FRACTAL + JSON-LD + Hydra REST API system for Symfony

This a work in progress under active development. This bundle relies heavily on the Serializer of Symfony 2.7 and is not usable in production yet.

Here is the fully-featured REST API you'll get in minutes, I promise:

• CRUD support through the API for Doctrine entities: list, GET, POST, PUT and DELETE
• Hypermedia implementing JSON-LD
• Machine-readable documentation in Hydra, guessed from PHPDoc, Serializer, Validator and Doctrine ORM metadata
• Pagination (following the Hydra format)
• List filters (following the Hydra format)
• Validation (through the Symfony Validator Component, supporting groups)
• Errors serialization (following the Hydra format)
• Custom serialization (through the Symfony Serializer Component, supporting groups)
• Automatic routes registration
• Automatic entrypoint generation giving access to all resources
• \DateTime serialization and deserialization
• FOSUserBundle integration

Everything is fully customizable through a powerful event system and strong OOP. This bundle is documented and tested with Behat (take a look at the features/ directory).

If you are starting a new project, the easiest way to get this bundle working and well integrated with other useful tools such as PHP Schema, NelmioApiDocBundle, NelmioCorsBundle or Behat is to install Dunglas's API Platform. It's a Symfony edition packaged with the best tools to develop a REST API and with sensitive settings.

Alternatively, you can use Composer to install the standalone bundle in your project:

composer require dunglas/api-bundle

Then, update your app/config/AppKernel.php file:

    public function registerBundles()
    {
        $bundles = [
            // ...
            new Nelmio\ApiDocBundle\NelmioApiDocBundle()
            new Dunglas\ApiBundle\DunglasApiBundle(),
            new Eliberty\ApiBundle\ElibertyApiBundle(),
            // ...
        ];

        return $bundles;
    }

Register the routes of our API by adding the following lines to app/config/routing.yml:

api:
    resource: "."
    type:     "api"
    prefix:   "/api" # Optional

The first step is to name your API. Add the following lines in app/config/config.yml:

dunglas_api:
    title:              "Your API name"
    description:        "The full description of your API"
    default:                                               # optional
        items_per_page: 30                                 # Number of items per page in paginated collections (optional)
        order:          ~                                  # Default order: null for natural order, ASC or DESC (optional)

# Nelmio API Doc
nelmio_api_doc:
    sandbox:
        accept_type:        "application/json"
        body_format:
            formats:        [ "json" ]
            default_format: "json"
        request_format:
            formats:
                json:       "application/json"

The name and the description you give will be accessible trough the auto-generated Hydra documentation.

Imagine you have the following Doctrine entity classes:

<?php

# src/AppBundle/Entity/Product.php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * @ORM\Entity
 */
class Product
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    public $id;
    /**
     * @ORM\Column
     * @Assert\NotBlank
     */
    public $name;
}

<?php

# src/AppBundle/Entity/Offer.php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * @ORM\Entity
 */
class Offer
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    public $id;
    /**
     * @ORM\Column(type="text")
     */
    public $description;
    /**
     * @ORM\Column(type="float")
     * @Assert\NotBlank
     * @Assert\Range(min=0, message="The price must be superior to 0.")
     * @Assert\Type(type="float")
     */
    public $price;
    /**
     * @ORM\ManyToOne(targetEntity="Product")
     */
    public $product;
}

Register the following services (for example in app/config/services.yml):

services:
    resource.product:
        parent: api.resource
        arguments:
          - AppBundle\Entity\Product
        tags:
          - { name: api.resource }

    resource.offer:
        parent: api.resource
        arguments:
          - AppBundle\Entity\Offer
        tags:
          - { name: api.resource }

you will automatically!

End point GET PUT CPOST CGET DELETE for the entity offer, product

What is Fractal?!

Fractal provides a presentation and transformation layer for complex data output, the like found in RESTful APIs, and works really well with JSON. Think of this as a view layer for your JSON/YAML/etc.

When building an API it is common for people to just grab stuff from the database and pass it to json_encode(). This might be passable for “trivial” APIs but if they are in use by the public, or used by mobile applications then this will quickly lead to inconsistent output.

• Fractal OUTPUT COMPLEX, FLEXIBLE, AJAX/RESTFUL DATA STRUCTURES (in english)

Tansformer!

