场景: 数据库有user
表有个avatar_path
字段用来保存用户头像路径
需求: 头像url需要通过域名http://b.com/
作为基本url
目标: 提高代码复用
此处
http://b.com/
可以做成一个配置
示例:
User.php
class User extends \yii\db\ActiveRecord { ... public function extraFields() { $fields = parent::extraFields(); $fields['avatar_url'] = function () { return empty($this->avatar_path) ? '可以设置一个默认的头像地址' : 'http://b.com/' . $this->avatar_path; }; return $fields; } ... }
ExampleController.php
class ExampleController extends \yii\web\Controller { public function actionIndex() { $userModel = User::find()->one(); $userData = $userModel->toArray([], ['avatar_url']); echo $userData['avatar_url']; // 输出内容: http://b.com/头像路径 } }
表单提交失败调试代码
echo array_values($model->getFirstErrors())[0];exit;
获取当前Controller name和action name(在控制器里面使用)
echo $this->id; echo $this->action->id;
控制器获取当前模块
$this->module->id
写 log 日志
use yii\log\Logger; \Yii::getLogger()->log('User has been created', Logger::LEVEL_INFO);
不生成label标签
// ActiveForm类 $form->field($model, '字段名')->passwordInput(['maxlength' => true])->label(false) ?> // HTML类 Html::activeInput($type,$model,'字段名')
Yii2 获取接口传过来的 JSON 数据:
Yii::$app->request->rawBody;
防止 SQL 和 Script 注入:
use yii\helpers\Html; use yii\helpers\HtmlPurifier; echo Html::encode($view_hello_str) //可以原样显示<script></script>代码 echo HtmlPurifier::process($view_hello_str) //可以过滤掉<script></script>代码
大于、小于条件查询
// SELECT * FROM `order` WHERE `subtotal` > 200 ORDER BY `id` $orders = $customer->getOrders() ->where(['>', 'subtotal', 200]) ->orderBy('id') ->all();
搜索的时候添加条件筛选
$dataProvider = $searchModel->search(Yii::$app->request->queryParams); // $dataProvider->query->andWhere(['pid' => 0]); $dataProvider->query->andWhere(['>', 'pid', 0]);
事务的用法
$transaction = $connection->beginTransaction(); try { $connection->createCommand($sql1)->execute(); $connection->createCommand($sql2)->execute(); //.... other SQL executions $transaction->commit(); } catch (Exception $e) { $transaction->rollBack(); }
有两种方式获取查询出来的 name
为数组的集合 [name1, name2, name3]
:
方式一:
return \yii\helpers\ArrayHelper::getColumn(User::find()->all(), 'name');
方式二:
return User::find()->select('name')->asArray()->column();
打印数据:
// 引用命名空间 use yii\helpers\VarDumper; // 使用 VarDumper::dump($var); // 使用2 第二个参数是数组的深度 第三个参数是是否显示代码高亮(默认不显示) VarDumper::dump($var, 10 ,true);die;
表单验证,只要需要一个参数:
public function rules() { return [ [['card_id', 'card_code'], function ($attribute, $param) {//至少要一个 if (empty($this->card_code) && empty($this->card_id)) { $this->addError($attribute, 'card_id/card_code至少要填一个'); } }, 'skipOnEmpty' => false], ]; }
where 多个查询条件示例:
User::find()->where(['and', ['xxx' => 0, 'yyy' => 2], ['>', 'zzz', $time]);
获取post数据
$post = Yii::$app->request->post(); $id = $post['id'];
查找 auth_times
表 type=1
并且 不存在 auth_item
表里面的数据
// AuthItem.php 关键是 onCondition 方法 public function getAuthTimes() { return $this->hasOne(AuthTimes::className(), ['name' => 'name', ])->onCondition([AuthTimes::tableName() . '.type' => 1]); } // AuthTimes.php 文件 // ...... AuthItem::find()->joinWith('authTimes')->where([self::tableName() . '.name' => null])->all();
生成SQL:
SELECT `auth_item`.* FROM `auth_item` LEFT JOIN `auth_times` ON `auth_item`.`name` = `auth_times`.`name` AND `auth_times`.`type` = 1 WHERE `auth_times`.`name` IS NULL
SQL is not null
条件查询
// ['not' => ['attribute' => null]] $query = new Query; $query->select('ID, City,State,StudentName') ->from('student') ->where(['IsActive' => 1]) ->andWhere(['not', ['City' => null]]) ->andWhere(['not', ['State' => null]]) ->orderBy(['rand()' => SORT_DESC]) ->limit(10);
校验 point_template_id
在 PointTemplate 是否存在
public function rules() { return [ ... [['point_template_id'], 'exist', 'targetClass' => PointTemplate::className(), 'targetAttribute' => 'id', 'message' => '此{attribute}不存在。' ], ... ]; }
