fixed error without contributors

scm-ui/ui-components/src/repos/changesets/ChangesetAuthor.tsx

@@ -128,6 +128,8 @@ const Contributors: FC<PersonsProps> = ({ persons, label, displayTextOnly }) =>
   }
 };
 
+const emptyListOfContributors: Person[] = [];
+
 const ChangesetAuthor: FC<Props> = ({ changeset }) => {
   const binder = useBinder();
 
@@ -140,7 +142,10 @@ const ChangesetAuthor: FC<Props> = ({ changeset }) => {
   };
 
   const filterContributorsByType = (type: string) => {
+    if (changeset.contributors) {
       return changeset.contributors.filter(p => p.type === type).map(contributor => contributor.person);
+    }
+    return emptyListOfContributors;
   };
 
   const authorLine = [];

scm-ui/ui-types/src/Changesets.ts

@@ -36,7 +36,7 @@ export type Changeset = Collection & {
   date: Date;
   author: Person;
   description: string;
-  contributors: Contributor[];
+  contributors?: Contributor[];
   _links: Links;
   _embedded: {
     tags?: Tag[];

scm-ui/ui-webapp/src/repos/components/changesets/ChangesetDetails.tsx

@@ -66,7 +66,10 @@ const BottomMarginLevel = styled(Level)`
 `;
 
 const countContributors = (changeset: Changeset) => {
+  if (changeset.contributors) {
     return changeset.contributors.length + 1;
+  }
+  return 1;
 };
 
 const ContributorLine = styled.div`