openproject/db/migrate/migration_utils/permission_adder.rb

#-- copyright
# OpenProject is an open source project management software.
# Copyright (C) 2012-2022 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2013 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See COPYRIGHT and LICENSE files for more details.
#++

module Migration
  module MigrationUtils
    class PermissionAdder
      def self.add(having, add)
        Role
          .joins(:role_permissions)
          .where(role_permissions: { permission: having.to_s })
          .references(:role_permissions)
          .find_each do |role|
          # Check if the add-permission already exists before adding
          already_exists = RolePermission
                             .exists?(role_id: role.id, permission: add.to_s)
          unless already_exists
            role.add_permission! add
          end
        end
      end
    end
  end
end