首先，先来看一下问题代码：
1、控制器代码如下：
public function actionIndex() { $query = Country::find(); $pagination = new Pagination([ 'defaultPageSize' => 5, 'totalCount' => $query->count() ]); $countries = $query->orderBy('name') ->offset($pagination->offset) ->limit($pagination->limit) ->all(); return $this->render('index', [ 'countries' => $countries, 'pagination' => $pagination, ]); }
（推荐教程：yii框架）
<?php return [ 'class' => 'YIIdbConnection', 'dsn' => 'mysql:host=localhost;dbname=yii2basic', 'username' => 'root', 'password' => '', 'charset' => 'utf8', // Schema cache options (for production environment) //'enableSchemaCache' => true, //'schemaCacheDuration' => 60, //'schemaCache' => 'cache', ];
解决方法：
将pdo连接中的dsn的host由“localhost”改为“127.0.0.1”即可，打开文件DB.PHP，修改如下：
<?php return [ 'class' => 'yiidbConnection', 'dsn' => 'mysql:host=127.0.0.1;dbname=yii2basic', 'username' => 'root', 'password' => '', 'charset' => 'utf8', // Schema cache options (for production environment) //'enableSchemaCache' => true, //'schemaCacheDuration' => 60, //'schemaCache' => 'cache', ];
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