Extbase "findBy" with multiple parameters - typo3

Question

I got an extension in which i want to include some filters, i know figured out that i can filter the results that are shown of my listAction() by using findBy.
I tested it and it worked like this:
$cars = $this->carRepository->findByCarid("1");
$this->view->assign('cars', $cars);
My problem now is i need to filter the result with more than one Parameter, what if i want to add findByColor("blue") so it gives me all cars wit hid 1 and color blue? What solution does extbase have for that kind of search queries? i can`t find anything good or understandable in the documentation.

Answer 1

You have to extend you repository and code this functionality on your own. Extbase offers you a simple but powerful API to do so.
class whatEverYourRepositoryIsCalled extends \TYPO3\CMS\Extbase\Persistence\Repository {
public function findByFilter($carId, $color) {
// Create empty query = select * from table
$query = $this->createQuery();
// Add query options
return $query->matching(
// ALL conditions have to be met (AND)
$query->logicalAnd(
// table column carId must be euqal to $carId
$query->equals('carId', $carId),
// table column color must be euqal to $color
$query->equals('color', $color)
)
);
}
}
This is a quite simple approach to your problem. In a real world scenario I would probably use an array of filter criteria to do the filtering like array('carId' => 1, 'color' => 'blue'). Inside of findByFilter() those values would be extracted and added to the query.
The key is to build the desired query. A quite comprehensive explanation of how to do that can be found at http://blog.typoplanet.de/2010/01/27/the-repository-and-query-object-of-extbase/. Unfortunately it's not completely up to date but the part about constructing queries is still valid.