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'
      )); 
       

      } 

      }