body)

req.checkBody(['objects', 0, 'title'], 'Title is required').notEmpty()

return req.validationErrors().length == 0
}

var expressReqHandler = function (req, res) {
if (isValid(req)) {
// ... happiness
} else {
res.json(400, errors.serialize(req))
}
}

// example input =>
// { objects: [{}] }

// outputs =>
// {
// "errors": [
// {
// "param": "objects.0.title",
// "msg": "Title is required"
// }
// ]
// }

`

#### Error Handling

errors.serialize - outputs all known validation errors and the specific errors you ask it to output. Options are:
- Null (in which case, errors on req are serialized)
- Single error
- Array of errors
- Single Error object

`js
var errors = require('express-validator-errors')

var expressReqHandler = function (req, res) {
doSomethingThatSometimesErrors(function (err, data) {
if (err)
return res.json(500, errors.serialize(new Error('An error occurred'), req(

// ... happiness
}
}

// example output =>
// {
// "errors": [
// {
// "exception": {
// "message": "An error occurred",
// "stack": "... file stack trace ..."
// }
// }
// ]
// }
``