[moka同学笔记]yii2.0数据库操作以及分页

1.model中models/article.php

 1 <?php
 2 
 3 namespace appmodels;
 4 
 5 use Yii;
 6 
 7 /**
 8  * This is the model class for table "yii2_article".
 9  *
10  * @property string $id
11  * @property integer $category_id
12  * @property string $title
13  * @property string $image
14  * @property string $content
15  * @property string $create_at
16  * @property string $updata_at
17  */
18 class Article extends yiidbActiveRecord
19 {
20     /**
21      * @inheritdoc
22      */
23     public static function tableName()
24     {
25         return 'yii2_article';
26     }
27 
28     /**
29      * @inheritdoc
30      */
31     public function rules()
32     {
33         return [
34             [['category_id'], 'integer'],
35             [['desc','content'], 'string'],
36             [['create_at', 'updata_at'], 'safe'],
37             [['title'], 'string', 'max' => 50],
38             [['image'], 'string', 'max' => 100]
39         ];
40     }
41 
42     /**
43      * @inheritdoc
44      */
45     public function attributeLabels()
46     {
47         return [
48             'id' => 'ID',
49             'category_id' => '栏目',
50             'title' => '标题',
51             'desc' => '描述',
52             'image' => '封面图片',
53             'content' => '内容',
54             'create_at' => '创建日期',
55             'updata_at' => '修改日期',
56         ];
57     }
58 
59     //根据文章查询栏目的信息，hasOne()因为一个文章只属于一个栏目，一比一的方法
60     public function getArticleCategory(){
61         return $this->hasOne(ArticleCategory::className(),['id'=>'category_id']);
62     }
63 }

2.控制器中ArticleController.php

<?php

namespace appcontrollers;

use Yii;
use appmodelsArticle;
use yiidataActiveDataProvider;
use yiidbQuery;
use yiiwebController;
use yiiwebNotFoundHttpException;
use yiidataPagination;
class ArticleController extends Controller
{    //public $layout="main";
    public function actionIndex()
    {
        $article = Article::find();
        $articleCount = clone $article;

        $pageSize = 5;

        $pages =new Pagination([
            'totalCount'=>$articleCount->count(),
            'pageSize'=>$pageSize
        ]) ;

        $models = $article->offset($pages->offset)
            ->limit($pages->limit)
            ->orderBy('id DESC')
            ->all();

        return $this->render('index',[
            'models'=>$models,
            'pages'=>$pages
        ]);
    }
}

3.视图中view/article/index.php

<?php
/**
 * Created by PhpStorm.
 * User: moka同学
 * Date: 2016/07/22
 * Time: 11:13
 */
use yiiwidgetsLinkPager;
use yiihelpersUrl;
?>
<?php
foreach ($models as $model) {
    ?>
    <div class="artcicle-list">
        <h4 class="text-left h4">
            <a href="<?=Url::toRoute(['article/view','id'=>$model->id]);?>" class="not-set"><?= $model->title ?></a>
            </h4>

        <p class="text-right">
            <small><?= $model->create_at ?></small>
        </p>
        <div class="col-l">
            <?= isset($model->image) ? "<div class='face-image'><img src='$model->image' style=' 120px;height: 120px;margin-right: 10px;vertical-align: text-top '></div>" : ""; ?>
            <div class="article-content fl"><?=mb_substr($model->content,0,400,'utf-8').'……' ?><a href="<?=Url::toRoute(['article/view','id'=>$model->id]);?>">查看详情</a></div>
        </div>
    </div>
<?php } ?>
<div class="pagination-sm text-center">
    <?= LinkPager::widget([
        'pagination' => $pages,
        'options' => [
            'class' => 'pagination',
        ]
    ]) ?>
</div>

这个是很基础的model使用，如有不对，请联系我。QQ1727728211