这里的ProjectionMap必须是一个hashmap,更重要的是：
If a projection map is set it must contain all column names the user may request, even if the key and value are the same.
orz...
另外ProjectionMap.put("user_id", UserTableMetaData._ID); 键为别名，值为原列名
这里的ProjectionMap必须是一个hashmap,更重要的是：
If a projection map is set it must contain all column names the user may request, even if the key and value are the same.
orz...
另外ProjectionMap.put("user_id", UserTableMetaData._ID); 键为别名，值为原列名
![YII中一步一步的配置SRBAC[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)