获取Yii2中extraFields的所有属性

<?php

namespace app\models;

use yii\db\ActiveRecord;

class MyModel extends ActiveRecord
{
    public function behaviors()
    {
        return [
            'extraFields' => [
                'class' => \yii\behaviors\ExtraFieldsBehavior::class,
                'extraFields' => [
                    'relatedModel' => ['attribute1', 'attribute2'],
                    'anotherRelatedModel' => ['attribute3', 'attribute4'],
                ],
            ],
        ];
    }
}

// 获取extraFields的所有属性
$extraFields = MyModel::find()->extraFields;

// 输出extraFields的所有属性
foreach ($extraFields as $relatedModel => $attributes) {
    echo "关联模型: $relatedModel\n";
    echo "属性: " . implode(', ', $attributes) . "\n";
    echo "\n";
}