Yii给必填项加星
div.required label:after { content: " *"; color: red; }
view里面获取当前action
var_dump(Yii::$app->controller->action->id);
关于事务:
Yii::$app->db->transaction(function() { $order = new Order($customer); $order->save(); $order->addItems($items); }); // 这相当于下列冗长的代码: $transaction = Yii::$app->db->beginTransaction(); try { $order = new Order($customer); $order->save(); $order->addItems($items); $transaction->commit(); } catch (\Exception $e) { $transaction->rollBack(); throw $e; }
restful 获取 GET 和 POST 过来的数据(得到结果是数组):
// post Yii::$app->request->bodyParams // get Yii::$app->request->queryParams;
获取GET数据
$server_id = Yii::$app->getRequest()->get()['server_id']; $server_id = Yii::$app->getRequest()->get('server_id');
查询的时候 where 的 OR 和 AND 一起用
Topic::updateAll( ['last_comment_time' => new Expression('created_at')], // ['or', ['type' => Topic::TYPE, 'last_comment_username' => ''], ['type' => Topic::TYPE, 'last_comment_username' => null]] ['and', ['type' => Topic::TYPE], ['or', ['last_comment_username' => ''], ['last_comment_username' => null]]] );
Yii2 生成url的两种方式实例:
<a href="<?= \yii\helpers\Url::toRoute('mysql/view/'.$model->id); ?>">Link1</a> <a href="<?= Yii::$app->urlManager->createUrl(['mysql/chart/','server_id'=>$model->server_id,'time_interval'=>'1800','end'=>'0' ]); ?>" >Link2</a>
嵌套查询,groupBy 分组之后排序功能
$subQuery = new Query(); $subQuery->from(PostComment::tableName())->where(['status' => PostComment::STATUS_ACTIVE])->orderBy(['created_at' => SORT_DESC]); $comment = PostComment::find()->from(['tmpA' => $subQuery]) ->groupBy('post_id') ->all();
生成的语句是
SELECT * FROM (SELECT * FROM `post_comment` WHERE `status`=1 ORDER BY `created_at` DESC) `tmpA` GROUP BY `post_id`
Model 获取当前 module id
Yii::$app->controller->module->id
一个控制器调用其他控制器action的方法:
Yii::$app->runAction('new_controller/new_action', $params); // 或者 return (new SecondController('second', Yii::$app->module))->runAction('index', $data);
IP 白名单
$config['modules']['debug'] = [ 'class' => 'yii\debug\Module', 'allowedIPs' => ['127.0.0.1', '::1', '192.168.0.*', '192.168.33.1'], ];
点击下载文件 action
public function actionDownload($id) { $model = $this->findModel($id); if ($model) { // do something } return \Yii::$app->response->setDownloadHeaders($model->downurl); }
发送邮件 1.config/config.php中的components配置
'mailer' => [ 'class' => 'yii\swiftmailer\Mailer', 'useFileTransport' => false, 'transport' => [ 'class' => 'Swift_SmtpTransport', 'host' => 'smtp.gmail.com', 'username' => 'admin@gmail.com', 'password' => 'password12345678', 'port' => 587,//or 25/587 'encryption' => 'tls',//tls or ssl ] ],
2.使用
Yii::$app->mailer->compose() ->setFrom(['admin@gmail.com' => Yii::$app->name]) ->setTo('admin@gmail.com') ->setSubject('test subject') ->setTextBody('test body') ->send();
修改登陆状态超时时间(到期后自动退出登陆) config/web.php中的components
'user' => [ 'class'=>'yii\web\User', 'identityClass' => 'common\models\User', 'loginUrl'=>['/user/sign-in/login'], 'authTimeout' => 1800,//登陆有效时间 'as afterLogin' => 'common\behaviors\LoginTimestampBehavior' ],
修改返回的数据格式(详见Response::FORMAT_XXXX)
$result = array('code' => $code, 'msg' => $msg, 'data' => $data); $callback = Yii::$app->request->get('callback',null); $format = $callback ? Response::FORMAT_JSONP : Response::FORMAT_JSON; Yii::$app->response->format = $format; if($callback){ return array( 'callback' => $callback, 'data' => $result ); } return $result;
执行SQL查询并缓存结果
$styleId = Yii::$app->request->get('style'); $collection = Yii::$app->db->cache(function($db) use($styleId){ return Collection::findOne(['style_id'=>$styleId]); }, self::SECONDS_IN_MINITUE * 10);