其他表的用户名通过外键

问题描述

第一张桌子： user_id-主键 用户名 密码

第二张表： user_equip_id-主键 phone_model phone_model_series phone_date_acq nb_sg_model nb_sg_date_acq display_model display_series display_date_acq user_for_id-表1中指向user_id的外键

我希望当我看到设备与用户名相关联时，但是当我去查看它时，它说未设置，即使我已经在模型中创建了函数getUsername。我不知道如何从外键关联的第一个表中获取用户名。如果您能提供任何帮助，我非常感谢。

控制器：

pip install PySoundFile

型号：

<?php

namespace app\controllers;

use Yii;
use app\models\Equipment;
use app\models\EquipmentSearch;
use yii\web\Controller;
use yii\web\NotFoundHttpException;
use yii\filters\VerbFilter;

/**
 * EquipmentController implements the CRUD actions for Equipment model.
 */
class EquipmentController extends Controller
{
    /**
     * {@inheritdoc}
     */
    public function behaviors()
    {
        return [
            'verbs' => [
                'class' => VerbFilter::className(),'actions' => [
                    'delete' => ['POST'],],];
    }

    /**
     * Lists all Equipment models.
     * @return mixed
     */
    public function actionIndex()
    {
        $searchModel = new EquipmentSearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

        return $this->render('index',[
            'searchModel' => $searchModel,'dataProvider' => $dataProvider,]);
    }

    /**
     * Displays a single Equipment model.
     * @param integer $id
     * @return mixed
     * @throws NotFoundHttpException if the model cannot be found
     */
    public function actionView($id)
    {
        return $this->render('view',[
            'model' => $this->findModel($id),]);
    }

    /**
     * Creates a new Equipment model.
     * If creation is successful,the browser will be redirected to the 'view' page.
     * @return mixed
     */
    public function actionCreate()
    {
        $model = new Equipment();

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view','id' => $model->user_equip_id]);
        }

        return $this->render('create',[
            'model' => $model,]);
    }

    /**
     * Updates an existing Equipment model.
     * If update is successful,the browser will be redirected to the 'view' page.
     * @param integer $id
     * @return mixed
     * @throws NotFoundHttpException if the model cannot be found
     */
    public function actionUpdate($id)
    {
        $model = $this->findModel($id);

        if ($model->load(Yii::$app->request->post()) && $model->save()) {
            return $this->redirect(['view','id' => $model->user_equip_id]);
        }

        return $this->render('update',]);
    }

    /**
     * Deletes an existing Equipment model.
     * If deletion is successful,the browser will be redirected to the 'index' page.
     * @param integer $id
     * @return mixed
     * @throws NotFoundHttpException if the model cannot be found
     */
    public function actionDelete($id)
    {
        $this->findModel($id)->delete();

        return $this->redirect(['index']);
    }

    /**
     * Finds the Equipment model based on its primary key value.
     * If the model is not found,a 404 HTTP exception will be thrown.
     * @param integer $id
     * @return Equipment the loaded model
     * @throws NotFoundHttpException if the model cannot be found
     */
    protected function findModel($id)
    {
        if (($model = Equipment::findOne($id)) !== null) {
            return $model;
        }

        throw new NotFoundHttpException('The requested page does not exist.');
    }
}

查看：

<?php

namespace app\models;

use Yii;

/**
 * This is the model class for table "equipment".
 *
 * @property int $user_equip_id
 * @property string|null $phone_model
 * @property string $phone_series
 * @property string $phone_date_acq
 * @property string $nb_sg_model
 * @property string $nb_sg_series
 * @property string $nb_sg_date_acq
 * @property string $display_model
 * @property string $display_series
 * @property string $display_date_acq
 * @property int $user_for_id
 *
 * @property User $userFor
 */
class Equipment extends \yii\db\ActiveRecord
{
    /**
     * {@inheritdoc}
     */
    public static function tableName()
    {
        return 'equipment';
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['phone_series','phone_date_acq','nb_sg_model','nb_sg_series','nb_sg_date_acq','display_model','display_series','display_date_acq','user_for_id'],'required'],[['phone_date_acq','display_date_acq'],'safe'],[['user_for_id'],'integer'],[['phone_model','phone_series','display_series'],'string','max' => 50],'exist','skipOnError' => true,'targetClass' => User::className(),'targetAttribute' => ['user_for_id' => 'user_id']],[['username'],'targetAttribute' => ['username' => 'username']],];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'user_equip_id' => 'User Equip ID','phone_model' => 'Phone Model','phone_series' => 'Phone Series','phone_date_acq' => 'Phone Date Acq','nb_sg_model' => 'Nb Sg Model','nb_sg_series' => 'Nb Sg Series','nb_sg_date_acq' => 'Nb Sg Date Acq','display_model' => 'Display Model','display_series' => 'Display Series','display_date_acq' => 'Display Date Acq','user_for_id' => 'User For ID','username' => 'Username',];
    }

    /**
     * Gets query for [[UserFor]].
     *
     * @return \yii\db\ActiveQuery|yii\db\ActiveQuery
     */
    public function getUserFor()
    {
        return $this->hasOne(User::className(),['user_id' => 'user_for_id']);
    }
    
    public function getUsername()
    {
        return $this->hasOne(User::className(),['username' => 'username']);
    }

    /**
     * {@inheritdoc}
     * @return EquipmentQuery the active query used by this AR class.
     */
    public static function find()
    {
        return new EquipmentQuery(get_called_class());
    }
}

解决方法

您的getUsername()方法暗示username和equipment表中存在外键user，这是不正确的。

要获得username的用户，请使用您已经设置的关联方法：

$equipment->userFor->username;

userFor调用getUserFor()并返回可以从中获得username的关系模型。

在GridView中，您可以使用userFor.username在网格上获取此值。

我可以看到您已经在设备规则中设置了username，这暗示着您在创建或更新模型时希望将其传递给模型-因为这不是设备领域，所以不会使设备与用户建立联系没有多余的代码，您需要先准备。