Yii2 multiple forms in a single action

Question

Which is the right way to handle multiple forms in a single action?

Here is my models/MembersBans.php

Answer 1

Id in ActiveForm does't mean id in $_POST. You should use:

$membersBans->load(Yii::$app->request->post())

or

$membersBans->load(Yii::$app->request->post('MembersBans'))

for load attributes from form.

For example multiple forms from CeBe (http://www.yiiframework.com/forum/index.php/topic/53935-solved-subforms/page__p__248184#entry248184)

public function actionCreate()
{   
    $user = new User;
    $profile = new Profile;

    if ($user->load(Yii::$app->request->post()) && $profile->load(Yii::$app->request->post()) && Model::validateMultiple([$user, $profile])) {

        $user->save(false); // skip validation as model is already validated
        $profile->user_id = $user->id; // no need for validation rule on user_id as you set it yourself
        $profile-save(false); 

        return $this->redirect(['view', 'id' => $user->id]);
    } else {
        return $this->render('create', [
            'user' => $user,
            'profile' => $profile,
        ]);
    }
}

In your action you use one model. I think you should extends MembersBans to MembersBansIp class. And your action:

public function actionList() {
    $membersBans = new MembersBans();
    $membersBansIp = new MembersBansIp();
    if ($membersBans->load(Yii::$app->request->post())) {
        $membersBans->banMember();
    }
    if ($membersBansIp->load(Yii::$app->request->post())) {
        $membersBansIp->banIp();
    }
    return $this->render('list', [
                'membersBans' => $membersBans,
                'membersBansIp' => $membersBansIp,
    ]);
}

In view:

<?php
    $activeForm = ActiveForm::begin([
            'id' => 'banMember',
])
?>

    <?= $activeForm->field($membersBans, 'fieldMembersBans') ?>
    <?= Html::submitButton('Login', ['class' => 'btn btn-primary']) ?>
    <?php ActiveForm::end() ?>
<?php
    $activeForm = ActiveForm::begin([
            'id' => 'banMemberIp',
])
?>

    <?= $activeForm->field($membersBansIp, 'usernameMembersBansIp') ?>
    <?= Html::submitButton('Login', ['class' => 'btn btn-primary']) ?>
    <?php ActiveForm::end() ?>

EDIT

I put your code. He is work. https://yadi.sk/i/y7PkwGUPekjPD https://yadi.sk/i/h8dCYQz3ekk2B

But I change controller to this

$membersBans = new MembersBans();
        if ($membersBans->load(Yii::$app->request->post())) {
            $membersBans->banMember();
        }
        if ($membersBans->load(Yii::$app->request->post())) {
            $membersBans->banIp();
        }

And in model change Members to User, because I have not Members objects:

$memberInfo = User::findByUsername($this->username);
        if ($memberInfo) {
            $this->ban_memberid = $memberInfo->id;

Resume: your code is worked. Change controller, how I written up.