删除project时，应该把project下面的task同时删除！否则数据库残留还多未标记删除的task。我自己外挂一个delete

                        <?php 
                        class 
                        project 
                        extends 
                        control 
                        { 
                         
                        public function 
                        delete
                        (
                        $projectID
                        ) 
                         { 
                         

                        $this
                        ->
                        project
                        ->delete(
                        TABLE_PROJECT
                        , 
                        $projectID
                        ); 
                         

                         
                        $this
                        ->
                        dao
                        ->update(
                        TABLE_TASK
                        )->set(
                        'deleted'
                        )->eq(
                        1
                        )->where(
                        'project'
                        )->eq(
                        $projectID
                        )->e x e c(); 
                         
                         

                         
                        if 
                        (dao::
                        isError
                        ()) 
                        $this
                        ->send(
                        array
                        (
                        'result' 
                        => 
                        'fail'
                        , 
                        'message' 
                        => dao::
                        getError
                        ())); 

                         
                        $this
                        ->send(
                        array
                        (
                        'result' 
                        => 
                        'success'
                        )); 
                         

                        } 

                        }