I have a function that returns a Joi schema. The string in that schema can either be required or optional.
Here is my function:
function myString(required) {
const schema = Joi.string();
if (required) schema.required();
return schema;
}
Calling myString(true) does not apply .required(). However, the string is required if my function is defined as:
function myString() {
const schema = Joi.string().required();
return schema;
}
I wanted a function to apply that conditional .required() (and other validations) so I don't waste time writing Joi.string() or Joi.string().required() everywhere.
So, the following doesn't fit my need:
function myString(required) {
return required ? Joi.string().required() : Joi.string();
}
Why is my first function not working? How can I make it work?
joi function return this instance you need to store that to variable. it's builder
function myString(required) {
let schema = Joi.string();
if (required) {
schema = schema.required();
}
return schema;
}