From 57324ee0b6cb58ff038f0d6f092b2c203d8382ad Mon Sep 17 00:00:00 2001
From: Carmine DiMascio <cdimasci@amazon.com>
Date: Fri, 1 Jan 2021 23:13:03 -0500
Subject: [PATCH] fix: preprocessor fails if it cannot dereference a path. skip
 it.

---
 src/middlewares/parsers/schema.preprocessor.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/middlewares/parsers/schema.preprocessor.ts b/src/middlewares/parsers/schema.preprocessor.ts
index 0ce96c5b..e0f4a11b 100644
--- a/src/middlewares/parsers/schema.preprocessor.ts
+++ b/src/middlewares/parsers/schema.preprocessor.ts
@@ -171,6 +171,12 @@ export class SchemaPreprocessor {
     const recurse = (parent, node, opts: TraversalStates) => {
       const schema = this.resolveSchema<SchemaObject>(node.schema);
 
+      if (!schema) {
+        // if we can't resolve the schema, skip it
+        // TODO fix me - must resolve $refs like, etc
+        // #/paths/~1subscription/get/requestBody/content/application~1json/schema/properties/subscription
+        return;
+      }
       // Save the original schema so we can check if it was a $ref
       (<any>opts).req.originalSchema = node.schema;
       (<any>opts).res.originalSchema = node.schema;