Fix for next version of template scaffolder for the steps without properties

Signed-off-by: bnechyporenko <bnechyporenko@bol.com>

.changeset/olive-berries-poke.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-react': major
+---
+
+Fix for next version of template scaffolder for the steps without properties

plugins/scaffolder-react/src/next/hooks/useTemplateSchema.test.tsx

@@ -232,5 +232,39 @@ describe('useTemplateSchema', () => {
         },
       });
     });
+
+    it('should deal with steps having no properties', () => {
+      const manifest: TemplateParameterSchema = {
+        title: 'Test Template',
+        description: 'Test Template Description',
+        steps: [
+          {
+            title: 'About step',
+            description:
+              'The first step giving the initial information about the template',
+            schema: {
+              type: 'object',
+            },
+          },
+        ],
+      };
+
+      const { result } = renderHook(() => useTemplateSchema(manifest), {
+        wrapper: ({ children }) => (
+          <TestApiProvider
+            apis={[[featureFlagsApiRef, { isActive: () => false }]]}
+          >
+            {children}
+          </TestApiProvider>
+        ),
+      });
+
+      const [first] = result.current.steps;
+
+      expect(first.schema).toEqual({
+        type: 'object',
+        properties: {},
+      });
+    });
   });
 });

plugins/scaffolder-react/src/next/hooks/useTemplateSchema.ts

@@ -62,7 +62,7 @@ export const useTemplateSchema = (
         // Title is rendered at the top of the page, so let's ignore this from jsonschemaform
         title: undefined,
         properties: Object.fromEntries(
-          Object.entries(step.schema.properties as JsonObject).filter(
+          Object.entries((step.schema.properties || []) as JsonObject).filter(
             ([key]) => {
               const stepFeatureFlag =
                 step.uiSchema[key]?.['ui:backstage']?.featureFlag;