Create transformer for un resource

<?php

namespace AppBundle\Transformer\V2;

use AppBundle\Entity\Offer;
use Eliberty\ApiBundle\Transformer\BaseTransformer;
use Symfony\Component\Validator\Constraints as Assert;
use Dunglas\ApiBundle\Annotation\Iri;

class OfferTransformer extends BaseTransformer
{

    /**
     * @var string
     */
    protected $currentResourceKey = 'offer';

    /**
     * entity class
     * @var string
     */
    protected $entityClass = 'AppBundle\Entity\Offer';

    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = [];

    /**
     * List of resources possible to embed via this processor.
     *
     * @var array
     */
    protected $availableIncludes = [];

    /**
     * Turn this item object into a generic array.
     * @param Offer $offer
     * @return array
     */
    public function transform(Offer $offer = null)
    {
        if (is_null($offer)) {
            return [];
        }

        $response = [
            "id"        => $offer->getId(),
            "description" => $offer->getDescription(),
        ];

        return $response;
    }
}

<?php

namespace AppBundle\Transformer\V2;

use AppBundle\Entity\Product;
use Eliberty\ApiBundle\Transformer\BaseTransformer;
use Symfony\Component\Validator\Constraints as Assert;
use Dunglas\ApiBundle\Annotation\Iri;
class ProductTransformer extends BaseTransformer
{

    /**
     * @var string
     */
    protected $currentResourceKey = 'product';

    /**
     * entity class
     * @var string
     */
    protected $entityClass = 'AppBundle\Entity\Product';

    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = [];

    /**
     * List of resources possible to embed via this processor.
     *
     * @var array
     */
    protected $availableIncludes = [];

    /**
     * Turn this item object into a generic array.
     * @param Product $product
     * @return array
     */
    public function transform(Product $product = null)
    {
        if (is_null($offer)) {
            return [];
        }

        $response = [
            "id"        => $product->getId(),
            "name"      => $product->getDescription(),
        ];

        return $response;
    }
}

Register the following services (for example in app/config/services.yml):

services:
    transformer.parent.v2:
        abstract:  true
        arguments:
              - @doctrine.orm.entity_manager
        calls:
           - [ setRequest, [ @request ] ]

    transformer.offer.v2:
        class: AppBundle\Transformer\V2\OfferTransformer
        parent: transformer.parent.v2
        tags:
           - { name: api_transformer }
        scope: request

     transformer.product.v2:
         class: AppBundle\Transformer\V2\ProductTransformer
         parent: transformer.parent.v2
         tags:
            - { name: api_transformer }
         scope: request

You're done!

You now have a fully featured API exposing your Doctrine entities. Run the Symfony app (app/console server:run) and browse the API entrypoint at http://localhost:8000/api.

Interact with it using a REST client such as Postman and take a look at the usage examples in the features directory.

Note: NelmioApiDocBundle (dev-master) has built-in support for this bundle. Installing it will give you access to a human-readable documentation and a nice sandbox.

The bundle provides a generic system to apply filters on collections. It ships with built-in Doctrine ORM support and can be extended to fit your specific needs.

By default, all filters are disabled. They must be enabled manually.

If Doctrine ORM support is enabled, adding filters is as easy as adding an entry in your app/config/services.yml file. It supports exact and partial matching strategies. If the partial strategy is specified, a SQL query with a LIKE %text to search% query will be automatically issued.

To allow filtering the list of offers:

services:
    resource.offer.filter.id:
        parent:    "api.doctrine.orm.filter"
        arguments: [ "id" ] # Filters on the id property, allow both numeric values and IRIs

    resource.offer.filter.price:
        parent:    "api.doctrine.orm.filter"
        arguments: [ "price" ] # Extracts all collection elements with the exact given price

    resource.offer.filter.name:
        parent:    "api.doctrine.orm.filter"
        arguments: [ "name", "partial" ] # Elements with given text in their name

    resource.offer:
        parent:    "api.resource"
        arguments: [ "AppBundle\Entity\Offer" ]
        calls:
            -      [ "addFilter", [ "@resource.offer.filter.id" ] ]
            -      [ "addFilter", [ "@resource.offer.filter.price" ] ]
            -      [ "addFilter", [ "@resource.offer.filter.name" ] ]
        tags:      [ { name: "api.resource" } ]

http://localhost:8000/api/offers?price=10 will return all offers with a price being exactly 10. http://localhost:8000/api/offers?name=shirt will returns all offer with a description containing the word "shirt".

