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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($var, 10 ,true);die;
YII更新到2.0.5啦！
表单验证，只要需要一个参数：
public function rules()
{
return [
[['card_id', 'card_code'], function ($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'];
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]]]
);
@echo 关于事务的那段 那种写法有点酷
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>
@ruzuojun 求分析这两者的区别，和优劣。
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);
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
}
}
41楼 已删除.
//避免select里面的子查询被识别成字段
$quert = User::find()
->select([
new Expression('count(*) as count , count(distinct mobile) as mnumber')
])->asArray()
->all();
like 查询
$query = User::find()
->where(['LIKE', 'name', $id.'%', false]);
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.'],
如果要用 find_in_set 需要使用到 Expression 表达式：
User::find()
->where(new Expression('FIND_IN_SET(:status, status)'))
->addParams([':status' => 1])
->all();
使用表达式实现计数器：
PackageCardSold::updateAll(
$condition + ['consume_num' => new Expression('`consume_num` + 1'), 'last_consume_item' => $consumerCode->remark, 'updated_at' => time()],
['trade_no' => $consumerCode->trade_no]
);
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
like 左查询：
Table::find()->where(['like', 'name', $_GET['q'] . '%', false]);
查询区间：between
<?php
//Get values and format them in unix timestamp
$start = Yii::$app->formatter->asTimestamp(Yii::$app->request->post('start'));
$end = Yii::$app->formatter->asTimestamp(Yii::$app->request->post('end'));
//Book name from your example form
$bookName = Yii::$app->request->post('book');
//Then you can find in base:
$books = Book::find()
->where(['between', 'date', $start, $end])
->andWhere(['like', 'book', $bookName])
->all();
为空查询
->andWhere(['is', 'activated_at', new \yii\db\Expression('null')]),