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超轻量级php框架startmvc

YII框架常用技巧总结

更新时间:2020-04-04 18:53:26 作者:startmvc
本文实例总结了YII框架常用技巧。分享给大家供大家参考,具体如下:获取当前Controllername

本文实例总结了YII框架常用技巧。分享给大家供大家参考,具体如下:

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

不生成label标签


// ActiveForm类
$form->field($model, '字段名')->passwordInput(['maxlength' => true])->label(false)

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]);
//可选传参
$dataProvider->query->andFilterWhere(['id'=>isset($id)?$id:null]);

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],
 ];
}

SQL is not null条件查询


// ['not' => ['attribute' => null]]
//['ISNULL(`attribute`)'=>true]
$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;
}

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);

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
 }
}

Model 里面 rules 联合唯一规则

[['store_id', 'member_name'], 'unique', 'targetAttribute' => ['store_id', 'member_name'], 'message' => 'The combination of Store ID and Member Name has already been taken.'],

Model多个字段一条规则不同提示


[['name', 'email', 'subject', 'body'], 'required','message'=>'{attribute} 必须'],

标量查询


Post::find()->select('title')->where(['user_id' => $userId])->scalar();

生成 SQL:


SELECT `title` FROM `post` WHERE `user_id` = 1

直接输出 title 的值。

如果 select('title') 不写的话,生成 SQL 是:


`SELECT * FROM `post` WHERE `user_id`=1`

直接输出 id 的值

表单验证,去除首尾空格:


public function rules()
{
 return [[title', 'content'],'trim']];
}

单独为某个Action关闭 Csrf 验证

新建一个Behavior


use Yii;
use yii\base\Behavior;
use yii\web\Controller;
class NoCsrf extends Behavior
{
 public $actions = [];
 public $controller;
 public function events()
 {
 return [Controller::EVENT_BEFORE_ACTION => 'beforeAction'];
 }
 public function beforeAction($event)
 {
 $action = $event->action->id;
 if (in_array($action, $this->actions)) {
 $this->controller->enableCsrfValidation = false;
 }
 }
}

然后在Controller中添加Behavior


public function behaviors()
{
 return [
 'csrf' => [
 'class' => NoCsrf::className(),
 'controller' => $this,
 'actions' => [
 'action - name'
 ]
 ]
 ];
}

LIKE 查询 单边加 %


['like', 'name', 'tester'] 会生成 name LIKE ' % tester % '。
['like', 'name', ' % tester', false] => name LIKE ' % tester'
$query = User::find()->where(['LIKE', 'name', $id . ' % ', false]);

SQL 随机抽取十名幸运用户


$query = new Query;
$query->select('ID, City,State,StudentName')
 ->from('student')
 ->where(['IsActive' => 1])
 ->andWhere(['not', ['State' => null]])
 ->orderBy(['rand()' => SORT_DESC])
 ->limit(10);

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;
}

批量插入数据

第一种方法


$model = new User();
foreach ($data as $attributes) {
 $_model = clone $model;
 $_model->setAttributes($attributes);
 $_model->save();
}

第二种方法


$model = new User();
foreach ($data as $attributes) {
 $model->isNewRecord = true;
 $model->setAttributes($attributes);
 $model->save() && $model->id = 0;
}

URL操作

获取url中的host信息


Yii::$app->request->getHostInfo()

获取url中的路径信息(不包含host和参数):


Yii::$app->request->getPathInfo()

获取不包含host信息的url(含参数):


# /public/index.php?r=news&id=1
Yii::$app->request->url

或者


Yii::$app->request->requestUri

只想获取url中的参数部分


# r=news&id=1
Yii::$app->getRequest()->queryString;

获取某个参数的值,比如id


Yii::$app->getRequest()->getQuery('id'); //get parameter 'id'

获取(除域名外的)首页地址


# /public/index.php
Yii::$app->user->returnUrl;

获取Referer


Yii::$app->request->headers['Referer']

或者


Yii::$app->getRequest()->getReferrer()

YII框架 技巧