Validation error if an empty integer parameter is passed that is not mandatory

[TactiusTertius]

Q&A

• OS: Windows 10
• Browser: chrome
• Version: 88.0.4324.150
• Method of installation: npm
• Swagger-UI version: 3.42.0
• Swagger/OpenAPI version: Swagger 2.0, OpenAPI 3.0

Content & configuration

"FDBTitleFilter--titletypeid": {
"name": "titletypeid",
"in": "query",
"description": "to filter by title type id.",
"required": false,
"schema": {
"type": "integer",
"format": "int32",
"nullable": true
},
"example": null
}

Describe the bug you're encountering

Since version 3.42.0 there is a validation error if there is no input for an integer defined field.
It is irrelevant whether the parameter was declared nullable or not.

To reproduce...

Steps to reproduce the behavior:

1. Define an integer request parameter that is not required
2. Perform a query with empty parameter
3. See error

Expected behavior

See screenshot

Screenshots

[mathis-m]

Minimal Reproduction yaml: https://editor.swagger.io/?url=https://gist.githubusercontent.com/mathis-m/c91a866c88a62e8cd2c9cf4f509ca757/raw/8d6fbfe50f2be1f15cee622297a721bd8ca79b1a/MMvSCoiMOH.txt