Obeyed Till one last time.

app/assets/javascripts/angular/work_packages/tabs/attachment-user-cell-directive.js

@@ -36,12 +36,11 @@ angular.module('openproject.workPackages.directives')
       attachment: '='
     },
     link: function(scope, element, attributes) {
-      scope.userPath = PathHelper.staticUserPath;
-
       scope.attachment.links.author.fetch()
         .then(function(author){
           scope.authorName = author.props.name;
           scope.authorId = author.props.id;
+          scope.userPath = PathHelper.staticUserPath(author.props.id);
         });
     }
   };

app/assets/javascripts/angular/work_packages/tabs/attachments-table-directive.js

@@ -34,8 +34,6 @@ angular.module('openproject.workPackages.directives')
     templateUrl: '/templates/work_packages/tabs/_attachments_table.html',
     scope: {
       attachments: '='
-    },
-    link: function(scope, element, attributes) {
     }
   };
 }]);

public/templates/work_packages/tabs/_attachment_user_cell.html

@@ -1 +1 @@
-<a ng-href="{{ userPath(authorId) }}" ng-bind="authorName"></a>
+<a ng-href="{{ userPath }}" ng-bind="authorName"></a>