Swashbuckle.AspNetCore 5.0.0-rc4 UploadFileFilter doesn't work - asp.net-core

Question

I need to add upload file for Swashbuckle.AspNetCore 5.0.0-rc4. In earlier version it works like:
public class SwaggerUploadFileParametersFilter : IOperationFilter
{
public void Apply(Operation operation, SchemaRegistry schemaRegistry, ApiDescription apiDescription)
{
if (operation.parameters != null)
{
var attribute =
apiDescription.ActionDescriptor.GetCustomAttributes<UploadFileParametersAttribute>()
.FirstOrDefault();
if (attribute != null)
{
operation.consumes.Add("multipart/form-data");
operation.parameters.Add(new Parameter
{
name = "file",
required = true,
type = "file",
#in = "formData"
}
);
}
}
}
}
[UploadFileParameters]
public async Task<IHttpActionResult> MyMethod([FromUri]MyMethodParams parameters)
I try to implement it using Microsoft.OpenApi.Models objects:
public class SwaggerUploadFileParametersFilter : IOperationFilter
{
public void Apply(OpenApiOperation operation, OperationFilterContext context)
{
var actionAttributes = context.MethodInfo.GetCustomAttributes<UploadFileParametersAttribute>().FirstOrDefault();
if (actionAttributes != null)
{
operation.RequestBody = new OpenApiRequestBody()
{
Content =
{
["multipart/form-data"] = new OpenApiMediaType()
{
Schema = new OpenApiSchema()
{
Properties =
{
["file"] = new OpenApiSchema()
{
Description = "Select file",
Type = "file"
}
}
}
}
}
};
}
}
}
But it doesn't work. I don't see file component in swagger

Answer 1

I took your code and some documentation from Swagger File Upload
I modified your code and added small fix
public class SwaggerUploadFileParametersFilter : IOperationFilter
{
public void Apply(OpenApiOperation operation, OperationFilterContext context)
{
var parameters = operation.Parameters;
if (parameters == null || parameters.Count == 0)
{
return;
}
var isUploadFile = context.ApiDescription.ActionDescriptor.Parameters.Any(x => x.ParameterType == typeof(IFormFile));
if (isUploadFile)
{
operation.RequestBody = new OpenApiRequestBody()
{
Content =
{
["multipart/form-data"] = new OpenApiMediaType()
{
Schema = new OpenApiSchema()
{
Type = "object",
Properties =
{
["file"] = new OpenApiSchema()
{
Description = "Select file", Type = "string", Format = "binary"
}
}
}
}
}
};
}
}
}
And controller:
[HttpPost]
[ProducesResponseType(StatusCodes.Status200OK)]
[ProducesDefaultResponseType]
public async Task<IActionResult> UploadFileAsync([FromForm] IFormFile file)