Joi validator body accepts object or array

Question

I would like to use Joi to validate an object or an array of objects.

I have tried doing this but it looks like it's checking for both an Array of entities and entity. I would like it to only check one or the other. entity is also a joi object.

Joi.alternatives().try(Joi.array().items(entity), entity)

For example, I want both of these bodies to be validated

1. array of entities

    [
    {name: "joe"},
    {name: "tim"},
    {name: "bob"}
    ]

2. single entity

    {name: "joe"}

What's the best way to do this?