#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

@@ -118,6 +118,8 @@ public class ModelResolver extends AbstractModelConverter implements ModelConver
 
     public static boolean composedModelPropertiesAsSibling = System.getProperty(SET_PROPERTY_OF_COMPOSED_MODEL_AS_SIBLING) != null;
 
+    private static final int SCHEMA_COMPONENT_PREFIX = "#/components/schemas/".length();
+
     /**
      * Allows all enums to be resolved as a reference to a scheme added to the components section.
      */
@@ -727,7 +729,7 @@ 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 +1309,10 @@ 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 (StringUtils.isNotBlank(innerModel.get$ref())) {
+            innerModel = context.getDefinedModels().get(innerModel.get$ref().substring(SCHEMA_COMPONENT_PREFIX));
+        }
         if (StringUtils.isBlank(suffix) && StringUtils.isBlank(prefix)) {
             if (innerModel.getProperties() != null) {
                 props.addAll(innerModel.getProperties().values());
@@ -2278,7 +2283,7 @@ protected void resolveDiscriminatorProperty(JavaType type, ModelConverterContext
             if (StringUtils.isNotBlank(typeInfoProp)) {
                 Schema modelToUpdate = model;
                 if (StringUtils.isNotBlank(model.get$ref())) {
-                    modelToUpdate = context.getDefinedModels().get(model.get$ref().substring(21));
+                    modelToUpdate = context.getDefinedModels().get(model.get$ref().substring(SCHEMA_COMPONENT_PREFIX));
                 }
                 if (modelToUpdate.getProperties() == null || !modelToUpdate.getProperties().keySet().contains(typeInfoProp)) {
                     Schema discriminatorSchema = new StringSchema().name(typeInfoProp);