5-关联模型

1、 SectionModel.class.php

    要继承 RelationModel，映射模型和类名写对应上数据表和action类

<?php
    class SectionModel extends RelationModel{
        public $_link=array(
            'Category'=>array(
                'mapping_type'=>HAS_MANY,  //关联关系 1：n
                'class_name'=>'Category',    //对应类名
                'foreign_key'=>'sectionid',     //外键，分类表的字段
                'mapping_name'=>'category',    //映射模型
                'mapping_order'=>'sectionid desc', //映射排序
            ),
            'Article'=>array(
                'mapping_type'=>HAS_MANY,
                'class_name'=>'Article',
                'foreign_key'=>'sectionid',
                'mapping_name'=>'article',
            
            ),
        );
        

2、SectionAction.class.php  

　　开启关联relation(true)->

<?php
        class SectionAction extends CommonAction{
            public function index(){
                $sec=new SectionModel();
//Relation(true)会关联保存User模型定义的所有关联数据
//-----查询 
//dump($sec->relation(true)->find(3));


/*----创建数据
                2.INSERT INTO `joys_section` (`title`) VALUES ('自定义单元') [ RunTime:0.001198s ]
3.SHOW COLUMNS FROM `joys_category` [ RunTime:0.005667s ]
4.INSERT INTO `joys_category` (`title`,`alias`,`sectionid`) VALUES ('自定义分类1','test11',8) [ RunTime:0.000496s ]
5.INSERT INTO `joys_category` (`title`,`alias`,`sectionid`) VALUES ('自定义分类12','test21',8) [ RunTime:0.000302s ]
                
                
                $data['title']="自定义单元";
                $data['category']=array(
                    array('title'=>'自定义分类1','alias'=>'test11'),
                    array('title'=>'自定义分类12','alias'=>'test21')
                    );
                $sec->relation(true)->add($data);*/
/*----更新数据    
/*SHOW COLUMNS FROM `joys_section` [ RunTime:0.007477s ]
UPDATE `joys_section` SET `id`=8,`title`='自定义单元' WHERE ( id=8 ) [ RunTime:0.002553s ]
SHOW COLUMNS FROM `joys_category` [ RunTime:0.008511s ]
INSERT INTO `joys_category` (`title`,`alias`,`sectionid`) VALUES ('自定义分类88','test',8) [ RunTime:0.000866s ]
SHOW COLUMNS FROM `joys_article` [ RunTime:0.011497s ]
                
                $data['id']=8;    //更新的时候要加上$data['id']=8;，不然从表更新不了
                $data['title']="自定义单元";
                $data['category']=array(
                    array('title'=>'自定义分类88','alias'=>'test')
                    );
            $sec->relation(true)->where('id=8')->save($data);
            *
            */        
                
                
//---------删除                
/*DELETE FROM `joys_section` WHERE ( `id` = 8 ) [ RunTime:0.002513s ]
SHOW COLUMNS FROM `joys_category` [ RunTime:0.013709s ]
DELETE FROM `joys_category` WHERE ( `sectionid` = 8 ) [ RunTime:0.000967s ]
SHOW COLUMNS FROM `joys_article` [ RunTime:0.014401s ]
DELETE FROM `joys_article` WHERE ( `sectionid` = 8 ) [ RunTime:0.001064s ]
                    
                $sec->relation(true)->delete(8);*/
            $data['id']=8;    //更新的时候要加上$data['id']=8;，不然从表更新不了
                $data['title']="自定义单元";
                $data['category']=array(
                    array('title'=>'自定义分类88','alias'=>'test')
                    );
            $sec->relation(true)->where('id=8')->save($data);    
                
                
                
                $this->display();    
            }