class CreateProjectCiCdSettings < ActiveRecord::Migration[4.2] include Gitlab::Database::MigrationHelpers DOWNTIME = false disable_ddl_transaction! def up unless table_exists?(:project_ci_cd_settings) create_table(:project_ci_cd_settings) do |t| t.integer(:project_id, null: false) t.boolean(:group_runners_enabled, default: true, null: false) end end disable_statement_timeout do # This particular INSERT will take between 10 and 20 seconds. execute 'INSERT INTO project_ci_cd_settings (project_id) SELECT id FROM projects' # We add the index and foreign key separately so the above INSERT statement # takes as little time as possible. add_concurrent_index(:project_ci_cd_settings, :project_id, unique: true) add_foreign_key_with_retry end end def down drop_table :project_ci_cd_settings end def add_foreign_key_with_retry # Between the initial INSERT and the addition of the foreign key some # projects may have been removed, leaving orphaned rows in our new settings # table. loop do remove_orphaned_settings begin add_project_id_foreign_key break rescue ActiveRecord::InvalidForeignKey say 'project_ci_cd_settings contains some orphaned rows, retrying...' end end end def add_project_id_foreign_key add_concurrent_foreign_key(:project_ci_cd_settings, :projects, column: :project_id) end def remove_orphaned_settings execute <<~SQL DELETE FROM project_ci_cd_settings WHERE NOT EXISTS ( SELECT 1 FROM projects WHERE projects.id = project_ci_cd_settings.project_id ) SQL end end