Merge branch 'tc-remove-nonexisting-namespace-pending-delete-projects' into 'master'

Add migration to remove pending delete projects with non-existing namespace

Closes #36541

See merge request !13598

5 files changed, 107 insertions, 1 deletions

diff --git a/app/workers/namespaceless_project_destroy_worker.rb b/app/workers/namespaceless_project_destroy_worker.rb
index a9073742ff7..1cfb0be759e 100644
--- a/app/workers/namespaceless_project_destroy_worker.rb
+++ b/app/workers/namespaceless_project_destroy_worker.rb
@@ -18,7 +18,8 @@ class NamespacelessProjectDestroyWorker
     rescue ActiveRecord::RecordNotFound
       return
     end
-    return unless project.namespace_id.nil?  # Reject doing anything for projects that *do* have a namespace
+
+    return if project.namespace  # Reject doing anything for projects that *do* have a namespace
 
     project.team.truncate
 
diff --git a/changelogs/unreleased/tc-remove-nonexisting-namespace-pending-delete-projects.yml b/changelogs/unreleased/tc-remove-nonexisting-namespace-pending-delete-projects.yml
new file mode 100644
index 00000000000..218336df5d2
--- /dev/null
+++ b/changelogs/unreleased/tc-remove-nonexisting-namespace-pending-delete-projects.yml
@@ -0,0 +1,5 @@
+---
+title: Migration to remove pending delete projects with non-existing namespace
+merge_request: 13598
+author:
+type: other
diff --git a/db/post_migrate/20170816102555_cleanup_nonexisting_namespace_pending_delete_projects.rb b/db/post_migrate/20170816102555_cleanup_nonexisting_namespace_pending_delete_projects.rb
new file mode 100644
index 00000000000..3f085c17133
--- /dev/null
+++ b/db/post_migrate/20170816102555_cleanup_nonexisting_namespace_pending_delete_projects.rb
@@ -0,0 +1,54 @@
+# Follow up of CleanupNamespacelessPendingDeleteProjects and it cleans
+# all projects with `pending_delete = true` and for which the
+# namespace no longer exists.
+class CleanupNonexistingNamespacePendingDeleteProjects < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  class Project < ActiveRecord::Base
+    self.table_name = 'projects'
+
+    include ::EachBatch
+  end
+
+  class Namespace < ActiveRecord::Base
+    self.table_name = 'namespaces'
+  end
+
+  def up
+    find_projects.each_batch do |batch|
+      args = batch.pluck(:id).map { |id| [id] }
+
+      NamespacelessProjectDestroyWorker.bulk_perform_async(args)
+    end
+  end
+
+  def down
+    # NOOP
+  end
+
+  private
+
+  def find_projects
+    projects = Project.arel_table
+    namespaces = Namespace.arel_table
+
+    namespace_query = namespaces.project(1)
+                        .where(namespaces[:id].eq(projects[:namespace_id]))
+                        .exists.not
+
+    # SELECT "projects"."id"
+    # FROM "projects"
+    # WHERE "projects"."pending_delete" = 't'
+    #   AND (NOT (EXISTS
+    #               (SELECT 1
+    #                FROM "namespaces"
+    #                WHERE "namespaces"."id" = "projects"."namespace_id")))
+    Project.where(projects[:pending_delete].eq(true))
+      .where(namespace_query)
+      .select(:id)
+  end
+end
diff --git a/spec/migrations/cleanup_nonexisting_namespace_pending_delete_projects_spec.rb b/spec/migrations/cleanup_nonexisting_namespace_pending_delete_projects_spec.rb
new file mode 100644
index 00000000000..7879105a334
--- /dev/null
+++ b/spec/migrations/cleanup_nonexisting_namespace_pending_delete_projects_spec.rb
@@ -0,0 +1,32 @@
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20170816102555_cleanup_nonexisting_namespace_pending_delete_projects.rb')
+
+describe CleanupNonexistingNamespacePendingDeleteProjects do
+  before do
+    # Stub after_save callbacks that will fail when Project has invalid namespace
+    allow_any_instance_of(Project).to receive(:ensure_storage_path_exist).and_return(nil)
+    allow_any_instance_of(Project).to receive(:update_project_statistics).and_return(nil)
+  end
+
+  describe '#up' do
+    set(:some_project) { create(:project) }
+
+    it 'only cleans up when namespace does not exist' do
+      create(:project, pending_delete: true)
+      project = build(:project, pending_delete: true, namespace: nil, namespace_id: Namespace.maximum(:id).to_i.succ)
+      project.save(validate: false)
+
+      expect(NamespacelessProjectDestroyWorker).to receive(:bulk_perform_async).with([[project.id]])
+
+      described_class.new.up
+    end
+
+    it 'does nothing when no pending delete projects without namespace found' do
+      create(:project, pending_delete: true, namespace: create(:namespace))
+
+      expect(NamespacelessProjectDestroyWorker).not_to receive(:bulk_perform_async)
+
+      described_class.new.up
+    end
+  end
+end
diff --git a/spec/workers/namespaceless_project_destroy_worker_spec.rb b/spec/workers/namespaceless_project_destroy_worker_spec.rb
index 817e103fd9a..20cf580af8a 100644
--- a/spec/workers/namespaceless_project_destroy_worker_spec.rb
+++ b/spec/workers/namespaceless_project_destroy_worker_spec.rb
@@ -75,5 +75,19 @@ describe NamespacelessProjectDestroyWorker do
         end
       end
     end
+
+    context 'project has non-existing namespace' do
+      let!(:project) do
+        project = build(:project, namespace_id: Namespace.maximum(:id).to_i.succ)
+        project.save(validate: false)
+        project
+      end
+
+      it 'deletes the project' do
+        subject.perform(project.id)
+
+        expect(Project.unscoped.all).not_to include(project)
+      end
+    end
   end
 end