Symfony2; How to pass an array as a parameter to a controller action?

Question

How to pass an array as a parameter to a controller action using Symfony 2? Could you write an example of how to define a route that contains an unknown length array as a parameter. For example, url: http: // localhost: 8000 / blog / post /? Tags = [tag1, tag2, tag3] , where the number of tags varies from 0 to 100. There is also an example controller for this route, where the action returns the values ​​of the tag array.

Using the following encoding (see routing.yml and controller.php below), I get an error message:

Catchable Fatal Error: Argument 3 passed to Symfony\Component\Routing\Route::__construct() must be of the type array, string given, called in C:\Bitnami\wampstack-5.5.30-0\sym_prog\dctr\vendor\symfony\symfony\src\Symfony\Component\Routing\Loader\YamlFileLoader.php on line 147 and defined in C:\Bitnami\wampstack-5.5.30-0\sym_prog\dctr\app/config\routing.yml (which is being imported from "C:\Bitnami\wampstack-5.5.30-0\sym_prog\dctr\app/config/routing_dev.yml"). 

URL:

 http://localhost:8000/blog/post/tag1 http://localhost:8000/blog/post/tag1/tag2/tag3/tag4 http://localhost:8000/blog/post/?tags=[tag1,tag2] 

Below are the various combinations of routing and controller files that I have tried so far:

// version r1, routing.yml

 blog_post_tags: path: blog/post/{tags} defaults: { _controller: DefaultController:list_postsByTagActionQ } requirements: tags : "[a-zA-Z0-9,]+" 

// r2 version, routing.yml

 blog_post_tags: resource: "@BlogBundle/Controller/" type: annotation prefix: /blog/ defaults: { _controller: DefaultController:list_postsByTagActionQ } 

// version r1,2-c1, controller.php

 //http://localhost:8000/blog/post/?tags=[tag1,tag2] . /** * @Route("/posts/{tags}") * @Template() */ public function list_postsByTagAction($tags){ var_dump($tags); return array('posts'=>['post1','post2']); } 

// version r1,2-c2, controller.php

 //url http://localhost:8000/blog/post/?tags=[tag1,tag2] /** * @Route("/posts/{tags}") * @Method("GET") * @Template() */ public function list_postsByTagActionQ1(Request $request){ $tags=$request->query->get('tags'); // get a $_GET parameter var_dump($tags); return array('posts'=>['post1','post2']); } 

// version r1,2-c3, controller.php

 //url http://localhost:8000/blog/post/?tags=[tag1,tag2] /** * @Route("/posts/{tags}") * @Method("GET") * @Template() */ public function list_postsByTagActionQ3(Request $request, $tags){ var_dump($tags); return array('posts'=>['post1','post2']); } 

// version r3, routing.yml

 blog_post_tags: path: blog/post/{tags} defaults: { _controller: DefaultController:list_postsByTagActionQ } 

// version r3-c4, controller.php

 //url http://localhost:8000/blog/post/?tags=[tag1,tag2] public function list_postsByTagActionQ(Request $request){ $tags=$request->query->get('tags'); // get a $_GET parameter var_dump($tags); } 

Answer 1

Well, after some attempts, I found the following solution.

You can change your routing pattern to this (tags: "[a-zA-Z0-9 /] +" ):

 blog_post_tag: path: blog/post/{tags} defaults: { _controller: DefaultController:list_postsByTagActionQ } requirements: tags : "[a-zA-Z0-9\/]+" 

You can then pass http: // localhost: 8000 / blog / post / tag1 / tag2 / tag3 / tag4 , but you still need explode () to get the parameters.

Answer 2

Finally, I found the answer. Instead of passing an array, it's better to encode it in a json string. Here is an example:

C: \ Bitnami \ wampstack-5.5.30-0 \ sym_prog \ proj3_27 \ SRC \ MeetingBundle \ Controller \ UserController.php

 .. /** * Displays a form to edit an existing User entity. * * @Route("/{id}/edit", name="user_edit") * @Method({"GET", "POST"}) */ public function editAction(Request $request, User $user) { .. $bredArr=array( 'user_edit' => array ( 'id'=>$user->getId() ) ); .. return $this->render( 'MeetingBundle::user/edit.html.twig', array( 'user' => $user, 'edit_form' => $editForm->createView(), 'image_form' => $imageForm->createView(), 'delete_form' => $deleteForm->createView(), 'bredArr'=>$bredArr, )); 

C: \ Bitnami \ wampstack-5.5.30-0 \ sym_prog \ proj3_27 \ Src \ MeetingBundle \ Controller \ ImageController.php ..

  /** * Deletes a Image entity without displaying forms. nf = no forms * * @Route("/{id}/deletenf/{bredArrJ}", name="image_deletenf") * @Method("GET|POST") */ public function deletenfAction(Request $request, $id, $bredArrJ) { $bredArr=json_decode($bredArrJ, $assoc = true); $em = $this->getDoctrine()->getManager(); $entity = $em->getRepository('MeetingBundle:Image')->find($id); if (!$entity) { throw $this->createNotFoundException('Unable to find Image entity.'); } $em->remove($entity); $em->flush(); if(array_key_exists('image_delete', $bredArr)) { return $this->redirect($this->generateUrl('image_index')); } else if (array_key_exists('user_edit', $bredArr)){ return $this->redirect( $this->generateUrl('user_edit', array( 'id'=>$bredArr['user_edit']['id'] ) ) ); } else if { //redirect to other pages according key in $bredArr } } 

C: \ Bitnami \ wampstack-5.5.30-0 \ sym_prog \ proj3_27 \ src \ MeetingBundle \ Resources \ views \ user \ edit.html.twig

 {# dispplays user, user_delete and image uplaod forms, also shows images which belongs to user, retrieving them via ManyToMany realation in User entity field "imgsuni" #} {% for img in user.imgsuni %} <br> {% include 'MeetingBundle:user:userimg.html.twig' %} {% endfor %} 

C: \ Bitnami \ wampstack-5.5.30-0 \ sym_prog \ proj3_27 \ Src \ MeetingBundle \ Resources \ Views \ User \ userimg.html.twig

 <img src="{{ asset( 'bundles/meeting/images/uploads/'~img.path~'' ) }}" height="100" /> <br><a href="{{ path('image_deletenf', { 'id': img.id, 'bredArrJ' : bredArr|json_encode }) }}"> Delete image </a> "{{ img.title }}". 

$ bredArr is a variable created in the User controller edit_user . It is used as an argument in the image_deletenf path image_deletenf . I don't know how to pass it as an array, but it works if encoded as a Json string. I need an image_deletenf action to be able to redirect paths where I want. I can remove images from user objects, events and comments, so after deleting I would like to return to the user, event or comment, not the default image_index, so I need this $bredArr to direct to the correct object with the correct parameters.