Nullable Date

[brantian]

I have an interface like the following:

interface User {
   name: string,
   deactivate_on? : Date | null
}

The deactivate_on is optional but should be able to be nullable, to set the value as null in the database if it has previously been set with a date.

But if I submit a null value, the request fails as TSOA tries to validate null as a Date:

{
  message: 'Validation error: ',
  details: {
    'requestBody.user_properties.deactivate_on': {
      message: 'invalid ISO 8601 datetime format, i.e. YYYY-MM-DDTHH:mm:ss', 
      value: null
    }
  }
}

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Expected Behavior

Null value should be accepted and processed for the nullable field

Current Behavior

TSOA tries to validate the null value as a Date

Possible Solution

Steps to Reproduce

Context (Environment)

Version of the library: 6.5.1
Version of NodeJS: 18

• Confirm you were using yarn not npm: [ ]

Detailed Description

Breaking change?