Yii2 active record model not saving data

Question

I\'ve built a simple form model & view, a simple AR model, and a simple controller. The form model assigns the correct values to the AR instance, but when I call save(),

Answer 1

How to Troubleshoot

First thing you should add while developing to your _form.php is errorSummary():

// Some input fields
...
errorSummary($model); ?> // <--- Add this 
...
 

Simplify

Why not use scenarios instead if there is some minimal variation form to form:

In your model:

    public function rules()
    {
        return [
            [['field_1'], 'required', 'on' => self::SCENARIO_ADD],  // only on add
            [['field_2'], 'required', 'on' => self::SCENARIO_UPDATE], // only on update
            [['field_3', 'field_4'], 'required'], // required all the time
        ];
    }

In your controller:

public function actionAdd()
{
    $model = new Model();
    $model->scenario = Model::SCENARIO_ADD;
    if ($model->load(Yii::$app->request->post())) {
        return $this->redirect(['view', 'id' => $model->id]);
    }

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

Behaviors

Alternatively, rather than assign the user directly in your model, you could use a behavior like so:

https://www.yiiframework.com/doc/api/2.0/yii-behaviors-blameablebehavior

/**
 * {@inheritdoc}
 */
public function behaviors()
{
    return [
        [
            'class' => \yii\behaviors\BlameableBehavior::className(),
            'value' => Yii::$app->user->identity->username,
        ],
        [
            'class' => \yii\behaviors\TimestampBehavior::className(),
            'value' => new \yii\db\Expression('NOW()'),
        ],
        [
            'class' => 'sammaye\audittrail\LoggableBehavior',
            'userAttribute' => 'updated_by', //blameable attribute of the current model.
            'ignored' => ['updated_by', 'updated_at'], // This ignores fields from a selection of all fields, not needed with allowed
        ],
    ];
}