页面输出list信息
return $this->render('index', [
'model' => $model,
'cats' => $cats,
'findlist' => $findall,
]);
<?php
$str='';
foreach ($findlist as $k => $list) {
$str= $list['name'].$list['label_img'];
?>
<?= Html::encode($str)?><br>
<?php
}
?>
效果:
333
333
任溶溶
444
上传插件/image/20171125/1511618863693242.jpg
上传插件/image/20171125/1511619675659806.jpg
基础查询
Customer::find()->one(); 此方法返回一条数据; Customer::find()->all(); 此方法返回所有数据; Customer::find()->count(); 此方法返回记录的数量; Customer::find()->average(); 此方法返回指定列的平均值; Customer::find()->min(); 此方法返回指定列的最小值 ; Customer::find()->max(); 此方法返回指定列的最大值 ; Customer::find()->scalar(); 此方法返回值的第一行第一列的查询结果; Customer::find()->column(); 此方法返回查询结果中的第一列的值; Customer::find()->exists(); 此方法返回一个值指示是否包含查询结果的数据行; Customer::find()->batch(10); 每次取10条数据 Customer::find()->each(10); 每次取10条数据,迭代查询 //根据sql语句查询:查询name=test的客户
Customer::model()->findAllBySql("select * from customer where name = test"); //根据主键查询:查询主键值为1的数据
Customer::model()->findByPk(1); //根据条件查询(该方法是根据条件查询一个集合,可以是多个条件,把条件放到数组里面)
Customer::model()->findAllByAttributes(['username'=>'admin']); //子查询
$subQuery = (new Query())->select('COUNT(*)')->from('customer');
// SELECT `id`, (SELECT COUNT(*) FROM `customer`) AS `count` FROM `customer`
$query = (new Query())->select(['id', 'count' => $subQuery])->from('customer'); //关联查询:查询客户表(customer)关联订单表(orders),条件是status=1,客户id为1,从查询结果的第5条开始,查询10条数据
$data = (new Query())
->select('*')
->from('customer')
->join('LEFT JOIN','orders','customer.id = orders.customer_id')
->where(['status'=>'1','customer.id'=>'1'])
->offset(5)
->limit(10)
->all()
直接查询
//createCommand(执行原生的SQL语句)
$sql= "SELECT u.account,i.* FROM sys_user as u left join user_info as i on u.id=i.user_id";
$rows=Yii::$app->db->createCommand($sql)->query(); 查询返回多行:
$command = Yii::$app->db->createCommand('SELECT * FROM post');
$posts = $command->queryAll();
返回单行
$command = Yii::$app->db->createCommand('SELECT * FROM post WHERE id=1');
$post = $command->queryOne();
查询多行单值:
$command = Yii::$app->db->createCommand('SELECT title FROM post');
$titles = $command->queryColumn();
查询标量值/计算值:
$command = Yii::$app->db->createCommand('SELECT COUNT(*) FROM post');
$postCount = $command->queryScalar();
关联查询
/**
*客户表Model:CustomerModel
*订单表Model:OrdersModel
*国家表Model:CountrysModel
*首先要建立表与表之间的关系
*在CustomerModel中添加与订单的关系
*/
Class CustomerModel extends \yii\db\ActiveRecord
{
...
//客户和订单是一对多的关系所以用hasMany
//此处OrdersModel在CustomerModel顶部别忘了加对应的命名空间
//id对应的是OrdersModel的id字段,order_id对应CustomerModel的order_id字段
public function getOrders()
{
return $this->hasMany(OrdersModel::className(), ['id'=>'order_id']);
}
//客户和国家是一对一的关系所以用hasOne
public function getCountry()
{
return $this->hasOne(CountrysModel::className(), ['id'=>'Country_id']);
}
....
}
// 查询客户与他们的订单和国家
CustomerModel::find()->with('orders', 'country')->all(); // 查询客户与他们的订单和订单的发货地址(注:orders 与 address都是关联关系)
CustomerModel::find()->with('orders.address')->all(); // 查询客户与他们的国家和状态为1的订单
CustomerModel::find()->with([
'orders' => function ($query) {
$query->andWhere('status = 1');
},
'country',
])->all();