'Swashbuckle and Web Api method with ModelBinder

I have a C# WebAPI project with a method that uses a custom ModelBinder for its input parameter. When I look at the Swagger UI that Swashbuckle generates, rather than having a single "body" parameter, all of the properties' of the method's parameters are listed out separately. If I get rid of the [ModelBinder] attribute and switch to using the [FromBody] attribute, the Swagger UI shows the right thing. I have to use the [ModelBinder] attribute, so switching that out isn't an option.

Is there a way to make Swashbuckle generate the "[FromBody] attribute style" single parameter rather than the multiple parameters that it's doing?

c++sharpasp.net-web-api2swagger-uiswashbuckle


Solution 1:[1]

Ondrej is right. Just chain them:

IHttpActionResult Foo([FromBody][ModelBinder]SomeModel model)

Solution 2:[2]

Want to add that for Swashbuckle the order of attributes is important:

IActionResult Foo([FromBody, ModelBinder(typeof(SomeModelBinder))]SomeModel model)

will produce a correct OpenApi schema with SomeModel ref in requestBody.

But

IActionResult Foo([ModelBinder(typeof(SomeModelBinder)), FromBody]SomeModel model)

will produce an OpenApi schema with SomeModel defined as a query parameter

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Brent Arias
Solution 2 tseshevsky

Related Questions