Merge branch 'yorick/block-user-cross-db-query' into 'master'

Fix cross database transaction when blocking users

See merge request gitlab-org/gitlab!75195

app/models/user.rb

@@ -391,9 +391,11 @@ class User < ApplicationRecord
     # this state transition object in order to do a rollback.
     # For this reason the tradeoff is to disable this cop.
     after_transition any => :blocked do |user|
+      user.run_after_commit do
         Ci::DropPipelineService.new.execute_async_for_all(user.pipelines, :user_blocked, user)
         Ci::DisableUserPipelineSchedulesService.new.execute(user)
       end
+    end
 
     after_transition any => :deactivated do |user|
       next unless Gitlab::CurrentSettings.user_deactivation_emails_enabled

spec/models/user_spec.rb

@@ -1856,15 +1856,31 @@ RSpec.describe User do
     end
 
     context 'when user has running CI pipelines' do
-      let(:service) { double }
       let(:pipelines) { build_list(:ci_pipeline, 3, :running) }
 
-      it 'aborts all running pipelines and related jobs' do
+      it 'drops all running pipelines and related jobs' do
+        drop_service = double
+        disable_service = double
+
         expect(user).to receive(:pipelines).and_return(pipelines)
-        expect(Ci::DropPipelineService).to receive(:new).and_return(service)
-        expect(service).to receive(:execute_async_for_all).with(pipelines, :user_blocked, user)
+        expect(Ci::DropPipelineService).to receive(:new).and_return(drop_service)
+        expect(drop_service).to receive(:execute_async_for_all).with(pipelines, :user_blocked, user)
+
+        expect(Ci::DisableUserPipelineSchedulesService).to receive(:new).and_return(disable_service)
+        expect(disable_service).to receive(:execute).with(user)
+
+        user.block!
+      end
 
+      it 'does not drop running pipelines if the transaction rolls back' do
+        expect(Ci::DropPipelineService).not_to receive(:new)
+        expect(Ci::DisableUserPipelineSchedulesService).not_to receive(:new)
+
+        User.transaction do
           user.block
+
+          raise ActiveRecord::Rollback
+        end
       end
     end