Merge branch 'external-wiki-helper-speedup' into 'master'

speed up ExternalWikiService#get_project_wiki_path

## What does this MR do?

Speed up ExternalWikiHelper#get_project_wiki_path

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

See issue #19886 

## What are the relevant issue numbers?

#19886 

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5305

1 files changed, 2 insertions, 3 deletions

diff --git a/app/helpers/external_wiki_helper.rb b/app/helpers/external_wiki_helper.rb
index 1f3401f2906..defd87d6bbe 100644
--- a/app/helpers/external_wiki_helper.rb
+++ b/app/helpers/external_wiki_helper.rb
@@ -1,8 +1,7 @@
 module ExternalWikiHelper
   def get_project_wiki_path(project)
-    external_wiki_service = project.services.
-      find { |service| service.to_param == 'external_wiki' }
-    if external_wiki_service.present? && external_wiki_service.active?
+    external_wiki_service = project.external_wiki
+    if external_wiki_service
       external_wiki_service.properties['external_wiki_url']
     else
       namespace_project_wiki_path(project.namespace, project, :home)