joi_1.default.validate is not a function

You fix it by changing joi.validate(request, validationSchema to validationSchema.validate(request As joi.validate() is no longer supported in v16. It is clearly documented in the API docs and release notes.

I experienced joi.validate() is not a function also. I checked their documentation and got a fix for it.

    const Joi = require('@hapi/joi');

const schema = Joi.object({
    name:Joi.string().min(6).required(),
    email:Joi.string().min(6).required().email(),
    password:Joi.string().min(6).required()
});

router.post('/register',  (req, res) => {

    // VALIDATE BEFORE SAVING A USER 
    const Validation = schema.validate(req.body);
    res.send(Validation);

    
})

This works as expected and gives no further error.

Update version of joi doesn't work with Joi.validate(req.body,schema); No need to use the object separately. Use this as following. It Worked for me smoothly. Do let me know if I am wrong at anything:

const Joi = require('@hapi/joi');

const schema = Joi.object({
    name:Joi.string().min(3).required(),
    email:Joi.string().min(4).required().email(),
    password:Joi.string().min(6).required()
});





router.post('/register', async (req,res) => {


    //updated joi
    
   // This is a shorter version
    const { error } = schema.validate(req.body);

    // Error in response

    res.send(error.details[0].message);


    // WORKING WITH DEPRECATED VERSION
    // const Validation = Joi.validate(req.body,schema);
    // res.send(Validation);

Hit the same problem when using express-joi-validation.

If it's ok for you to use version 15, downgrade Joi will make it.

npm uninstall --save @hapi/joi
npm install --save @hapi/[email protected]