Joi验证取决于其他嵌套属性是否为true

Question

我正在尝试验证以下内容，因此当“ l”为假时，“ xl”也必须为假。

xl: joi.object().keys({ 
    enabled: joi.boolean().required(),
    size: joi.number() 
    }).when('l.enabled', {
           is: false,
           then: 'xl.enabled needs to be false',
           otherwise: joi.boolean(),
  }),
l: joi.object().keys({ 
    enabled: joi.boolean().required(),
    size: joi.number() 
    }).when('m.enabled', {
           is: false,
           then: 'l.enabled needs to be false',
           otherwise: joi.boolean(),
  }),
m: ... continues on the same as above..

谢谢！