Yii2 implements paging, example of paging function with search

1. Model configuration

The example will use three models. The article category table and article table can be generated with gii, and the last one is the search verification model. Among them, we only talk about the next joint table and search verification. No other operations are required.

1. Article table association

<?php
//...other code
//关联
public function getCate(){
    return $this->hasOne(ArticleCate::className(),[&#39;id&#39; => &#39;cid&#39;]);
  }
?>

2. Search model

common/models/search/Create ArticleSearch.php

<?php
 
namespace common\models\search;
 
use Yii;
use yii\base\Model;
use yii\data\ActiveDataProvider;
use common\models\Article;
 
class ArticleSearch extends Article
{
  //public $cname;//文章类别名
   
  /**
   * @inheritdoc
   */
  public function rules()
  {
    return [
      [[&#39;cid&#39;,&#39;created_at&#39;, &#39;updated_at&#39;], &#39;integer&#39;],
      [[&#39;id&#39;, &#39;desc&#39;,&#39;title&#39;,&#39;cover&#39;,&#39;content&#39;], &#39;safe&#39;],
    ];
  }
 
  /**
   * @inheritdoc
   */
  public function scenarios()
  {
    // bypass scenarios() implementation in the parent class
    return Model::scenarios();
  }
 
  //搜索
  public function search($params)
  {
    $query = Article::find();
    // $query->joinWith([&#39;cate&#39;]);//关联文章类别表
    // $query->joinWith([&#39;author&#39; => function($query) { $query->from([&#39;author&#39; => &#39;users&#39;]); }]);
 
    $dataProvider = new ActiveDataProvider([
      &#39;query&#39; => $query,
      &#39;pagination&#39; => [
        &#39;pageSize&#39; => 2,
      ],
    ]);
    // 从参数的数据中加载过滤条件，并验证
    $this->load($params);
 
    if (!$this->validate()) {
      // uncomment the following line if you do not want to any records when validation fails
      // $query->where(&#39;0=1&#39;);
      return $dataProvider;
    }
 
    // 增加过滤条件来调整查询对象
    $query->andFilterWhere([
      // &#39;cname&#39; => $this->cate.cname,
      &#39;title&#39; => $this->title,
    ]);
 
    $query->andFilterWhere([&#39;like&#39;, &#39;title&#39;, $this->title]);
    //$query->andFilterWhere([&#39;like&#39;, &#39;cate.cname&#39;, $this->cname]) ;
 
    return $dataProvider;
  }
}

2. Paging use

Method 1

First, in the action of the controller, create the paging object and fill it with data :

<?php
//other code
use yii\data\Pagination;
public function actionArticlelist()
  {
    //分页读取类别数据
    $model = Article::find()->with(&#39;cate&#39;);
    $pagination = new Pagination([
      &#39;defaultPageSize&#39; => 3,
      &#39;totalCount&#39; => $model->count(),
    ]);
 
    $model = $model->orderBy(&#39;id ASC&#39;)
      ->offset($pagination->offset)
      ->limit($pagination->limit)
      ->all();
 
    return $this->render(&#39;index&#39;, [
      &#39;model&#39; => $model,
      &#39;pagination&#39; => $pagination,
    ]);
  }
?>

Secondly, in the view, the template we output is the current page and is linked to the page through the paging object:

<?php
use yii\widgets\LinkPager;
use yii\helpers\Html;
use yii\helpers\Url;
//other code
foreach ($models as $model) {
  // 在这里显示 $model
}
 
// 显示分页
echo LinkPager::widget([
  &#39;pagination&#39; => $pagination,
  &#39;firstPageLabel&#39;=>"First",
  &#39;prevPageLabel&#39;=>&#39;Prev&#39;,
  &#39;nextPageLabel&#39;=>&#39;Next&#39;,
  &#39;lastPageLabel&#39;=>&#39;Last&#39;,
]);
?>

Method Two

Controller:

<?php
    $query = Article::find()->with(&#39;cate&#39;);
 
    $provider = new ActiveDataProvider([
      &#39;query&#39; => $query,
      &#39;pagination&#39; => [
        &#39;pageSize&#39; => 3,
      ],
      &#39;sort&#39; => [
        &#39;defaultOrder&#39; => [
          //&#39;created_at&#39; => SORT_DESC,
          //&#39;title&#39; => SORT_ASC,
        ]
      ],
    ]);
    return $this->render(&#39;index&#39;, [
      &#39;model&#39; => $query,
      &#39;dataProvider&#39; => $provider
    ]);
?>

##View:

