Merge pull request #19466 from weityang/fix-cannot-convert-undefined-or-null-to-object-error

fix[core-components] Fix cannot convert undefined or null to object error

.changeset/eighty-fans-provide.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core-components': patch
+---
+
+Fixed an issue causing `StructuredMetadataTable` to crash in case metadata contained `null` values.

packages/core-components/src/components/StructuredMetadataTable/StructuredMetadataTable.test.tsx

@@ -21,7 +21,7 @@ import { StructuredMetadataTable } from './StructuredMetadataTable';
 
 describe('<StructuredMetadataTable />', () => {
   it('renders without exploding', () => {
-    const metadata = { hello: 'world' };
+    const metadata = { hello: 'world', foo: null };
     const { getByText } = render(
       <StructuredMetadataTable metadata={metadata} />,
     );

packages/core-components/src/components/StructuredMetadataTable/StructuredMetadataTable.tsx

@@ -113,7 +113,7 @@ function toValue(
     return <Fragment>{value}</Fragment>;
   }
 
-  if (typeof value === 'object' && !Array.isArray(value)) {
+  if (value !== null && typeof value === 'object' && !Array.isArray(value)) {
     return renderMap(value, options, nested);
   }