[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 app\models;
 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 \yii\db\ActiveRecord
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 app\controllers;

 use Yii;
 use app\models\Article;
 use yii\data\ActiveDataProvider;
 use yii\db\Query;
 use yii\web\Controller;
 use yii\web\NotFoundHttpException;
 use yii\data\Pagination;
 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 yii\widgets\LinkPager;
 use \yii\helpers\Url;
 ?>
 <?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='$model->image' style='width: 120px;height: 120px;margin-right: 10px;vertical-align: text-top '></div>" : ""; ?>
             <div class="article-content fl"><?=mb_substr($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