Problem with multiple when and conditional forbidden field #822
Description
I currently try to implement a validation where the existence or validation of an attribute in an object is dependent on another attribute.
I tried with a chain of any.when():
const Joi = require('joi');
const schemaWhen = Joi.object().keys({
a: Joi.string().valid('1','2').required(),
b: Joi
.when('a', {is: '1', then: Joi.forbidden() })
.when('a', {is: '2', then: Joi.number().integer().min(1).max(5).required() })
});
Joi.assert({a: '1'}, schemaWhen); // Pass
Joi.assert({a: '1', b: 50}, schemaWhen); // Fail
Joi.assert({a: '2', b: 5}, schemaWhen); // Pass
Joi.assert({a: '2', b: 50}, schemaWhen); // Pass. But should Fail?... and with alternative:
const Joi = require('joi');
const schemaAlternative = {
a: Joi.string().valid('aa','ab', 'ac').required(),
b: Joi.alternatives()
.when('a', {is: 'aa', then: Joi.string().valid('ba', 'bb').required()})
.when('a', {is: 'ab', then: Joi.string().valid('bc').required()})
.when('a', {is: 'ac', then: Joi.forbidden()})
};
Joi.assert({ a: 'aa', b: 'ba' }, schemaAlternative); // Pass
Joi.assert({ a: 'aa', b: 'bb' }, schemaAlternative); // Pass
Joi.assert({ a: 'ab', b: 'bc' }, schemaAlternative); // Pass
Joi.assert({ a: 'ac' }, schemaAlternative); // Pass
Joi.assert({ a: 'aa', b: 'bc' }, schemaAlternative); // Fail
Joi.assert({ a: 'ab', b: 'ba' }, schemaAlternative); // Fail
Joi.assert({ a: 'ac', b: 'ba' }, schemaAlternative); // Fail
Joi.assert({ a: 'aa' }, schemaAlternative); // Pass. But should Fail?
Joi.assert({ a: 'ab' }, schemaAlternative); // Pass. But should Fail?..., but had no luck so far.
I even think the result should be considered a bug, or am I missing something?