在EasyAdmin 3中使用自动完成功能实现CollectionField

fields:
    - { property: 'relatedEntities', type: 'collection' }

fields:
    - { property: 'relatedEntities', type: 'collection', autocomplete: true }

fields:
    - { property: 'relatedEntities', type: 'collection', autocomplete: true, autocompleteRoute: 'autocomplete_route' }

autocomplete_route:
    path: '/autocomplete'
    controller: 'App\Controller\AutocompleteController::index'
    methods: ['GET']

namespace App\Controller;

use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;

class AutocompleteController
{
    /**
     * @Route("/autocomplete", name="autocomplete_route")
     */
    public function index(Request $request): JsonResponse
    {
        // 处理自动完成功能的逻辑，根据输入内容返回匹配的选项

        $input = $request->query->get('input');

        // 根据输入内容查询匹配的选项
        $options = $this->getMatchingOptions($input);

        return new JsonResponse($options);
    }

    private function getMatchingOptions(string $input): array
    {
        // 查询匹配的选项的逻辑

        // 返回匹配的选项
        return ['option1', 'option2', 'option3'];
    }
}