Add title filter in admin using LexikFormFilterBundle

app/AppKernel.php

@@ -22,6 +22,7 @@ public function registerBundles()
             new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
             new Knp\Bundle\PaginatorBundle\KnpPaginatorBundle(),
             new CodeExplorerBundle\CodeExplorerBundle(),
+            new Lexik\Bundle\FormFilterBundle\LexikFormFilterBundle(),
             new AppBundle\AppBundle(),
         );
 

app/Resources/views/admin/blog/index.html.twig

@@ -5,6 +5,11 @@
 {% block main %}
     <h1>{{ 'title.post_list'|trans }}</h1>
 
+    <form method="get" action=".">
+        {{ form_rest(form) }}
+        <input type="submit" name="submit-filter" value="Filter" />
+    </form>
+
     <table class="table table-striped">
         <thead>
             <tr>

composer.json

@@ -26,7 +26,8 @@
         "symfony/monolog-bundle"               : "~2.7",
         "symfony/swiftmailer-bundle"           : "~2.3",
         "symfony/symfony"                      : "~2.8",
-        "twig/extensions"                      : "~1.2"
+        "twig/extensions"                      : "~1.2",
+        "lexik/form-filter-bundle": "dev-master"
     },
     "require-dev": {
         "sensio/generator-bundle": "~3.0"

src/AppBundle/Controller/Admin/BlogController.php

@@ -11,6 +11,7 @@
 
 namespace AppBundle\Controller\Admin;
 
+use AppBundle\Filter\PostFilterType;
 use AppBundle\Form\PostType;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
@@ -50,12 +51,29 @@ class BlogController extends Controller
      * @Route("/", name="admin_post_index")
      * @Method("GET")
      */
-    public function indexAction()
+    public function indexAction(Request $request)
     {
-        $entityManager = $this->getDoctrine()->getManager();
-        $posts = $entityManager->getRepository('AppBundle:Post')->findAll();
+        $form = $this->get('form.factory')->create(new PostFilterType());
+
+        // initialize a query builder
+        $filterBuilder = $this->get('doctrine.orm.entity_manager')
+            ->getRepository('AppBundle:Post')
+            ->createQueryBuilder('p');
+
+        if ($request->query->has($form->getName())) {
+            // manually bind values from the request
+            $form->submit($request->query->get($form->getName()));
+
+            // build the query from the given form object
+            $this->get('lexik_form_filter.query_builder_updater')->addFilterConditions($form, $filterBuilder);
+        }
+
+        $posts = $filterBuilder->getQuery()->getResult();
 
-        return $this->render('admin/blog/index.html.twig', array('posts' => $posts));
+        return $this->render('admin/blog/index.html.twig', array(
+            'form' => $form->createView(),
+            'posts' => $posts
+        ));
     }
 
     /**

src/AppBundle/Filter/PostFilterType.php

@@ -0,0 +1,29 @@
+<?php
+namespace AppBundle\Filter;
+
+use Lexik\Bundle\FormFilterBundle\Filter\FilterOperands;
+use Symfony\Component\Form\AbstractType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+class PostFilterType extends AbstractType
+{
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        $builder->add('title', 'filter_text', array(
+            'condition_pattern' => FilterOperands::STRING_CONTAINS));
+    }
+
+    public function getName()
+    {
+        return 'post_filter';
+    }
+
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver->setDefaults(array(
+            'csrf_protection'   => false,
+            'validation_groups' => array('filtering') // avoid NotBlank() constraint-related message
+        ));
+    }
+}