Reduce queries on group search API for blobs scope [RUN ALL RSPEC] [RUN AS-IF-FOSS]

ee/changelogs/unreleased/326754-api-endpoint-groups-id-search-blobs-scope-executes-more-than-10.yml

+---
+title: Reduce queries on group search API for blobs scope
+merge_request: 58495
+author:
+type: performance

ee/lib/ee/api/search.rb

@@ -11,6 +11,11 @@ module EE
 
           ELASTICSEARCH_SCOPES = %w(wiki_blobs blobs commits notes).freeze
 
+          override :scope_preload_method
+          def scope_preload_method
+            super.merge(blobs: :with_api_commit_entity_associations).freeze
+          end
+
           override :verify_search_scope!
           def verify_search_scope!(resource:)
             if ELASTICSEARCH_SCOPES.include?(params[:scope]) && !use_elasticsearch?(resource)

ee/spec/requests/api/search_spec.rb

@@ -134,27 +134,52 @@ RSpec.describe API::Search, factory_default: :keep do
         it 'avoids N+1 queries' do
           control = ActiveRecord::QueryRecorder.new { get api(endpoint, user), params: { scope: 'commits', search: 'folder' } }
 
-          project_2 = create(:project, :public, :repository, :wiki_repo, name: 'awesome project 2')
-          project_3 = create(:project, :public, :repository, :wiki_repo, name: 'awesome project 3')
+          project_2 = create(:project, :public, :repository, :wiki_repo, group: group, name: 'awesome project 2')
           project_2.repository.index_commits_and_blobs
-          project_3.repository.index_commits_and_blobs
+          3.times do |i|
+            commit_sha = project.repository.create_file(user, "#{i}", "folder #{i}", message: "committing folder #{i}", branch_name: 'master')
+            project.repository.commit(commit_sha)
+          end
+          project.repository.index_commits_and_blobs
 
           ensure_elasticsearch_index!
 
-          # Some N+1 queries still exist
-          expect { get api(endpoint, user), params: { scope: 'commits', search: 'folder' } }.not_to exceed_query_limit(control).with_threshold(9)
+          # N+1 queries still exist (ci_pipelines)
+          expect { get api(endpoint, user), params: { scope: 'commits', search: 'folder' } }.not_to exceed_query_limit(control).with_threshold(5)
+          # support global, group, and project search results expected counts
+          expected_count = level == :project ? 5 : 7
+          expect(json_response.count).to be expected_count
         end
       end
 
       context 'for blobs scope' do
         it_behaves_like 'response is correct', schema: 'public_api/v4/blobs' do
           before do
-            get api(endpoint, user), params: { scope: 'blobs', search: 'monitors' }
+            get api(endpoint, user), params: { scope: 'blobs', search: 'folder' }
           end
         end
 
         it_behaves_like 'pagination', scope: 'blobs'
 
+        it 'avoids N+1 queries' do
+          control = ActiveRecord::QueryRecorder.new { get api(endpoint, user), params: { scope: 'blobs', search: 'Issue team' } }
+
+          project_2 = create(:project, :public, :repository, :wiki_repo, group: group, name: 'awesome project 2')
+          project_2.repository.index_commits_and_blobs
+          3.times do |i|
+            commit_sha = project.repository.create_file(user, "#{i}", "Issue team #{i}", message: "#{i}", branch_name: 'master')
+            project.repository.commit(commit_sha)
+          end
+
+          project.repository.index_commits_and_blobs
+          ensure_elasticsearch_index!
+
+          expect { get api(endpoint, user), params: { scope: 'blobs', search: 'Issue team' } }.not_to exceed_query_limit(control)
+          # support global, group, and project search results expected counts
+          expected_count = level == :project ? 6 : 9
+          expect(json_response.count).to be expected_count
+        end
+
         context 'filters' do
           def results_filenames
             json_response.map { |h| h['filename'] }.compact

lib/api/search.rb

@@ -22,13 +22,15 @@ module API
         users: Entities::UserBasic
       }.freeze
 
-      SCOPE_PRELOAD_METHOD = {
-        merge_requests: :with_api_entity_associations,
-        projects: :with_api_entity_associations,
-        issues: :with_api_entity_associations,
-        milestones: :with_api_entity_associations,
-        commits: :with_api_commit_entity_associations
-      }.freeze
+      def scope_preload_method
+        {
+          merge_requests: :with_api_entity_associations,
+          projects: :with_api_entity_associations,
+          issues: :with_api_entity_associations,
+          milestones: :with_api_entity_associations,
+          commits: :with_api_commit_entity_associations
+        }.freeze
+      end
 
       def search(additional_params = {})
         search_params = {
@@ -60,7 +62,7 @@ module API
       end
 
       def preload_method
-        SCOPE_PRELOAD_METHOD[params[:scope].to_sym]
+        scope_preload_method[params[:scope].to_sym]
       end
 
       def verify_search_scope!(resource:)