Fix N+1 queries on milestone show pages

app/models/issue.rb

@@ -39,6 +39,8 @@ class Issue < ActiveRecord::Base
 
   scope :created_after, -> (datetime) { where("created_at >= ?", datetime) }
 
+  scope :include_associations, -> { includes(:assignee, :labels, project: :namespace) }
+
   attr_spammable :title, spam_title: true
   attr_spammable :description, spam_description: true
 

app/views/shared/milestones/_tabs.html.haml

@@ -21,7 +21,7 @@
 
 .tab-content.milestone-content
   .tab-pane.active#tab-issues
-    = render 'shared/milestones/issues_tab', issues: milestone.issues_visible_to_user(current_user), show_project_name: show_project_name, show_full_project_name: show_full_project_name
+    = render 'shared/milestones/issues_tab', issues: milestone.issues_visible_to_user(current_user).include_associations, show_project_name: show_project_name, show_full_project_name: show_full_project_name
   .tab-pane#tab-merge-requests
     = render 'shared/milestones/merge_requests_tab', merge_requests: milestone.merge_requests, show_project_name: show_project_name, show_full_project_name: show_full_project_name
   .tab-pane#tab-participants

changelogs/unreleased/jej-fix-n-1-queries-milestones-show.yml

+---
+title: Fix N+1 queries on milestone show pages
+merge_request: 8185
+author: