Question

我有5张桌子：主，区域，服务， master_service， master_region。

在Master模型中添加getter：

public function getServices(){
    return $this->hasMany(Service::className(), ['id' => 'service_id'])
    ->viaTable(MasterService::tableName(), ['master_id' => 'id']);
}
public function getRegions(){
    return $this->hasMany(Region::className(), ['id' => 'region_id'])
    ->viaTable(MasterRegion::tableName(), ['master_id' => 'id']);
}

一切正常！但是当service.id = 1，region.id = 1时，我无法实现搜索条件，例如，选择所有主服务器。请帮助怎么做“很好”意味着yii2

Answer 1

如果你使用Master getServices应该

public function getServices(){
    return $this->hasMany(Service::className(), ['id' => 'service_id']);
}

然后$master->getServices()返回ActiveQuery，您可以将其用于更高级的query

Answer 2

试试：

Master::find()->innerJoinWith([
'services' => function ($query) use ($serviceId) {
        $query->where(['service.id' => $id]);
    },
'regions' => function ($query) use ($regionId) {
        $query->where(['region.id' => $regionId]);
    }
])->all();

请参阅文档https://github.com/yiisoft/yii2/blob/master/docs/guide/db-active-record.md#joining-with-relations-

Answer 3

谢谢大家。我试过了

$model   = Master::find()->joinWith(['services', 'regions'])->where(['service.id'=>$service_id, 'region.id'=>$region_id])->all();

它的作品！

yii2 AR通过2个相对表找到

3 个答案: