React admin custom toolbar with redirect

custom-toolbar.tsx

// add a custom toolbar prop to both CommentEdit and CommentCreate
// don't use redirect prop!
      <SimpleForm toolbar={<CommentFormToolbar/>}>


// defined as
const CommentFormToolbar: VFC<ToolbarProps> = (props) => {
  const { post_id } = useRecordContext();

  return (
    <Toolbar {...props}>
      <SaveButton redirect={`/posts/${post_id }/show`} />
      <DeleteButton redirect={`/posts/${post_id }/show`} />
    </Toolbar>
  );
};