Joi validation when multiple conditions are met

Question

I need to validate one field of object when two fields of same object is true. I have an object like

person={
 is_active: // either true or false
 is_valid: // either true or false
 username :'' // validation required field
}

so i have to do validation like

if (is_active==true && is_valid==true)

then only i have to validate username like

Joi.string().required()

I have tried the nested when condition but it throws Assertion Error

Answer 1

如此处对用户名所述，使用is子句