Their Guru's
I'm doin a research on a code I saw on the internet, but if I see the syntax, they have used Hapi/Joi which is depricated. My question is how can I use this syntax in Joi?
app.post('/test', (req, res, next) => {
const id = Math.ceil(Math.random() * 9999999);
Joi.validate(data, schema, (err, value) => {
if (err) {
res.status(400).json({
status: 'error',
message: 'Invalid request data',
data: data
});
} else {
res.status(200).json({
status: 'success',
message: 'User created successfully',
data: Object.assign({id}, value)
});
}
});
});
Inspecting the types file ( index.ds.ts ) on Github , there is in fact no callback-style validate function, just those two methods:
/** * Validates a value using the schema and options. */ validate(value: any, options?: ValidationOptions): ValidationResult; /** * Validates a value using the schema and options. */ validateAsync(value: any, options?: AsyncValidationOptions): Promise<any>; However, you can use util.callbackify - callback examples to transform validateAsync into a callback node style if you really want to:
const Joi = require('joi'); const { callbackify } = require('util'); // A very simple data object const obj = { a: 23 }; // A very simple joi schema which checks if schema is an object with the `a` property being a string const schema = Joi.object({ a: Joi.string(), }); // Callback style (which i don't recommend since its not available in `joi` package) callbackify(() => schema.validateAsync(obj))((err, ret) => { if (err) { return res.status(400).json({ status: 'error', message: 'Invalid request data', data: data, }); } res.status(200).json({ status: 'success', message: 'User created successfully', data: Object.assign({ id }, value), }); }); I would use what Joi provides, like in the following 2 examples:
// using async/await - you need to mark you controller as async, like: // app.post('/test', async (req, res, next) => ... try { await schema.validateAsync(obj); res.status(200).json({ status: 'success', message: 'User created successfully', data: Object.assign({ id }, value), }); } catch (err) { res.status(400).json({ status: 'error', message: 'Invalid request data', data: data, }); }Or even with just promises:
schema .validateAsync(obj) .then(() => res.status(200).json({ status: 'success', message: 'User created successfully', data: Object.assign({ id }, value), }) ) .catch(() => res.status(400).json({ status: 'error', message: 'Invalid request data', data: data, }) );