From 3c6de2cafceb8329a19444c034e15d70921b1dd1 Mon Sep 17 00:00:00 2001
From: Roman Hotsiy <gotsijroman@gmail.com>
Date: Tue, 29 May 2018 17:58:56 +0300
Subject: [PATCH] fix: more descriptive message for wrong discriminator use

fixes #505
---
 src/components/Schema/Schema.tsx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/components/Schema/Schema.tsx b/src/components/Schema/Schema.tsx
index 1be8d4cb11..d875071029 100644
--- a/src/components/Schema/Schema.tsx
+++ b/src/components/Schema/Schema.tsx
@@ -40,6 +40,13 @@ export class Schema extends React.Component<Partial<SchemaProps>> {
     }
 
     if (discriminatorProp !== undefined) {
+      if (!oneOf || !oneOf.length) {
+        throw new Error(
+          `Looks like you are using discriminator wrong: you don't have any definition inherited from the ${
+            schema.title
+          }`,
+        );
+      }
       return (
         <ObjectSchema
           {...{ ...this.props, schema: oneOf![schema.activeOneOf] }}