Keep nullability when inlining ref

ben-schreiber · ben-schreiber · commit e20946772425 · 2025-07-22T15:48:56.000+03:00
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/utils/ModelUtils.java
@@ -1410,7 +1410,12 @@ public static Schema unaliasSchema(OpenAPI openAPI,
                             schemaMappings);
                 }
             } else {
-                return unaliasSchema(openAPI, allSchemas.get(ModelUtils.getSimpleRef(schema.get$ref())), schemaMappings);
+                Schema unaliased = unaliasSchema(openAPI, allSchemas.get(ModelUtils.getSimpleRef(schema.get$ref())), schemaMappings);
+                // Preserve nullable property from the original schema reference
+                if (Boolean.TRUE.equals(schema.getNullable())) {
+                    unaliased.setNullable(true);
+                }
+                return unaliased;
             }
         }
         return schema;

Original file line number	Diff line number	Diff line change
`@@ -1410,7 +1410,12 @@ public static Schema unaliasSchema(OpenAPI openAPI,`
`1410`	`1410`	`schemaMappings);`
`1411`	`1411`	`}`
`1412`	`1412`	`} else {`
`1413`		`- return unaliasSchema(openAPI, allSchemas.get(ModelUtils.getSimpleRef(schema.get$ref())), schemaMappings);`
	`1413`	`+ Schema unaliased = unaliasSchema(openAPI, allSchemas.get(ModelUtils.getSimpleRef(schema.get$ref())), schemaMappings);`
	`1414`	`+ // Preserve nullable property from the original schema reference`
	`1415`	`+ if (Boolean.TRUE.equals(schema.getNullable())) {`
	`1416`	`+ unaliased.setNullable(true);`
	`1417`	`+ }`
	`1418`	`+ return unaliased;`
`1414`	`1419`	`}`
`1415`	`1420`	`}`
`1416`	`1421`	`return schema;`