gistfile1.php

public function afterValidate()
{
    $schema = static::getTableSchema();

    foreach ($this->attributes as $attribute => $value) {
        if (!$this->hasErrors($attribute)) {
            $typecasted = $schema->getColumn($attribute)->phpTypecast($value);

            if ($value !== $typecasted) {
                $this->setAttribute($attribute, $typecasted);
            }
        }
    }

    return parent::afterValidate();
}