Filters can be combined together: http://localhost:8000/api/offers?price=10&name=shirt

It also possible to filter by relations:

services:
    resource.offer.filter.product:
        parent:    "api.doctrine.orm.filter"
        arguments: [ "product" ]

    resource.offer:
        parent:    "api.resource"
        arguments: [ "AppBundle\Entity\Offer"]
        calls:
            -      [ "addFilter", [ "@resource.offer.filter.product" ] ]
        tags:      [ { name: "api.resource" } ]

With this service definition, it is possible to find all offers for the given product. Try the following: http://localhost:8000/api/offers?product=/api/products/12 Using a numeric ID will also work: http://localhost:8000/api/offers?product=12

It will return all offers for the product having the JSON-LD identifier (@id) http://localhost:8000/api/products/12.

Custom filters can be written by implementing the Dunglas\ApiBundle\Api\Filter\FilterInterface interface. Doctrine ORM filters must implement the Dunglas\ApiBundle\Doctrine\Orm\FilterInterface. They can interact directly with the Doctrine QueryBuilder.

Don't forget to register your custom filters with the Dunglas\ApiBundle\Api\Resource::addFilter() method.

By default, Embedding relations is null , if will be configure for the entity into the .

exemple configuration embed into offerTransformer for include product:

<?php

namespace AppBundle\Transformer\V2;

use AppBundle\Entity\Offer;
use Eliberty\ApiBundle\Transformer\BaseTransformer;
use Symfony\Component\Validator\Constraints as Assert;
use Dunglas\ApiBundle\Annotation\Iri;

class OfferTransformer extends BaseTransformer
{

    /**
     * @var string
     */
    protected $currentResourceKey = 'offer';

    /**
     * entity class
     * @var string
     */
    protected $entityClass = 'AppBundle\Entity\Offer';

    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = ['product'];

    /**
     * List of resources possible to embed via this processor.
     *
     * @var array
     */
    protected $availableIncludes = ['product'];

    /**
     * Turn this item object into a generic array.
     * @param Offer $offer
     * @return array
     */
    public function transform(Offer $offer = null)
    {
        if (is_null($offer)) {
            return [];
        }

        $response = [
            "id"        => $offer->getId(),
            "description" => $offer->getDescription(),
        ];

        return $response;
    }

    /**
     * Embed product.
     *
     * @param Orderitem $orderitem
     *
     * @return \League\Fractal\Resource\Item
     */
    public function includeProduct(Offer $offer = null)
    {
        $this->setEmbed('product');

        $product = null !== $offer ? $offer->getProduct() : null;

        $productTransformer = new ProductTransformer($this->getEm());
        $productTransformer
            ->setRequest($this->request);

        return $this->item($product, $productTransformer);
    }
}

#if you have a relation collectionyour declaration looks like

    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = ['products'];

    /**
     * List of resources possible to embed via this processor.
     *
     * @var array
     */
    protected $availableIncludes = ['products'];

    /**
     * Embed Products.
     *
     * Embed product.
     *
     * @return \League\Fractal\Resource\Collection
     */
    public function includeProducts(Offer $offer = null)
    {
        $this->setEmbed('products');

        $productTransformer = new ProductTransformer($this->getEm());
        $productTransformer
            ->setRequest($this->request);

        if (empty($catalog)) {
            return $this->Collection([], $productTransformer);
        }

        $products = $offer->getProducts();

        return $this->paginate($products, $productTransformer);
    }

From a performance point of view, it's sometimes necessary to avoid extra HTTP requests. It is possible to embed related objects (or only some of their properties) directly in the parent response:

    resource.offet:
       parent: api.resource
       arguments:
          - AppBundle\Entity\Offer
       calls:
          - [ addEmbedOperation, [ @resource.offer.collection_operation.embeds_get] ]
       tags:
          - { name: api.resource }

    resource.offer.collection_operation.embeds_get:
        class: Dunglas\ApiBundle\Api\Operation\Operation
        factory_service: api.operation_factory
        factory_method: createCollectionOperation
        arguments:
           - @resource.offer
           - GET
           - /offers/{id}/{embed}
           - ElibertyApiBundle:Resource:cgetEmbed
           - offerts_embeds_get

with this declaration all embed defined into the offer transformer in the section includAvailableEmbed is explosed

and if into you api request you will be view all embed you can add into you request header:

#e-embed-available: 1

if you have an embed with a different name of your resource you can use is your alias to match a resource that embed

#exemple

<?php

namespace AppBundle\Transformer\V2;

use AppBundle\Entity\Offer;
use Eliberty\ApiBundle\Transformer\BaseTransformer;
use Symfony\Component\Validator\Constraints as Assert;
use Dunglas\ApiBundle\Annotation\Iri;

class OfferTransformer extends BaseTransformer
{

    /**
     * @var string
     */
    protected $currentResourceKey = 'offer';

