Merge branch '35072-fix-pages-delete' into 'master'

Resolve "Deleting of a GitLab Pages project results in "`PagesWorker.perform_in` cannot be called inside a transaction""

Closes #35072

See merge request !13631

app/models/project.rb

@@ -60,7 +60,7 @@ class Project < ActiveRecord::Base
   end
 
   before_destroy :remove_private_deploy_keys
-  after_destroy :remove_pages
+  after_destroy -> { run_after_commit { remove_pages } }
 
   # update visibility_level of forks
   after_update :update_forks_visibility_level
@@ -1224,6 +1224,9 @@ class Project < ActiveRecord::Base
 
   # TODO: what to do here when not using Legacy Storage? Do we still need to rename and delay removal?
   def remove_pages
+    # Projects with a missing namespace cannot have their pages removed
+    return unless namespace
+
     ::Projects::UpdatePagesConfigurationService.new(self).execute
 
     # 1. We rename pages to temporary directory

app/workers/namespaceless_project_destroy_worker.rb

@@ -24,10 +24,6 @@ class NamespacelessProjectDestroyWorker
 
     unlink_fork(project) if project.forked?
 
-    # Override Project#remove_pages for this instance so it doesn't do anything
-    def project.remove_pages
-    end
-
     project.destroy!
   end
 

changelogs/unreleased/35072-fix-pages-delete.yml

+---
+title: Fix deleting GitLab Pages files when a project is removed
+merge_request: 13631
+author:
+type: fixed

spec/models/project_spec.rb

@@ -2311,6 +2311,44 @@ describe Project do
     end
   end
 
+  describe '#remove_pages' do
+    let(:project) { create(:project) }
+    let(:namespace) { project.namespace }
+    let(:pages_path) { project.pages_path }
+
+    around do |example|
+      FileUtils.mkdir_p(pages_path)
+      begin
+        example.run
+      ensure
+        FileUtils.rm_rf(pages_path)
+      end
+    end
+
+    it 'removes the pages directory' do
+      expect_any_instance_of(Projects::UpdatePagesConfigurationService).to receive(:execute)
+      expect_any_instance_of(Gitlab::PagesTransfer).to receive(:rename_project).and_return(true)
+      expect(PagesWorker).to receive(:perform_in).with(5.minutes, :remove, namespace.full_path, anything)
+
+      project.remove_pages
+    end
+
+    it 'is a no-op when there is no namespace' do
+      project.update_column(:namespace_id, nil)
+
+      expect_any_instance_of(Projects::UpdatePagesConfigurationService).not_to receive(:execute)
+      expect_any_instance_of(Gitlab::PagesTransfer).not_to receive(:rename_project)
+
+      project.remove_pages
+    end
+
+    it 'is run when the project is destroyed' do
+      expect(project).to receive(:remove_pages).and_call_original
+
+      project.destroy
+    end
+  end
+
   describe '#forks_count' do
     it 'returns the number of forks' do
       project = build(:project)