Custom Converters are not excluded if not registered for Http Message Converter. Fixes #2165

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/service/GenericParameterService.java

@@ -366,7 +366,7 @@ Schema calculateSchema(Components components, ParameterInfo parameterInfo, Reque
 				WebConversionServiceProvider webConversionServiceProvider = optionalWebConversionServiceProvider.get();
 				if (!MethodParameterPojoExtractor.isSwaggerPrimitiveType((Class) type) && methodParameter.getParameterType().getAnnotation(io.swagger.v3.oas.annotations.media.Schema.class) == null) {
 					Class<?> springConvertedType = webConversionServiceProvider.getSpringConvertedType(methodParameter.getParameterType());
-					if (!(String.class.equals(springConvertedType) && ((Class<?>) type).isEnum()))
+					if (!(String.class.equals(springConvertedType) && ((Class<?>) type).isEnum()) && requestBodyInfo==null)
 						type = springConvertedType;
 				}
 			}

springdoc-openapi-starter-webmvc-api/src/test/java/test/org/springdoc/api/v30/app183/SpringDocApp183Test.java

@@ -27,9 +27,36 @@
 import test.org.springdoc.api.v30.AbstractSpringDocV30Test;
 
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
 
 public class SpringDocApp183Test extends AbstractSpringDocV30Test {
 
 	@SpringBootApplication
-	static class SpringDocTestApp {}
+	static class SpringDocTestApp {
+
+		record ObjectA(String aa, String aaa) {}
+
+		record ObjectB(Integer bb, Integer bbb) {}
+
+		@Component
+		class BToAConvertor implements Converter<ObjectB, ObjectA> {
+			@Override
+			public ObjectA convert(ObjectB source) {
+				return new ObjectA(source.bb+"", source.bbb+"");
+			}
+		}
+
+		@RestController
+		class Controller {
+			@PostMapping("/test")
+			public String test(@RequestBody ObjectA request) {
+				return "OK!";
+			}
+		}
+	}
+
 }

springdoc-openapi-starter-webmvc-api/src/test/resources/results/3.0.1/app183.json

@@ -17,6 +17,36 @@
     }
   ],
   "paths": {
+    "/test": {
+      "post": {
+        "tags": [
+          "controller"
+        ],
+        "operationId": "test",
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/ObjectA"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "*/*": {
+                "schema": {
+                  "type": "string"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/{userId}": {
       "get": {
         "tags": [
@@ -50,6 +80,17 @@
   },
   "components": {
     "schemas": {
+      "ObjectA": {
+        "type": "object",
+        "properties": {
+          "aa": {
+            "type": "string"
+          },
+          "aaa": {
+            "type": "string"
+          }
+        }
+      },
       "User": {
         "type": "object",
         "properties": {