#4781 Jackson/@JsonUnwrapped - when innerModel.$ref not null - unwrapping does not happen

Author: mironbalcerzak

modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/ModelResolver.java

@@ -727,7 +727,7 @@ public Schema resolve(AnnotatedType annotatedType, ModelConverterContext context
                             .ctxAnnotations(null)
                             .jsonUnwrappedHandler(null)
                             .resolveAsRef(false);
-                        handleUnwrapped(props, context.resolve(t), uw.prefix(), uw.suffix(), requiredProps);
+                        handleUnwrapped(context, props, context.resolve(t), uw.prefix(), uw.suffix(), requiredProps);
                         return null;
                     } else {
                         return new Schema();
@@ -1307,7 +1307,13 @@ protected boolean ignore(final Annotated member, final XmlAccessorType xmlAccess
         return false;
     }
 
-    private void handleUnwrapped(List<Schema> props, Schema innerModel, String prefix, String suffix, List<String> requiredProps) {
+    private void handleUnwrapped(ModelConverterContext context, List<Schema> props, Schema innerModel, String prefix, String suffix, List<String> requiredProps) {
+        if (innerModel.get$ref() != null && innerModel.getProperties() == null) {
+            Schema resolvedByRef = context.getDefinedModels().get(innerModel.get$ref().substring(21));
+            if (resolvedByRef != null) {
+                innerModel = resolvedByRef;
+            }
+        }
         if (StringUtils.isBlank(suffix) && StringUtils.isBlank(prefix)) {
             if (innerModel.getProperties() != null) {
                 props.addAll(innerModel.getProperties().values());