Apply GroupUrlConstrainer to all routes with group IDs

config/routes/group.rb

@@ -2,7 +2,8 @@ require 'constraints/group_url_constrainer'
 
 resources :groups, only: [:index, :new, :create]
 
-scope(path: 'groups/*id',
+constraints(GroupUrlConstrainer.new) do
+  scope(path: 'groups/*id',
         controller: :groups,
         constraints: { id: Gitlab::PathRegex.full_namespace_route_regex, format: /(html|json|atom)/ }) do
     get :edit, as: :edit_group
@@ -12,9 +13,9 @@ scope(path: 'groups/*id',
     get :activity, as: :activity_group
     get :subgroups, as: :subgroups_group
     get '/', action: :show, as: :group_canonical
-end
+  end
 
-scope(path: 'groups/*group_id',
+  scope(path: 'groups/*group_id',
         module: :groups,
         as: :group,
         constraints: { group_id: Gitlab::PathRegex.full_namespace_route_regex }) do
@@ -82,7 +83,6 @@ scope(path: 'groups/*group_id',
     get :boards, to: redirect('/groups/%{group_id}/-/boards')
 end
 
-constraints(GroupUrlConstrainer.new) do
   scope(path: '*id',
         as: :group,
         constraints: { id: Gitlab::PathRegex.full_namespace_route_regex, format: /(html|json|atom)/ },