Empty API docs with nested routes

[DanyUP]

Im trying SpringDoc version 1.4.7 (with only springdoc-openapi-webflux-core module) with Spring Boot 2.3.4.RELEASE and Webflux Functional Endpoints.

I mapped the routes definition bean with RouterOperations as shown in this example:

    @Bean
    @RouterOperations({
            @RouterOperation(path = "/greeter/namedHello", beanClass = HelloHandler.class, beanMethod = "namedHello"),
            @RouterOperation(path = "/greeter/hello", beanClass = HelloHandler.class, beanMethod = "hello"),
    })
    public RouterFunction<ServerResponse> helloRoutes() {
        return nest(path("/greeter"),
                route(GET("/namedHello"), helloHandler::namedHello)
                .andRoute(GET("/hello"), helloHandler::hello)
        );
    }

However the output of calling http://localhost:8080/v3/api-docs shows an empty definition:

{
  "openapi":"3.0.1",
  "info":{
    "title":"OpenAPI definition",
    "version":"v0"
  },
  "servers":[{"url":"http://localhost:8080","description":"Generated server url"}],
  "paths":{},
  "components":{}}

If I remove the prefix path from RouterOperation path, like this

    @Bean
    @RouterOperations({
            @RouterOperation(path = "/namedHello", beanClass = HelloHandler.class, beanMethod = "namedHello"),
            @RouterOperation(path = "/hello", beanClass = HelloHandler.class, beanMethod = "hello"),
    })
    public RouterFunction<ServerResponse> helloRoutes() {
        return nest(path("/greeter"),
                route(GET("/namedHello"), helloHandler::namedHello)
                .andRoute(GET("/hello"), helloHandler::hello)
        );
    }

Something seems to change, however the path in the OpenAPI definition is wrong:

{
  "openapi":"3.0.1",
  "info":{
    "title":"OpenAPI definition",
    "version":"v0"
  },
  "servers":[
    {
      "url":"http://localhost:8080",
      "description":"Generated server url"
    }
  ],
  "paths":{
    "/hello":{
      "get":{
        "tags":[
          "hello-handler"
        ],
        "operationId":"hello",
        "responses":{
          "200":{
            "description":"OK",
            "content":{
              "application/json":{
                "schema":{
                  "$ref":"#/components/schemas/HelloResponseDef"
                }
              }
            }
          }
        }
      }
    },
    "/namedHello":{
      "get":{
        "tags":[
          "hello-handler"
        ],
        "operationId":"namedHello",
        "responses":{
          "200":{
            "description":"OK",
            "content":{
              "application/json":{
                "schema":{
                  "$ref":"#/components/schemas/ServerResponse"
                }
              }
            }
          }
        }
      }
    }
  },
  // JSON truncated

Here is the expected output:

{
  "openapi":"3.0.1",
  "info":{
    "title":"OpenAPI definition",
    "version":"v0"
  },
  "servers":[
    {
      "url":"http://localhost:8080",
      "description":"Generated server url"
    }
  ],
  "paths":{
    "/greeter/hello":{
      "get":{
        "tags":[
          "hello-handler"
        ],
        "operationId":"hello",
        "responses":{
          "200":{
            "description":"OK",
            "content":{
              "application/json":{
                "schema":{
                  "$ref":"#/components/schemas/HelloResponseDef"
                }
              }
            }
          }
        }
      }
    },
    "/greeter/namedHello":{
      "get":{
        "tags":[
          "hello-handler"
        ],
        "operationId":"namedHello",
        "responses":{
          "200":{
            "description":"OK",
            "content":{
              "application/json":{
                "schema":{
                  "$ref":"#/components/schemas/ServerResponse"
                }
              }
            }
          }
        }
      }
    }
  },
  // JSON truncated

Am I missing something?

[bnasslahsen]

@DanyUP,

Your first Syntax should work.
It's just the support was not completely added.

This feauture is now available on master. And you can test it using the last SNAPSHOT.