better entity loading with predefined controller and callback

Author: n3o77

Form/Type/Select2EntityType.php

@@ -167,6 +167,8 @@ public function configureOptions(OptionsResolver $resolver)
                 'autostart' => true,
                 'width' => isset($this->config['width']) ? $this->config['width'] : null,
                 'req_params' => array(),
+                'property' => null,
+                'callback' => null,
             )
         );
     }

Resources/config/services.xml

@@ -11,6 +11,9 @@
             <argument type="service" id="router" />
             <argument>%tetranz_select2_entity.config%</argument>
         </service>
+        <service id="tetranz_select2entity.autocomplete_service" class="Tetranz\Select2EntityBundle\Service\AutocompleteService">
+            <argument type="service" id="service_container" />
+        </service>
     </services>
 
 </container>

Resources/public/js/select2entity.js

@@ -55,7 +55,8 @@
                     },
                     data: function (params) {
                         var ret = {
-                            'q': params.term
+                            'q': params.term,
+                            'field_name': $s2.data('name')
                         };
 
                         var reqParams = $s2.data('req_params');

Resources/views/Form/fields.html.twig

@@ -11,7 +11,8 @@
     'data-page-limit':page_limit,
     'data-scroll':scroll ? 'true' : 'false',
     'data-autostart':autostart ? 'true' : 'false',
-    'class' : (attr.class|default('') ~ ' select2entity form-control')|trim
+    'class' : (attr.class|default('') ~ ' select2entity form-control')|trim,
+    'data-name' : name|e('html_attr')
     }) %}
 
     {% if allow_add.enabled %}

Service/AutocompleteService.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace Tetranz\Select2EntityBundle\Service;
+
+use Doctrine\ORM\EntityRepository;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareTrait;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\Form\FormTypeInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\PropertyAccess\PropertyAccess;
+
+class AutocompleteService implements ContainerAwareInterface
+{
+    use ContainerAwareTrait;
+
+
+    public function __construct(ContainerInterface $container)
+    {
+        $this->setContainer($container);
+    }
+
+    /**
+     * @param Request                  $request
+     * @param string|FormTypeInterface $type
+     *
+     * @return array
+     */
+    public function getAutocompleteResults(Request $request, $type)
+    {
+        $form = $this->container->get('form.factory')->create($type);
+        $fieldOptions = $form->get($request->get('field_name'))->getConfig()->getOptions();
+
+        /** @var EntityRepository $repo */
+        $repo = $this->container->get('doctrine')->getRepository($fieldOptions['class']);
+
+        $term = $request->get('q');
+
+        $countQB = $repo->createQueryBuilder('e');
+        $countQB
+            ->select($countQB->expr()->count('e'))
+            ->where('e.'.$fieldOptions['property'].' LIKE :term')
+            ->setParameter('term', '%' . $term . '%')
+        ;
+
+        $maxResults = $fieldOptions['page_limit'];
+        $offset = ($request->get('page', 1) - 1) * $maxResults;
+
+        $resultQb = $repo->createQueryBuilder('e');
+        $resultQb
+            ->where('e.'.$fieldOptions['property'].' LIKE :term')
+            ->setParameter('term', '%' . $term . '%')
+            ->setMaxResults($maxResults)
+            ->setFirstResult($offset)
+        ;
+
+
+        if (array_key_exists('callback', $fieldOptions)) {
+            $cb = $fieldOptions['callback'];
+
+            $cb($countQB, $request);
+            $cb($resultQb, $request);
+        }
+
+        $count = $countQB->getQuery()->getSingleScalarResult();
+        $paginationResults = $resultQb->getQuery()->getResult();
+
+        $result = ['results' => null, 'more' => $count > ($offset + $maxResults)];
+
+        $accessor = PropertyAccess::createPropertyAccessor();
+
+        $result['results'] = array_map(function ($item) use ($accessor, $fieldOptions) {
+            return ['id' => $accessor->getValue($item, $fieldOptions['primary_key']), 'text' => $accessor->getValue($item, $fieldOptions['property'])];
+        }, $paginationResults);
+
+        return $result;
+    }
+}