gitlab-org--gitlab-foss/spec/services/projects/destroy_service_spec.rb
Yorick Peterse ac382b5682
Use CTEs for nested groups and authorizations
This commit introduces the usage of Common Table Expressions (CTEs) to
efficiently retrieve nested group hierarchies, without having to rely on
the "routes" table (which is an _incredibly_ inefficient way of getting
the data). This requires a patch to ActiveRecord (found in the added
initializer) to work properly as ActiveRecord doesn't support WITH
statements properly out of the box.

Unfortunately MySQL provides no efficient way of getting nested groups.
For example, the old routes setup could easily take 5-10 seconds
depending on the amount of "routes" in a database. Providing vastly
different logic for both MySQL and PostgreSQL will negatively impact the
development process. Because of this the various nested groups related
methods return empty relations when used in combination with MySQL.

For project authorizations the logic is split up into two classes:

* Gitlab::ProjectAuthorizations::WithNestedGroups
* Gitlab::ProjectAuthorizations::WithoutNestedGroups

Both classes get the fresh project authorizations (= as they should be
in the "project_authorizations" table), including nested groups if
PostgreSQL is used. The logic of these two classes is quite different
apart from their public interface. This complicates development a bit,
but unfortunately there is no way around this.

This commit also introduces Gitlab::GroupHierarchy. This class can be
used to get the ancestors and descendants of a base relation, or both by
using a UNION. This in turn is used by methods such as:

* Namespace#ancestors
* Namespace#descendants
* User#all_expanded_groups

Again this class relies on CTEs and thus only works on PostgreSQL. The
Namespace methods will return an empty relation when MySQL is used,
while User#all_expanded_groups will return only the groups a user is a
direct member of.

Performance wise the impact is quite large. For example, on GitLab.com
Namespace#descendants used to take around 580 ms to retrieve data for a
particular user. Using CTEs we are able to reduce this down to roughly 1
millisecond, returning the exact same data.

== On The Fly Refreshing

Refreshing of authorizations on the fly (= when
users.authorized_projects_populated was not set) is removed with this
commit. This simplifies the code, and ensures any queries used for
authorizations are not mutated because they are executed in a Rails
scope (e.g. Project.visible_to_user).

This commit includes a migration to schedule refreshing authorizations
for all users, ensuring all of them have their authorizations in place.
Said migration schedules users in batches of 5000, with 5 minutes
between every batch to smear the load around a bit.

== Spec Changes

This commit also introduces some changes to various specs. For example,
some specs for ProjectTeam assumed that creating a personal project
would _not_ lead to the owner having access, which is incorrect. Because
we also no longer refresh authorizations on the fly for new users some
code had to be added to the "empty_project" factory. This chunk of code
ensures that the owner's permissions are refreshed after creating the
project, something that is normally done in Projects::CreateService.
2017-05-17 16:51:08 +02:00

161 lines
4.9 KiB
Ruby

require 'spec_helper'
describe Projects::DestroyService, services: true do
let!(:user) { create(:user) }
let!(:project) { create(:project, :repository, namespace: user.namespace) }
let!(:path) { project.repository.path_to_repo }
let!(:remove_path) { path.sub(/\.git\Z/, "+#{project.id}+deleted.git") }
let!(:async) { false } # execute or async_execute
before do
stub_container_registry_config(enabled: true)
stub_container_registry_tags(repository: :any, tags: [])
end
shared_examples 'deleting the project' do
it 'deletes the project' do
expect(Project.unscoped.all).not_to include(project)
expect(Dir.exist?(path)).to be_falsey
expect(Dir.exist?(remove_path)).to be_falsey
end
end
shared_examples 'deleting the project with pipeline and build' do
context 'with pipeline and build' do # which has optimistic locking
let!(:pipeline) { create(:ci_pipeline, project: project) }
let!(:build) { create(:ci_build, :artifacts, pipeline: pipeline) }
before do
perform_enqueued_jobs do
destroy_project(project, user, {})
end
end
it_behaves_like 'deleting the project'
end
end
context 'Sidekiq inline' do
before do
# Run sidekiq immediatly to check that renamed repository will be removed
Sidekiq::Testing.inline! { destroy_project(project, user, {}) }
end
it_behaves_like 'deleting the project'
end
context 'Sidekiq fake' do
before do
# Dont run sidekiq to check if renamed repository exists
Sidekiq::Testing.fake! { destroy_project(project, user, {}) }
end
it { expect(Project.all).not_to include(project) }
it { expect(Dir.exist?(path)).to be_falsey }
it { expect(Dir.exist?(remove_path)).to be_truthy }
end
context 'when flushing caches fail' do
before do
new_user = create(:user)
project.team.add_user(new_user, Gitlab::Access::DEVELOPER)
allow_any_instance_of(Projects::DestroyService).to receive(:flush_caches).and_raise(Redis::CannotConnectError)
end
it 'keeps project team intact upon an error' do
Sidekiq::Testing.inline! do
begin
destroy_project(project, user, {})
rescue Redis::CannotConnectError
end
end
expect(project.team.members.count).to eq 2
end
end
context 'with async_execute' do
let(:async) { true }
context 'async delete of project with private issue visibility' do
before do
project.project_feature.update_attribute("issues_access_level", ProjectFeature::PRIVATE)
# Run sidekiq immediately to check that renamed repository will be removed
Sidekiq::Testing.inline! { destroy_project(project, user, {}) }
end
it_behaves_like 'deleting the project'
end
it_behaves_like 'deleting the project with pipeline and build'
end
context 'with execute' do
it_behaves_like 'deleting the project with pipeline and build'
end
describe 'container registry' do
context 'when there are regular container repositories' do
let(:container_repository) { create(:container_repository) }
before do
stub_container_registry_tags(repository: project.full_path + '/image',
tags: ['tag'])
project.container_repositories << container_repository
end
context 'when image repository deletion succeeds' do
it 'removes tags' do
expect_any_instance_of(ContainerRepository)
.to receive(:delete_tags!).and_return(true)
destroy_project(project, user)
end
end
context 'when image repository deletion fails' do
it 'raises an exception' do
expect_any_instance_of(ContainerRepository)
.to receive(:delete_tags!).and_return(false)
expect{ destroy_project(project, user) }
.to raise_error(ActiveRecord::RecordNotDestroyed)
end
end
end
context 'when there are tags for legacy root repository' do
before do
stub_container_registry_tags(repository: project.full_path,
tags: ['tag'])
end
context 'when image repository tags deletion succeeds' do
it 'removes tags' do
expect_any_instance_of(ContainerRepository)
.to receive(:delete_tags!).and_return(true)
destroy_project(project, user)
end
end
context 'when image repository tags deletion fails' do
it 'raises an exception' do
expect_any_instance_of(ContainerRepository)
.to receive(:delete_tags!).and_return(false)
expect { destroy_project(project, user) }
.to raise_error(Projects::DestroyService::DestroyError)
end
end
end
end
def destroy_project(project, user, params = {})
if async
Projects::DestroyService.new(project, user, params).async_execute
else
Projects::DestroyService.new(project, user, params).execute
end
end
end