<?php
use yii\grid\GridView;
echo GridView::widget([
  &#39;dataProvider&#39; => $dataProvider,
  //每列都有搜索框 控制器传过来$searchModel = new ArticleSearch();
  //&#39;filterModel&#39; => $searchModel,
  &#39;layout&#39;=> &#39;{items}<div class="text-right tooltip-demo">{pager}</div>&#39;,
   &#39;pager&#39;=>[
        //&#39;options&#39;=>[&#39;class&#39;=>&#39;hidden&#39;]//关闭自带分页
        &#39;firstPageLabel&#39;=>"First",
        &#39;prevPageLabel&#39;=>&#39;Prev&#39;,
        &#39;nextPageLabel&#39;=>&#39;Next&#39;,
         &#39;lastPageLabel&#39;=>&#39;Last&#39;,
   ],
  &#39;columns&#39; => [
    //[&#39;class&#39; => &#39;yii\grid\SerialColumn&#39;],//序列号从1开始
    // 数据提供者中所含数据所定义的简单的列
    // 使用的是模型的列的数据
    &#39;id&#39;,
    &#39;username&#39;,
    [&#39;label&#39;=>&#39;文章类别&#39;, /*&#39;attribute&#39; => &#39;cid&#39;,产生一个a标签,点击可排序*/ &#39;value&#39; => &#39;cate.cname&#39; ],
    [&#39;label&#39;=>&#39;发布日期&#39;,&#39;format&#39; => [&#39;date&#39;, &#39;php:Y-m-d&#39;],&#39;value&#39; => &#39;created_at&#39;],
    // 更复杂的列数据
    [&#39;label&#39;=>&#39;封面图&#39;,&#39;format&#39;=>&#39;raw&#39;,&#39;value&#39;=>function($m){
     return Html::img($m->cover,[&#39;class&#39; => &#39;img-circle&#39;,&#39;width&#39; => 30]);
    }],
    [
      &#39;class&#39; => &#39;yii\grid\DataColumn&#39;, //由于是默认类型，可以省略
      &#39;value&#39; => function ($data) {
        return $data->name;
        // 如果是数组数据则为 $data[&#39;name&#39;] ，例如，使用
 
SqlDataProvider 的情形。
      },
    ],
    [
     &#39;class&#39; => &#39;yii\grid\ActionColumn&#39;,
     &#39;header&#39; => &#39;操作&#39;,
     &#39;template&#39; => &#39;{delete} {update}&#39;,//只需要展示删除和更新
     /*&#39;headerOptions&#39; => [&#39;width&#39; => &#39;80&#39;],*/
     &#39;buttons&#39; => [
       &#39;delete&#39; => function($url, $model, $key){
           return Html::a(&#39;<i class="glyphicon glyphicon-trash"></i> 删除&#39;,
               [&#39;artdel&#39;, &#39;id&#39; => $key],
               [&#39;class&#39; => &#39;btn btn-default btn-xs&#39;,
               &#39;data&#39; => [&#39;confirm&#39; => &#39;你确定要删除文章吗？&#39;,]
               ]);
       },
      &#39;update&#39; => function($url, $model, $key){
           return Html::a(&#39;<i class="fa fa-file"></i> 更新&#39;,
              [&#39;artedit&#39;, &#39;id&#39; => $key],
              [&#39;class&#39; => &#39;btn btn-default btn-xs&#39;]);
       },
      ],
     ],
  ],
]);
?>

3. Search with paging function

Create search model (already done before)

Control incoming data

View display controller code:

<?php
public function actionIndex()
{
 $searchModel = new ArticleSearch();
 $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
 
  return $this->render(&#39;index&#39;, [
    &#39;searchModel&#39; => $searchModel,
    &#39;dataProvider&#39; => $dataProvider,
  ]);
 }
?>

View:

<?php $form = ActiveForm::begin([
  &#39;action&#39; => [&#39;index&#39;],
   &#39;method&#39; => &#39;get&#39;,
   &#39;id&#39; => &#39;cateadd-form&#39;,
   &#39;options&#39; => [&#39;class&#39; => &#39;form-horizontal&#39;],
]); ?>
           
<?= $form->field($searchModel, &#39;title&#39;,[
   &#39;options&#39;=>[&#39;class&#39;=>&#39;&#39;],
   &#39;inputOptions&#39; => [&#39;placeholder&#39; => &#39;文章搜索&#39;,&#39;class&#39; => &#39;input-sm form-control&#39;],
])->label(false) ?>
  <?= Html::submitButton(&#39;Go!&#39;, [&#39;class&#39; => &#39;btn btn-sm btn-primary&#39;]) ?>
<?php ActiveForm::end(); ?>
<?= GridView::widget([
          &#39;dataProvider&#39; => $dataProvider,
          &#39;layout&#39;=> &#39;{items}<div class="text-right tooltip-demo">{pager}</div>&#39;,
          &#39;pager&#39;=>[
            //&#39;options&#39;=>[&#39;class&#39;=>&#39;hidden&#39;]//关闭自带分页
            &#39;firstPageLabel&#39;=>"First",
            &#39;prevPageLabel&#39;=>&#39;Prev&#39;,
            &#39;nextPageLabel&#39;=>&#39;Next&#39;,
            &#39;lastPageLabel&#39;=>&#39;Last&#39;,
          ],
       //这部分和上面的分页是一样的

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