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();
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