fix undefined property error

* ref: cern-sis/issues-inspire#424
inveniosoftware-contrib · Jan 23, 2024 · 9f6f0ab · 9f6f0ab
1 parent 31ef771
commit 9f6f0ab
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/shared/services/compare-keys-by-schema.service.ts b/src/shared/services/compare-keys-by-schema.service.ts
@@ -34,8 +34,8 @@ export class CompareKeysBySchemaService {
    */
   compare(key1: string, key2: string, schema: JSONSchema): number {
     // Sort by priority, larger is the first.
-    const priorty1 = schema.properties[key1].priority || 0;
-    const priority2 = schema.properties[key2].priority || 0;
+    const priorty1 = schema?.properties[key1]?.priority || 0;
+    const priority2 = schema?.properties[key2]?.priority || 0;
 
     if (priorty1 > priority2) { return -1; }
     if (priorty1 < priority2) { return 1; }