Pass joi's options when validating schema

[YonatanKiron]

Alternatively to https://github.com/AndrewKeig/express-validation/pull/127

The issue is that when you overload the req object with an extra property you will get ValidationError.

E.g.,

Joi.assert(
  Joi.object({body: {}, foo: {}}), 
  Joi.object(parameters.reduce((result, item) => ({ ...result, [item]: Joi.object() }), {})).required().min(1)
)

Will fail.

While:

Joi.assert(
  Joi.object({body: {}, foo: {}}), 
  Joi.object(parameters.reduce((result, item) => ({ ...result, [item]: Joi.object() }), {})).required().min(1),
  {allowUnknown: true}
)

Will success

[asafel]

This is really needed! Thanks @YonatanKiron

[YonatanKiron]

@AndrewKeig Any update?

[papandreou]

~Is this addressing the same need as https://github.com/AndrewKeig/express-validation/pull/127?~ Edit: Sorry, you did specify that :sweat_smile:

Please include a test.

[papandreou]

I have to admit that I'm not really a fan of dual-purposing the joi parameter.