Create checkboxlist, write or update, value 1 and 0 in db?

Question

Yii

Hello. I can't solve the problem with checkboxlist. the display is ok.
view:

<?php $form = ActiveForm::begin([
        'id' => 'form-input-example',
        ],
    ]) ?>
    <?= $form->field($model, 'status_id')
        ->checkboxList(ArrayHelper::map(Blog::find()->all(), 'id', 'status_id')) ?>
    <?= Html::submitButton('Сохранить', ['class' => 'btn btn-primary']) ?>
    <?php ActiveForm::end(); ?>

BlogController:

public function actionTests()
    {
        $model = new Blog();

        $model->status_id = Blog::find()->where('status_id')->all();

        if ($model->load(Yii::$app->request->post()) && $model->save())
        {
// Сделать что-то после записи, например SetFlash

        }

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

Blog(Model):

public function rules()
    {
        return [
            ['status_id', 'safe'],
        ];
    }

Test DB

How to write or update an existing value? Through set and get?
I read the documentation, but I still can't understand how the checkboxlist is implemented.
Help me implement this functionality))