From c107ca393095a1a45c6a55afc513b02ce70b119e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kamil=20My=C5=9Bliwiec?= <mail@kamilmysliwiec.com>
Date: Thu, 21 Oct 2021 16:05:35 +0200
Subject: [PATCH] fix(): fallback to the original behavior when no aliases

---
 lib/swagger-explorer.ts | 41 +++++++++++++++++++++++++++++------------
 1 file changed, 29 insertions(+), 12 deletions(-)

diff --git a/lib/swagger-explorer.ts b/lib/swagger-explorer.ts
index b91ec5031..3706e5c4a 100644
--- a/lib/swagger-explorer.ts
+++ b/lib/swagger-explorer.ts
@@ -183,16 +183,33 @@ export class SwaggerExplorer {
         }, {})
       );
 
-      return methodMetadata.root.map((endpointMetadata: DenormalizedDoc) => {
-        endpointMetadata = {
-          ...methodMetadata,
-          root: endpointMetadata as any
-        };
-        const mergedMethodMetadata = this.mergeMetadata(
-          globalMetadata,
-          omitBy(endpointMetadata, isEmpty)
-        );
-        return this.migrateOperationSchema(
+      if (Array.isArray(methodMetadata.root)) {
+        return methodMetadata.root.map((endpointMetadata: DenormalizedDoc) => {
+          endpointMetadata = {
+            ...methodMetadata,
+            root: endpointMetadata as any
+          };
+          const mergedMethodMetadata = this.mergeMetadata(
+            globalMetadata,
+            omitBy(endpointMetadata, isEmpty)
+          );
+          return this.migrateOperationSchema(
+            {
+              responses: {},
+              ...omit(globalMetadata, 'chunks'),
+              ...mergedMethodMetadata
+            },
+            prototype,
+            targetCallback
+          );
+        });
+      }
+      const mergedMethodMetadata = this.mergeMetadata(
+        globalMetadata,
+        omitBy(methodMetadata, isEmpty)
+      );
+      return [
+        this.migrateOperationSchema(
           {
             responses: {},
             ...omit(globalMetadata, 'chunks'),
@@ -200,8 +217,8 @@ export class SwaggerExplorer {
           },
           prototype,
           targetCallback
-        );
-      });
+        )
+      ];
     });
 
     return flatten(denormalizedPaths).filter((path) => path.root?.path);