How to use the ValidationError function from joi

Find comprehensive JavaScript joi.ValidationError code examples handpicked from public code repositorys.

joi.ValidationError is an error class used by the joi validation library to indicate when a validation error occurs.

templateValidator.js

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export-statistiques.utils.spec.js

GitHub: anct-cnum/api-conseiller-numerique

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  codePostal: '',
  test: 'error'
});

expect(schemaValidation).toEqual({
  error: new ValidationError('"test" is not allowed'),
  value: {
    dateDebut: new Date('2021-11-01T00:00:00.000Z'),
    dateFin: new Date('2021-12-31T11:00:00.000Z'),
    type: 'user',

+ 4 other calls in file

How does joi.ValidationError work?

joi.ValidationError is a class that represents the errors encountered during validation of a Joi schema, which provides information about the type of error, where it occurred in the schema, and a message describing the error. When validation fails, Joi throws an instance of this class containing all the relevant information about the error.

user.js

GitHub: RosjanaPK/BookingWebsite_WebproPJ

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router = express.Router();


const passwordValidator = (value, helpers) => {
    if (value.length < 8) {
        throw new Joi.ValidationError('Password must contain at least 8 characters')
    }
    if (!(value.match(/[a-z]/) && value.match(/[A-Z]/) && value.match(/[0-9]/))) {
        throw new Joi.ValidationError('Password must be harder')
    }

+ 11 other calls in file

GitHub: tathusphol/Project_webpro

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// const passwordValidator = (value, helpers) => {
//     if (value.length < 8) {
//         throw new Joi.ValidationError('Password must contain at least 8 characters')
//     }
//     if (!(value.match(/[a-z]/) && value.match(/[A-Z]/) && value.match(/[0-9]/))) {
//         throw new Joi.ValidationError('Password must be harder')
//     }
//     return value
// }

+ 21 other calls in file

Ai Example

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const Joi = require("joi");

const schema = Joi.object({
  username: Joi.string().alphanum().min(3).max(30).required(),
  email: Joi.string().email().required(),
});

If we validate an object that doesn't meet these criteria: javascript Copy code

app.js

GitHub: gauravrajkagwaniya/nodejs-learning

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// POST request handling 


// with endpoints
app.post('/api/courses', (req,res) => {


     // const result = Joi.ValidationError(req.body, schema);
    //  const result = validateData(req.body);
     // by obj destructure 
     const { error } = validateData(req.body);

+ 3 other calls in file

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