fixes refetching loop for non existing changesets

CHANGELOG.md

@@ -21,6 +21,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Close file lists in migration ([#1191](https://github.com/scm-manager/scm-manager/pull/1191))
 - Use command in javahg.py from registrar (Upgrade to newer javahg version)  ([#1192](https://github.com/scm-manager/scm-manager/pull/1192))
 - Fixed wrong e-tag format ([sdorra/web-resource #1](https://github.com/sdorra/web-resources/pull/1))
+- Fixed refetching loop for non existing changesets
 
 ## [2.0.0] - 2020-06-04
 ### Added

scm-ui/ui-webapp/src/repos/containers/ChangesetView.tsx

@@ -48,16 +48,16 @@ type Props = WithTranslation & {
 
 class ChangesetView extends React.Component<Props> {
   componentDidMount() {
-    const { fetchChangesetIfNeeded, repository } = this.props;
-    const id = this.props.match.params.id;
+    const { fetchChangesetIfNeeded, repository, id } = this.props;
     fetchChangesetIfNeeded(repository, id);
   }
 
-  componentDidUpdate() {
-    const { fetchChangesetIfNeeded, repository } = this.props;
-    const id = this.props.match.params.id;
+  componentDidUpdate(prevProps: Props) {
+    const { fetchChangesetIfNeeded, repository, id } = this.props;
+    if (prevProps.id !== id) {
       fetchChangesetIfNeeded(repository, id);
     }
+  }
 
   render() {
     const { changeset, loading, error, t, repository } = this.props;
@@ -79,6 +79,7 @@ const mapStateToProps = (state: any, ownProps: Props) => {
   const loading = isFetchChangesetPending(state, repository, id);
   const error = getFetchChangesetFailure(state, repository, id);
   return {
+    id,
     changeset,
     error,
     loading