ThinkPHP 3.2.3 视图模型的使用

ThinkPHP 3.2.3 试图模型的手册地址是：http://www.kancloud.cn/manual/thinkphp/1781

实例

需求：在博客列表页读取博客的（id、标题、摘要、发布时间、点击次数）等信息以及该篇博文所属分类的（分类名）等信息

数据表：

crm_blog

+---------+----------------------+------+-----+---------+----------------+
| Field   | Type                 | Null | Key | Default | Extra          |
+---------+----------------------+------+-----+---------+----------------+
| id      | int() unsigned     | NO   | PRI | NULL    | auto_increment |
| title   | varchar()          | NO   |     |         |                |
| summary | varchar()         | NO   |     |         |                |
| content | text                 | NO   |     | NULL    |                |
| time    | int() unsigned     | NO   |     |        |                |
| click   | smallint() unsigned | NO   |     |        |                |
| cid     | int() unsigned     | NO   | MUL | NULL    |                |
| del     | tinyint() unsigned  | NO   |     |        |                |
+---------+----------------------+------+-----+---------+----------------+

crm_cate

+-------+------------------+------+-----+---------+----------------+
| Field | Type             | Null | Key | Default | Extra          |
+-------+------------------+------+-----+---------+----------------+
| id    | int() unsigned | NO   | PRI | NULL    | auto_increment |
| name  | char()         | NO   |     |         |                |
| pid   | int() unsigned | NO   | MUL |        |                |
| sort  | smallint()      | NO   |     |      |                |
+-------+------------------+------+-----+---------+----------------+

crm_blog 和 crm_cate 是多对一的关系（BELONGS_TO）

在 Home 模块的 Model（./Application/Home/Model）下创建 BlogViewModel.class.php

<?php
namespace Home\Model;
use Think\Model\ViewModel;
/*
 * 视图模型
 */

class BlogViewModel extends ViewModel{

    protected $viewFields = array(
        'blog'=>array(
            'id','title','summary','click','time',
            '_type'=>'LEFT' //关联方式，默认是 INNER
        ),
        'cate'=>array(
            'name'=>'cate_name',
            '_on'=>'blog.cid = cate.id' //关联条件
        )
    );

    public function get_all($where,$limit) {

        return $this->where($where)->limit($limit)->select();
    }
}

控制器 ./Application/Home/Controller/ListController.class.php

<?php
namespace Home\Controller;
use Think\Controller;
use Admin\Common\Category;
use Think\Page;

class ListController extends Controller{
    //列表页
    public function index() {

        $id = (int)$_GET['id'];
        $cate = M('cate')->order('sort')->select();

        //分类名称
        $this->cate_name = M('cate')->where(array('id'=>$id))->getField('name');

        //通过父id递归查出子id
        $cids = Category::get_children_id($cate, $id);
        $cids[] = $id;

        //分页
        $where = array('cid'=>array('IN',$cids));
        $count = M('blog')->where($where)->count();
        $page = new Page($count,1);
        $limit = $page->firstRow.','.$page->listRows;
        $this->page = $page->show();

        //使用试图模型
        $this->blog = D('BlogView')->get_all($where,$limit);
        //echo D('BlogView')->getLastSql();//一条联合查询语句 SELECT blog.id AS id,blog.title AS title,blog.summary AS summary,blog.click AS click,blog.time AS time,cate.name AS cate_name FROM crm_blog blog LEFT JOIN crm_cate cate ON blog.cid = cate.id WHERE `cid` IN ('13','12','11',4)

        $this->display();
    }
}

缺陷：在列表页分页完成之后，分页的链接并不是 URL 重写之后的链接，待改进。