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(10) unsigned     | NO   | PRI | NULL    | auto_increment |
| title   | varchar(30)          | NO   |     |         |                |
| summary | varchar(255)         | NO   |     |         |                |
| content | text                 | NO   |     | NULL    |                |
| time    | int(10) unsigned     | NO   |     | 0       |                |
| click   | smallint(6) unsigned | NO   |     | 0       |                |
| cid     | int(10) unsigned     | NO   | MUL | NULL    |                |
| del     | tinyint(1) unsigned  | NO   |     | 0       |                |
+---------+----------------------+------+-----+---------+----------------+

crm_cate

+-------+------------------+------+-----+---------+----------------+
| Field | Type             | Null | Key | Default | Extra          |
+-------+------------------+------+-----+---------+----------------+
| id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| name  | char(20)         | NO   |     |         |                |
| pid   | int(10) unsigned | NO   | MUL | 0       |                |
| sort  | smallint(6)      | NO   |     | 100     |                |
+-------+------------------+------+-----+---------+----------------+

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。