Need your help in setting up the library schema for Joi. Task, you need to do validation if the number of characters exceeds 8 characters after mas. I did it using custom validation, but I would like to use Joi use everywhere in the project:

   myField: Joi.number()
    .positive()
    .less(999999999999)
    .required()
    .error(() => ({
      message: 'Error',
    })),

4,23443234 - valid data

4,234432341 - invalid data

Need your help in setting up the library schema for Joi. Task, you need to do validation if the number of characters exceeds 8 characters after mas. I did it using custom validation, but I would like to use Joi use everywhere in the project:

   myField: Joi.number()
    .positive()
    .less(999999999999)
    .required()
    .error(() => ({
      message: 'Error',
    })),

4,23443234 - valid data

4,234432341 - invalid data

• javascript
• reactjs
• joi

1 Answer 1

You can find the solution by reading Joi's documentation:

number.precision(limit)

Specifies the maximum number of decimal places where:

• limit - the maximum number of decimal places allowed.

const schema = Joi.number().precision(2);

Using precision will by default just round the decimals to the specified maximum. If you want it to fail the validation instead, set convert to false as per the documentation:

joi.validate(objectToValidate, schema, {convert:false});