Symfony - 查找具有多对多关系的实体对象

Question

我正在制作一个表单，通过三个参数搜索用户：

-类别-子类别（多选）-省

用户实体具有与类别的关系，以及与其他参数的关系。如果我只想按分类查找，我想我必须使用以下代码：

$users = $em->getRepository('CASUsuariosBundle:Artist')->findByCategory($category);

但是我如何使用其他参数来做到这一点呢？特别是对于子类别，这是一个多项选择。

用户实体：

/**
 * @ORMManyToOne(targetEntity="CASEventBundleEntityCategory", inversedBy="artists")
 * @ORMJoinColumn(name="category_id", referencedColumnName="id")
*/
private $category;
/**
 * @ORMManyToMany(targetEntity="CASEventBundleEntitySubcategory", inversedBy="artists")
 * @ORMJoinTable(name="artists_subcategories",
 *      joinColumns={@ORMJoinColumn(name="artist_id", referencedColumnName="id")},
 *      inverseJoinColumns={@ORMJoinColumn(name="subcategory_id", referencedColumnName="id")}
 *      )
*/
private $subcategories;
/**
 * @ORMManyToMany(targetEntity="CASEventBundleEntityProvince", inversedBy="artists")
 * @ORMJoinTable(name="artists_provinces",
 *      joinColumns={@ORMJoinColumn(name="artist_id", referencedColumnName="id")},
 *      inverseJoinColumns={@ORMJoinColumn(name="province_id", referencedColumnName="id")}
 *      )
 */
 protected $provinces;

搜索控制器：

public function searchAction(Request $request) {
    $search = new Search();
    $em = $this->getDoctrine()->getManager();
    $form = $this->createForm(new SearchType($this->getDoctrine()->getManager()), $search);
    $form->setData($search);
    $form->handleRequest($request);
    if ($form->isValid() || $form->isSubmitted()) {
        $category = $form->get('category')->getData();
        $subcategories = $form->get('subcategories')->getData();
        $province = $form->get('province')->getData();
        return $this->showAction($category, $subcategories, $province);
    }
    return $this->render('CASUsuariosBundle:Profile:search.html.twig', array(
        'form' => $form->createView()
    ));
}
public function showAction($category, $subcategories, $province) {
    return $this->render('CASUsuariosBundle:Profile:search_results.html.twig');
}

Answer 1

你应该能够做到

$users = $em->getRepository('CASUsuariosBundle:Artist')->findBy([
    'category' => $categories,
    'province' => $province,
    //...
]);

如果你想要更多的控制权，你可以随时创建一个QueryBuilder，让你伪造自己的教义请求：

来自symfony文档：

$em = $this->getDoctrine()->getManager();
$query = $em->createQuery(
    'SELECT p
    FROM AppBundle:Product p
    WHERE p.price > :price
    ORDER BY p.price ASC'
)->setParameter('price', 19.99);
$products = $query->getResult();

供参考：http://symfony.com/doc/current/doctrine.html#querying-for-objects-with-dqlhttp://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/query-builder.html