upgrade spring-boot version to 2.3.2.RELEASE. Fixes #806

Author: bnasslahsen

build.gradle

@@ -8,7 +8,7 @@ plugins {
 }
 
 ext {
-	springBootVersion = '2.3.0.RELEASE'
+	springBootVersion = '2.3.2.RELEASE'
 	swaggerApiVersion = '2.1.4'
 	swaggerUiVersion = '3.30.0'
 }

springdoc-openapi-data-rest/src/main/java/org/springdoc/data/rest/customisers/QuerydslPredicateOperationCustomizer.java

@@ -154,8 +154,9 @@ private QuerydslBindings extractQdslBindings(QuerydslPredicate predicate) {
 	 */
 	private Set<String> getFieldValues(QuerydslBindings instance, String fieldName) {
 		try {
-			Field field = FieldUtils.getDeclaredField(instance.getClass(),fieldName,true);
-			return (Set<String>) field.get(instance);
+			Field field = FieldUtils.getDeclaredField(instance.getClass(), fieldName, true);
+			if (field != null)
+				return (Set<String>) field.get(instance);
 		}
 		catch (IllegalAccessException e) {
 			LOGGER.warn(e.getMessage());
@@ -172,7 +173,7 @@ private Set<String> getFieldValues(QuerydslBindings instance, String fieldName)
 	 */
 	private Map<String, Object> getPathSpec(QuerydslBindings instance, String fieldName) {
 		try {
-			Field field = FieldUtils.getDeclaredField(instance.getClass(),fieldName,true);
+			Field field = FieldUtils.getDeclaredField(instance.getClass(), fieldName, true);
 			return (Map<String, Object>) field.get(instance);
 		}
 		catch (IllegalAccessException e) {
@@ -192,7 +193,7 @@ private Optional<Path<?>> getPathFromPathSpec(Object instance) {
 			if (instance == null) {
 				return Optional.empty();
 			}
-			Field field = FieldUtils.getDeclaredField(instance.getClass(),"path",true);
+			Field field = FieldUtils.getDeclaredField(instance.getClass(), "path", true);
 			return (Optional<Path<?>>) field.get(instance);
 		}
 		catch (IllegalAccessException e) {

springdoc-openapi-data-rest/src/test/resources/results/app5.json

@@ -33,6 +33,13 @@
               }
             }
           },
+          {
+            "name": "codeISO3166",
+            "in": "query",
+            "schema": {
+              "type": "string"
+            }
+          },
           {
             "name": "code",
             "in": "query",
@@ -69,6 +76,13 @@
               "type": "string"
             }
           },
+          {
+            "name": "dialingCode",
+            "in": "query",
+            "schema": {
+              "type": "string"
+            }
+          },
           {
             "name": "status",
             "in": "query",