When extends JpaRepository, using @parameter over the method results in duplicate of the same parameter. Fixes #2038

Author: bnasslahsen

springdoc-openapi-starter-common/src/main/java/org/springdoc/core/data/DataRestOperationService.java

@@ -38,6 +38,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springdoc.core.models.MethodAttributes;
+import org.springdoc.core.service.GenericParameterService;
 import org.springdoc.core.service.OperationService;
 import org.springdoc.core.utils.SpringDocAnnotationsUtils;
 
@@ -209,9 +210,14 @@ private Operation buildSearchOperation(HandlerMethod handlerMethod, DataRestRepo
 				Type type = getParameterType(pName,method,description);
 				Schema<?> schema = SpringDocAnnotationsUtils.extractSchema(openAPI.getComponents(), type, null, null);
 				Parameter parameter = getParameterFromAnnotations(openAPI, methodAttributes, method, pName);
-				if (parameter == null)
+				if (parameter == null) {
 					parameter = new Parameter().name(pName).in(ParameterIn.QUERY.toString()).schema(schema);
-				operation.addParametersItem(parameter);
+					operation.addParametersItem(parameter);
+				}
+				else if (CollectionUtils.isEmpty(operation.getParameters()))
+					operation.addParametersItem(parameter);
+				else
+					GenericParameterService.mergeParameter(operation.getParameters(), parameter);
 			}
 		}
 

springdoc-openapi-tests/springdoc-openapi-data-rest-tests/src/test/java/test/org/springdoc/api/app37/ProductRepository.java

@@ -9,6 +9,7 @@
 
 import ch.qos.logback.core.rolling.helper.DateTokenConverter;
 import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.enums.ParameterIn;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.repository.query.Param;
@@ -23,6 +24,13 @@
 @RepositoryRestResource(path = "product")
 public interface ProductRepository extends JpaRepository<ProductEntity, Long> {
 
+	List<ProductEntity> findByPrice( @Parameter(
+			name = "price",
+			description = "test desc",
+			in = ParameterIn.QUERY,
+			required = true
+	)
+	@Param("price")String price);
 	/**
 	 * 根据商品名称查询商品信息
 	 *

springdoc-openapi-tests/springdoc-openapi-data-rest-tests/src/test/resources/results/app37.json

@@ -326,12 +326,46 @@
         }
       }
     },
-    "/product/search/findTopByNameOrderByDateDesc": {
+    "/product/search/findByPrice": {
       "get": {
         "tags": [
           "product-entity-search-controller"
         ],
         "operationId": "executeSearch-productentity-get_5",
+        "parameters": [
+          {
+            "name": "price",
+            "in": "query",
+            "description": "test desc",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/hal+json": {
+                "schema": {
+                  "$ref": "#/components/schemas/CollectionModelEntityModelProductEntity"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Not Found"
+          }
+        }
+      }
+    },
+    "/product/search/findTopByNameOrderByDateDesc": {
+      "get": {
+        "tags": [
+          "product-entity-search-controller"
+        ],
+        "operationId": "executeSearch-productentity-get_6",
         "parameters": [
           {
             "name": "name2",