express validaioon code example
Example 1: express validator example
const { validationResult, check } = require('express-validator')
exports.resultsValidator = (req) => {
const messages = []
if (!validationResult(req).isEmpty()) {
const errors = validationResult(req).array()
for (const i of errors) {
messages.push(i)
}
}
return messages
}
exports.registerValidator = () => {
return [
check('username')
.notEmpty()
.withMessage('username is required')
.not()
.custom((val) => /[^A-za-z0-9\s]/g.test(val))
.withMessage('Username not use uniq characters'),
check('password')
.notEmpty()
.withMessage('password is required')
.isLength({ min: 8 })
.withMessage('password must be 8 characters')
]
}
exports.loginValidator = () => {
return [
check('username').notEmpty().withMessage('username or email is required'),
check('password').notEmpty().withMessage('password is required')
]
}
const errors = resultsValidator(req)
if (errors.length > 0) {
return res.status(400).json({
method: req.method,
status: res.statusCode,
error: errors
})
}
route.post('/login', loginValidator(), (req, res) => {
return res.status(200).send('Login Sucessfuly');
});
route.post('/register', registerValidator(), (req, res) => {
return res.status(200).send('Register Sucessfuly');
});
Example 2: express validator
app.post('/form', [
check('name').isLength({ min: 3 }),
check('email').isEmail(),
check('age').isNumeric()
], (req, res) => {
const errors = validationResult(req)
if (!errors.isEmpty()) {
return res.status(422).json({ errors: errors.array() })
}
const name = req.body.name
const email = req.body.email
const age = req.body.age
})