Merge remote-tracking branch 'upstream/master' into no-ivar-in-modules

* upstream/master: (671 commits)
  Make rubocop happy
  Use guard clause
  Improve language
  Prettify
  Use temp branch
  Pass info about who started the job and which job triggered it
  Docs: add indexes for monitoring and performance monitoring
  clearer-documentation-on-inline-diffs
  Add docs for commit diff discussion in merge requests
  sorting for tags api
  Clear BatchLoader after each spec to prevent holding onto records longer than necessary
  Include project in BatchLoader key to prevent returning blobs for the wrong project
  moved lfs_blob_ids method into ExtractsPath module
  Converted JS modules into exported modules
  spec fixes
  Bump gitlab-shell version to 5.10.3
  Clear caches before updating MR diffs
  Use new Ruby version 2.4 in GitLab QA images
  moved lfs blob fetch from extractspath file
  Update GitLab QA dependencies
  ...

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/api/helpers/pagination.rb b/lib/api/helpers/pagination.rb
index 95108292aac..bb70370ba77 100644
--- a/lib/api/helpers/pagination.rb
+++ b/lib/api/helpers/pagination.rb
@@ -2,6 +2,8 @@ module API
   module Helpers
     module Pagination
       def paginate(relation)
+        relation = add_default_order(relation)
+
         relation.page(params[:page]).per(params[:per_page]).tap do |data|
           add_pagination_headers(data)
         end
@@ -45,6 +47,14 @@ module API
         # Ensure there is in total at least 1 page
         [paginated_data.total_pages, 1].max
       end
+
+      def add_default_order(relation)
+        if relation.is_a?(ActiveRecord::Relation) && relation.order_values.empty?
+          relation = relation.order(:id)
+        end
+
+        relation
+      end
     end
   end
 end