Allow only specific values for key in Joi schema

Is there any other way to set specific values in Joi validation schema for key except regex pattern?

My example schema:

const schema = joi.object().keys({
query: joi.object().keys({
// allow only apple and banana
id: joi.string().regex(/^(apple|banana)$/).required(),
}).required(),
})

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小开

最佳答案

You can also use valid like

const schema = joi.object().keys({
query: joi.object().keys({
// allow only apple and banana
id: joi.string().valid('apple','banana').required(),
}).required(),
})

Reference: https://github.com/hapijs/joi/blob/v13.1.2/API.md#anyvalidvalue---aliases-only-equal

小开

If you want to accept one or more values (apple, banana or both) you can use allow: https://joi.dev/api/?v=17.3.0#anyallowvalues

小开

You can try with .valid() to allow joi only with that specific string .

const schema = joi.object().keys({
query: joi.object().keys({
role: joi.string().valid('admin','student').required(), // joi would allow only if role is admin or student.
}).required(),
})

This is absolutely equal to giving "enam" field in mongoose ODM for representing objects in mongodb.