Error thrown with empty query parameter does not have errorCode

[macyabbey-okta]

Describe the bug

When a query parameter is empty, the BadRequest error thrown by express-openapi-validator does not contain an errorCode property, whereas other errors do.

To Reproduce

Specify a parameter schema such as:

name: after
description: The after cursor provided by a prior request.
in: query
required: false
schema:
  type: string
  # mongo id length/pattern
  maxLength: 24
  minLength: 24
  pattern: ^[a-fA-F\d]{24}$

Then make a request like:

GET /foo?after=

Actual behavior

The thrown error has a structure like:

{
  name: 'Bad Request',
  path: '/query/after',
  message: "Empty value found for query parameter 'after'",
  errors: [
    {
      path: '/query/after',
      message: "Empty value found for query parameter 'after'"
    }
  ]
}

Expected behavior The thrown error should have an errorCode like:

{
  name: 'Bad Request',
  path: '/query/after',
  message: "Empty value found for query parameter 'after'",
  errors: [
    {
      path: '/query/after',
      message: "Empty value found for query parameter 'after'",
      errorCode: 'empty.openapi.validation'
    }
  ]
}

Examples and context Snippets provided above.