Yii2.0框架模型多表关联查询示例
本文实例讲述了Yii2.0框架模型多表关联查询。分享给大家供大家参考，具体如下：
联表查询–hasMany：
use app\models\User;
$right = Right::findOne(2);
//$user = User::find()- where(['right_id' = $right- attributes['id']])- all();
$user = $right- hasMany(User::className(),['right_id' = 'id'])- all();
//right_id为User::className()表中字段，id为Right::findOne(2)表字段多表关联一对多查询优化
如果多次用到同表相同查询：
\models\Rught.php
namespace app\models;
use \yii\db\ActiveRecord;
class Right extends ActiveRecord
{
public function getUsers()
{
$users = $this- hasMany(User::className(),['right_id' = 'id'])- asArray()p- all();
return $users;
}
}\controller\home\actionAbout
public function actionAbout()
{
$right = Right::findOne(2);
// $users = $right- getRights();
$users = $right- rights;
dd($users);
return $this- render('about');
}多表关联一对一查询
\models\User.php
namespace app\models;
use \yii\db\ActiveRecord;
class User extends ActiveRecord
{
public function getRight()
{
$right = $this- hasOne(Right::className,['id' = 'right_id'])- asArray();
return $right;
}
}\controller\home\actionAbout
$user = User::findOne(1);
$right = $user- user;
dd($right);
return $this- render('about');join
//查询关联表的所有数据
$user = User- find()- with('right')- asArray()- all();本文参与?腾讯云自媒体分享计划，分享自作者个人站点/博客。
原始发表：2020-09-11
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