consider __typename property of plain javascript objects for type

nestjs · Apr 16, 2021 · 8d9f530 · 8d9f530
1 parent 1938103
commit 8d9f530
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/lib/schema-builder/factories/interface-definition.factory.ts b/lib/schema-builder/factories/interface-definition.factory.ts
@@ -87,6 +87,9 @@ export class InterfaceDefinitionFactory {
             (Type) => instance instanceof Type,
           );
           if (!target) {
+            if (Reflect.has(instance, '__typename')) {
+              return instance.__typename;
+            }
             throw new ReturnTypeCannotBeResolvedError(metadata.name);
           }
           return this.typeDefinitionsStorage.getObjectTypeByTarget(target).type;