/**
* Возвращает обязательное поле коллекции.
* @param $fieldName
* @throws NonexistentEntityException если поле не существует
* @return IField
*/
protected function getRequiredField($fieldName)
{
if (!$this->metadata->getFieldExists($fieldName)) {
throw new NonexistentEntityException($this->translate('Collection "{collection}" does not contain required field "{name}".', ['collection' => $this->name, 'name' => $fieldName]));
}
return $this->metadata->getField($fieldName);
}
/**
* {@inheritdoc}
*/
public function fields(array $fieldNames = [])
{
foreach ($fieldNames as $fieldName) {
if ($this->metadata->getFieldExists($fieldName)) {
$field = $this->metadata->getField($fieldName);
$this->fields[$fieldName] = $field;
} else {
throw new NonexistentEntityException($this->translate('Cannot select objects. Field "{name}" does not exist.', ["name" => $fieldName]));
}
}
return $this;
}
