Object schema generated for Unit Kotlin type. Fixes #2798

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/configuration/SpringDocKotlinConfiguration.kt

@@ -30,6 +30,7 @@ import io.swagger.v3.oas.annotations.Parameter
 import org.springdoc.core.customizers.KotlinDeprecatedPropertyCustomizer
 import org.springdoc.core.customizers.ParameterCustomizer
 import org.springdoc.core.providers.ObjectMapperProvider
+import org.springdoc.core.service.AbstractRequestService.addRequestWrapperToIgnore
 import org.springdoc.core.utils.Constants
 import org.springdoc.core.utils.SpringDocUtils
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean
@@ -69,6 +70,7 @@ class SpringDocKotlinConfiguration() {
 	 */
 	init {
 		SpringDocUtils.getConfig()
+			.addResponseTypeToIgnore(Unit::class.java)
 			.addRequestWrapperToIgnore(Continuation::class.java)
 			.addDeprecatedType(Deprecated::class.java)
 	}

springdoc-openapi-tests/springdoc-openapi-kotlin-webflux-tests/src/test/kotlin/test/org/springdoc/api/app2/SystemStatusController.kt

@@ -18,9 +18,15 @@
 
 package test.org.springdoc.api.app2
 
+import jakarta.validation.Valid
 import kotlinx.coroutines.reactor.mono
+import org.springframework.http.HttpStatus
 import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestBody
 import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.ResponseStatus
 import org.springframework.web.bind.annotation.RestController
 
 enum class SystemStatus(val status: String) {
@@ -41,4 +47,13 @@ class SystemStatusController {
 	fun foo() = mono {
 		SystemStatusResponse(SystemStatus.OK)
 	}
+
+	@PostMapping("{token}/activate")
+	@ResponseStatus(HttpStatus.NO_CONTENT)
+	suspend fun activateUser(
+		@PathVariable token: String,
+		@RequestBody @Valid request: String
+	) {
+		// do something
+	}
 }

springdoc-openapi-tests/springdoc-openapi-kotlin-webflux-tests/src/test/resources/results/app2.json

@@ -11,6 +11,40 @@
     }
   ],
   "paths": {
+    "/status/{token}/activate": {
+      "post": {
+        "tags": [
+          "system-status-controller"
+        ],
+        "operationId": "activateUser",
+        "parameters": [
+          {
+            "name": "token",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "type": "string"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "204": {
+            "description": "No Content",
+            "content": {}
+          }
+        }
+      }
+    },
     "/status": {
       "get": {
         "tags": [