YII load()

  看上图 其中数组 UniversityPostSearch 是通过前端表单传过来的数据，而我只想验证 这个表单数据是不是合法 应该这样写

$this->load($param,'UniversityPostSearch'); 

参数 $param 是YII::$app->requist->get() 传过来的所有值 就是上图的 array(3){[id] = .......}
参数 'UniversityPostSearch' 是需要验证的表单

这个加载的好处就是 不用再一步一步的复制 其作用等价于

$this->title = (string)$param['UniversityPostSearch']['title'];

$this->create_time_start = (string)$param['UniversityPostSearch']['create_time_start'];

$this->create_time_end = (string)$param['UniversityPostSearch']['create_time_end'];

$this->status = (int)$param['UniversityPostSearch']['status'];

....

好多行逐一赋值的代码  浓缩为  一行代码 也即

$this->load($param,'UniversityPostSearch');

底层 load() 函数的代码如下图 这就是为什么要传第二个参数的原因

接下来就是rule规则验证的问题

为什么create_time_start 和 create_time_end 需要单独定义一下，而 'is_top'， 'title' 不用定义，直接写在 rule()方法  里面了  ??

因为 create_time_start   create_time_end 并不是数据库已经存在的字段 如果不写的话 $this->create_time_start 就会报错    说Undifiend create_time_start ..

而 'is_top' , 'title' 是数据库里面的字段，不用定义，就可以 引用 $this->is_top，但是必须要写在rules规则里面，不写错，值为null，赋值就不起作用了。

全部代码如下

<?php
/**
 * Created by PhpStorm.
 * User: tangwei
 * Date: 2018-12-19
 * Time: 11:26
 */

namespace businessmodelsuniversitysearch;

use commonmodelsquanQuanPost;
use yiidataActiveDataProvider;

class UniversityPostSearch extends QuanPost
{

    public $create_time_start;
    public $create_time_end;

public function rules()
{
   return [
     [ ['create_time_start', 'create_time_end','title'], 'string'], 
     [ ['is_top','status','is_essence','sort'] ,'integer'],
   ];
}

    public function search($param,$university){


        $query = QuanPost::find()->select('
              quan_post.id,
              quan_post.title,
              quan_post.num_view,
              quan_post.num_praise,
              quan_post.num_comment,
              quan_post.status,
              quan_post.create_at,
              quan_post.is_top,
              quan_topic.title as topic_title,
              
              quan_module.name as module_name,
        ')
         ->leftJoin('quan_topic','quan_post.topic_id = quan_topic.id')
         ->leftJoin('quan_module','quan_post.module_id_school = quan_module.id')
         ->andWhere(['university_id' => $university]);

        $dataProvider = new ActiveDataProvider([
            'query' => $query,
            'pagination' => [
                'pageSize' => 10,
            ]
        ]);

        $this->load($param,'UniversityPostSearch');

       

        if(!$this->validate()){
            return $dataProvider;
        }


        if(!empty($this->title)){

            $query->andWhere(['like','quan_post.title', $this->title]);
        }

        if(!empty($this->create_time_start)){

            $query->andWhere(['>=', 'quan_post.create_at', strtotime($this->create_time_start)]);
        }

        if(!empty($this->create_time_end)){

            $query->andWhere(['<=', 'quan_post.create_at', strtotime($this->create_time_end)]);
        }

        #审核状态
        if(is_numeric($this->status)){

            $query->andWhere(['quan_post.status' => $this->status]);
        }

        #是否置顶
        if(is_numeric($this->is_top)){

            $query->andWhere(['quan_post.is_top' => $this->is_top]);
        }

        #是否加精
        if(is_numeric($this->is_essence)){

            $query->andWhere(['quan_post.is_essence' => $this->is_essence]);
        }

        #排序
        if(!empty($this->sort)){

            #最热排序
            $query->addOrderBy('quan_post.num_view desc');

        }else{
             #最新排序
            $query->addOrderBy('quan_post.create_at desc');
        }


        return $dataProvider;
    }
}