关联模型和无限极分类
今日总结：
关联模型
ONE_TO_ONE : HAS_ONE&BELONGS_TO
ONE_TO_MANY : HAS_MANY&BELONGS_TO
MANY_TO_MANY
首先在模型端定义 表名为首的模型类 集成 关联模型类
在类中 定义 保护变量 $_link = array();里面是字段的映射方式；
如：user表映射为 archive 为 hasone 映射方式、、或者说一对一也可以用belongsto
dept为 belongsto映射方式
grp为manytomany映射方式
默认的manytomany方式中间表名应定义为 操作表明_目标表名
也可以设置relation_table的值进行初始化
hasone 实例化对象 设置 relation（）参数为真值 并调用 对象关系映射的方法进行增删改查
关联模型对象 增删改查后 关联的唯一相应字段都会发生改变
自动填充~完成无限级分类
在活动段实例化对象 调用field方法 参数包含concat方法参数内包含path 连接符 - id as bpath 并调用连贯操作的order方法参数为bpath，对象关系映射的select方法。foreache遍历以上获取的多条数据并给每一条加入一个新字段count赋值为count方法 参数为 explode方法 参数为 连接符- bpath字段，从而让每条记录增加一个 和自己路径长度数相等的 count字段 让后 调用￥this 下的assign方法赋值 并调用display方法进行显示。
视图端为表单提交方向为add活动 调用volist标签 使option标签的value为 {$vo['id']} 在volist标签内使用php标签 进行for循环并输出空格 在php标签外在输出 name值
在自定义模型端 设置自动完成的值为array 设置 path字段为回调函数 tclm填充栏目 ， 定义函数 tclm 设置pid为传过来的pid 如果没有的话就赋值为0，如果是0 就 返回0，查询id为pid的条目设置 返回数据为 父条的path连接 - 连接 父条的id 即可
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