yii2 validating array of inputs

Question

I have following data :

Array
(
    [category] => Array
        (
            [0] => d
            [1] => 100
            [2] => 100
            [3] => 100
        )

    [volume] => Array
        (
            [0] => 100
            [1] => 100
            [2] => 100
        )

    [urgency] => Array
        (
            [0] => 100
            [1] => 100
            [2] => 100
        )

    [importance] => Array
        (
            [0] => 100
            [1] => 100
            [2] => 100
        )
)

And I created DynamicModel for it with rules "each value should be integer" (added in 2.0.4).

$view_model = DynamicModel::validateData(compact('category', 'volume', 'urgency', 'importance'), [
        [['category', 'volume', 'urgency', 'importance'], 'each', 'rule' => ['integer']],
    ]);

In view I have:

    <?= $form->field($model, 'category[0]')->textInput() ?>
    <?= $form->field($model, 'category[1]')->textInput() ?>
    <?= $form->field($model, 'category[2]')->textInput() ?>
    ...
    <?= $form->field($model, 'importance[2]')->textInput() ?>

Problem is, when I submit form with "d" in first input, I have errors on each "category" input:

What I do wrong?

Answer 1

You can use Each validator Info: This validator has been available since version 2.0.4.

[
    // checks if every category ID is an integer
    ['categoryIDs', 'each', 'rule' => ['integer']],
]

This validator only works with an array attribute. It validates if every element of the array can be successfully validated by a specified validation rule. In the above example, the categoryIDs attribute must take an array value and each array element will be validated by the integer validation rule.

rule: an array specifying a validation rule. The first element in the array specifies the class name or the alias of the validator. The rest of the name-value pairs in the array are used to configure the validator object.
allowMessageFromRule: whether to use the error message returned by the embedded validation rule. Defaults to true. If false, it will use message as the error message.

Note: If the attribute value is not an array, it is considered validation fails and the message will be returned as the error message.