Show statistics also when repository is disabled

app/policies/project_policy.rb

@@ -187,6 +187,7 @@ class ProjectPolicy < BasePolicy
 
   rule { can?(:reporter_access) }.policy do
     enable :download_code
+    enable :read_statistics
     enable :download_wiki_code
     enable :fork_project
     enable :create_project_snippet

changelogs/unreleased/fix-hidden-statistics.yml

+---
+title: Show statistics also when repository is disabled
+merge_request: 26509
+author: Peter Marko
+type: fixed

lib/api/entities.rb

@@ -275,7 +275,7 @@ module API
       expose :printing_merge_request_link_enabled
       expose :merge_method
       expose :statistics, using: 'API::Entities::ProjectStatistics', if: -> (project, options) {
-        options[:statistics] && Ability.allowed?(options[:current_user], :download_code, project)
+        options[:statistics] && Ability.allowed?(options[:current_user], :read_statistics, project)
       }
 
       # rubocop: disable CodeReuse/ActiveRecord

spec/requests/api/projects_spec.rb

@@ -1183,6 +1183,16 @@ describe API::Projects do
           expect(response).to have_gitlab_http_status(200)
           expect(json_response).to include 'statistics'
         end
+
+        it "includes statistics also when repository is disabled" do
+          project.add_developer(user)
+          project.project_feature.update_attribute(:repository_access_level, ProjectFeature::DISABLED)
+
+          get api("/projects/#{project.id}", user), params: { statistics: true }
+
+          expect(response).to have_gitlab_http_status(200)
+          expect(json_response).to include 'statistics'
+        end
       end
 
       it "includes import_error if user can admin project" do