gitlab-org--gitlab-foss/spec/services/notification_recipient_service_spec.rb
Sean McGivern 28e6af88aa Fix N+1 for notification recipients on private projects
If we don't call #to_a, we're relying on the members already being loaded from
elsewhere. Otherwise we'll do a separate query for each user:

    [1] pry(main)> Project.first.team.members.include?(User.first)
      Project Load (0.7ms)  SELECT  "projects".* FROM "projects"  ORDER BY "projects"."id" ASC LIMIT 1
      ↳ (pry):3
      User Load (1.8ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" ASC LIMIT 1
      ↳ (pry):3
      User Exists (0.6ms)  SELECT  1 AS one FROM "users" INNER JOIN "project_authorizations" ON "users"."id" = "project_authorizations"."user_id" WHERE "project_authorizations"."project_id" = $1 AND "users"."id" = $2 LIMIT 1  [["project_id", 1], ["id", 1]]
      ↳ (pry):3
    => true
    [2] pry(main)> Project.first.team.members.to_a.include?(User.first)
      Project Load (12.8ms)  SELECT  "projects".* FROM "projects"  ORDER BY "projects"."id" ASC LIMIT 1
      ↳ (pry):1
      User Load (9.6ms)  SELECT "users".* FROM "users" INNER JOIN "project_authorizations" ON "users"."id" = "project_authorizations"."user_id" WHERE "project_authorizations"."project_id" = $1  [["project_id", 1]]
      ↳ (pry):1
      User Load (0.6ms)  SELECT  "users".* FROM "users"  ORDER BY "users"."id" ASC LIMIT 1
      ↳ (pry):1
    => true
2018-10-04 14:28:15 +01:00

59 lines
1.7 KiB
Ruby

require 'spec_helper'
describe NotificationRecipientService do
let(:service) { described_class }
let(:assignee) { create(:user) }
let(:project) { create(:project, :public) }
let(:other_projects) { create_list(:project, 5, :public) }
describe '#build_new_note_recipients' do
let(:issue) { create(:issue, project: project, assignees: [assignee]) }
let(:note) { create(:note_on_issue, noteable: issue, project_id: issue.project_id) }
shared_examples 'no N+1 queries' do
it 'avoids N+1 queries', :request_store do
create_user
service.build_new_note_recipients(note)
control_count = ActiveRecord::QueryRecorder.new do
service.build_new_note_recipients(note)
end
create_user
expect { service.build_new_note_recipients(note) }.not_to exceed_query_limit(control_count)
end
end
context 'when there are multiple watchers' do
def create_user
watcher = create(:user)
create(:notification_setting, source: project, user: watcher, level: :watch)
other_projects.each do |other_project|
create(:notification_setting, source: other_project, user: watcher, level: :watch)
end
end
include_examples 'no N+1 queries'
end
context 'when there are multiple subscribers' do
def create_user
subscriber = create(:user)
issue.subscriptions.create(user: subscriber, project: project, subscribed: true)
end
include_examples 'no N+1 queries'
context 'when the project is private' do
before do
project.update!(visibility_level: Gitlab::VisibilityLevel::PRIVATE)
end
include_examples 'no N+1 queries'
end
end
end
end