BEGIN
  NEW.updated_at := NOW();
  UPDATE public.projects 
  SET updated_at = NEW.updated_at 
  WHERE id = NEW.project_id;
  INSERT INTO public.document_contributor (document_id, contributor)
  VALUES (NEW.id, NEW.created_by)
  ON CONFLICT
  DO NOTHING;
  INSERT INTO public.commits (message, created_by, project_id, document_id, created_at, previous_content, current_content)
  VALUES (NEW.note, NEW.updated_by, NEW.project_id, NEW.id, NEW.updated_at, OLD.content, NEW.content);
  RETURN NEW;
END