Как организовать поиск по связанному полю?

Question

[nnkrasovok]

Делаю поиск по связанному полю. соответственно, чтоб нашло категорию у подкатегорий, в поле надо вводить id_category, а не название категории. как это исправить?

модель

class SubcategorySearch extends Subcategory
{
    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['id'], 'integer'],
            [['name', 'category_id'], 'safe'],
            [['name'], 'string', 'max' => 100],
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function scenarios()
    {
        // bypass scenarios() implementation in the parent class
        return Model::scenarios();
    }

    /**
     * Creates data provider instance with search query applied
     *
     * @param array $params
     *
     * @return ActiveDataProvider
     */
    public function search($params)
    {
        $query = Subcategory::find();

        // add conditions that should always apply here

        $dataProvider = new ActiveDataProvider([
            'query' => $query,
        ]);

        $this->load($params);

        if (!$this->validate()) {
            // uncomment the following line if you do not want to return any records when validation fails
             //$query->where('0=1');
            return $dataProvider;
        }

        // grid filtering conditions
        $query->orFilterWhere([
            'id' => $this->id,
            //'category_id' => $this->category_id,
        ])->orFilterWhere(['like', 'name', $this->name])->orFilterWhere(['like', 'category_id', $this->category_id]);

        return $dataProvider;
    }

}

вью

<?php $form = ActiveForm::begin([
        'action' => ['index-subcategory'],
        'method' => 'get'
    ]); ?>


    <?= $form->field($model, 'id') ?>

    <?= $form->field($model, 'category_id') ?>

    <?= $form->field($model, 'name') ?>

    <div class="form-group">
        <?= Html::submitButton('Search', ['class' => 'btn btn-primary']) ?>
        <?= Html::resetButton('Reset', ['class' => 'btn btn-outline-secondary']) ?>
    </div>

    <?php ActiveForm::end(); ?>

Контроллер

public function actionIndexSubcategory()
    {
        $searchModel = new SubcategorySearch();
        $dataProvider = $searchModel->search(\Yii::$app->request->queryParams);

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