Yii2设置模型数组中所有模型的属性值

Is there a way in yii2 to set one specific attribute value in all models in an array of models (of the same class)? I have searched but unfortunately found nothing relevant. Thanks in advance!

You can use Model::loadMultiple( $models, $data, $formName = null );

This is an example of how you can do that:

$numberOfModelsInArray = sizeof($myDataArray);
$myModels = [];
for ($i = 0; $i < $numberOfModelsInArray; $i++) {
     $myModels[] = new myModelForm();
}

VariantsForm::loadMultiple($myModels, $myDataArray, '');

To know more about loadMultiple() you can check https://www.yiiframework.com/doc/api/2.0/yii-base-model#loadMultiple()-detail for the documentation

Instead of a classical foreach loop you can also use array_walk:

\array_walk($carArray, function(&$car) { $car->engine = 'electric'; });

Another way would be to use Model::loadMultiple with a repeated array:

Model::loadMultiple(
    $carArray,
    \array_fill(0, count($carArray), ['engine' => 'electric']),
    ''
);

The last parameter is an empty string to make Yii expect the exact structure of the second parameter.

Outdated after clarification:

There is a static method on ActiveRecord called updateAll:

Car::updateAll(['engine' => 'electric'], ['manufacturer' => 'Tesla']);
// UPDATE car SET engine = 'electric' WHERE 'manufacturer' = 'Tesla'

This will set the engine attribute of all cars manufactured by Tesla to 'electric'. If you do not specify the condition in the second argument, all cars will get updated.

If you absolutely need to do this for a processed array, you could map the primary key values and pass those as a value instead. Your condition will then be turned into a WHERE id IN(...).

$carArray = [$car1, $car2, $car3];
$carArrayIds = \array_map(function ($car) {
    return $car->id;
}, $carArray);

Car::updateAll(['engine' => 'electric'], ['id' => $carArrayIds]);
// UPDATE car SET engine = 'electric' WHERE 'id' IN (1, 2, 3)

And, last but not least, if none of this is possible, try updating all the models in a single database transaction.

$transaction = Yii::$app->db->beginTransaction();
try {
    foreach ($carArray as $car) {
        $car->engine = 'electric';
        if ($car->update() !== 1) {
            throw new \RuntimeException('Single car update failed');
        }
    }
} catch (\Exception $e) {
    $transaction->rollback();
}