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：
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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
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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
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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
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namespace app\models;use \yii\db\ActiveRecord;class User extends ActiveRecord{ public function getRight() { $right = $this->hasOne(Right::className,['id' => 'right_id'])->asArray(); return $right; }} |
\controller\home\actionAbout
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$user = User::findOne(1);$right = $user->user;dd($right);return $this->render('about'); |
join
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//查询关联表的所有数据$user = User->find()->with('right')->asArray()->all(); |
希望本文所述对大家基于Yii框架的PHP程序设计有所帮助。
原文链接：https://blog.csdn.net/qq_42176520/article/details/91391201
