class GroupMembersFinder def initialize(group) @group = group end def execute group_members = @group.members return group_members unless @group.parent parents_members = GroupMember.non_request. where(source_id: @group.ancestors.select(:id)). where.not(user_id: @group.users.select(:id)) wheres = ["members.id IN (#{group_members.select(:id).to_sql})"] wheres << "members.id IN (#{parents_members.select(:id).to_sql})" GroupMember.where(wheres.join(' OR ')) end end