    /**
     * entity class
     * @var string
     */
    protected $entityClass = 'AppBundle\Entity\Offer';

    /**
     * List of resources to automatically include
     *
     * @var array
     */
    protected $defaultIncludes = ['productalias'];

    /**
     * List of resources possible to embed via this processor.
     *
     * @var array
     */
    protected $availableIncludes = ['product'];

    /**
     * Turn this item object into a generic array.
     * @param Offer $offer
     * @return array
     */
    public function transform(Offer $offer = null)
    {
        if (is_null($offer)) {
            return [];
        }

        $response = [
            "id"        => $offer->getId(),
            "description" => $offer->getDescription(),
        ];

        return $response;
    }

    /**
     * Embed Productalias.
     *
     * @param Orderitem $orderitem
     *
     * @return \League\Fractal\Resource\Item
     */
    public function includeProductalias(Offer $offer = null)
    {
        $this->setEmbed('product');

        $product = null !== $offer ? $offer->getProduct() : null;

        $productTransformer = new ProductTransformer($this->getEm());
        $productTransformer
            ->setRequest($this->request);

        return $this->item($product, $productTransformer);
    }
}

    resource.product:
       parent: api.resource
       arguments:
          - AppBundle\Entity\Product
          - ['Productalias']
       tags:
          - { name: api.resource }

#this market also for classes if you use a single table inheritance

• single table inheritance (in english)

    resource.product:
       parent: api.resource
       arguments:
          - AppBundle\Entity\Product
          - ['AppBundle\Entity\ProductChild']
       tags:
          - { name: api.resource }

The built-in controller is able to leverage Symfony's validation groups.

To take care of them, edit your service declaration and add groups you want to use when the validation occurs:

services:
    resource.product:
        parent:    "api.resource"
        arguments: [ "AppBundle\Entity\Product" ]
        calls:     [ [ "initValidationGroups", [ [ "group1", "group2" ] ] ] ]
        tags:      [ { name: "api.resource" } ]

With the previous definition, the validations groups group1 and group2 will be used when the validation occurs.

The bundle provides a powerful event system triggered in the object lifecycle. Here is the list:

• api.retrieve_list (Dunglas\ApiBundle\Event::RETRIEVE_LIST): occurs after the retrieving of an object list during a GET request on a collection.

• api.retrieve (Dunglas\ApiBundle\Event::RETRIEVE_LIST): after the retrieving of an object during a GET request on an item.

• api.pre_create_validation (Dunglas\ApiBundle\Event::PRE_CREATE_VALIDATION): occurs before the object validation during a POST request.
• api.pre_create (Dunglas\ApiBundle\Event::PRE_CREATE): occurs after the object validation and before its persistence during a POST request
• api.post_create (Dunglas\ApiBundle\Event::POST_CREATE): event occurs after the object persistence during POST request

• api.pre_update_validation (Dunglas\ApiBundle\Event::PRE_UPDATE_VALIDATION): event occurs before the object validation during a PUT request.
• api.pre_update (Dunglas\ApiBundle\Event::PRE_UPDATE): occurs after the object validation and before its persistence during a PUT request
• api.post_update (Dunglas\ApiBundle\Event::POST_UPDATE): event occurs after the object persistence during a PUT request

• api.pre_delete (Dunglas\ApiBundle\Event::PRE_DELETE): event occurs before the object deletion during a DELETE request
• api.post_delete (Dunglas\ApiBundle\Event::POST_DELETE): occurs after the object deletion during a DELETE request

Computing metadata used by the bundle is a costly operation. Fortunately, metadata can be computed once then cached. The bundle provides a built-in cache service using APCu. To enable it in the prod environment (requires APCu to be installed), add the following lines to app/config/config_prod.yml:

dunglas_json_ld_api:
    cache: api.mapping.cache.apc

DunglasApiBundle leverages Doctrine Cache to abstract the cache backend. If you want to use a custom cache backend such as Redis, Memcache or MongoDB, register a Doctrine Cache provider as a service and set the cache config key to the id of the custom service you created.

A built-in cache warmer will be automatically executed every time you clear or warmup the cache if a cache service is configured.

JSON-LD allows to define classes and properties of your API with open vocabularies such as Schema.org and Good Relations.

DunglasApiBundle provides annotations usable on PHP classes and properties to specify a related external IRI.

<?php

# src/AppBundle/Entity/Product.php

namespace AppBundle\Entity;

use Dunglas\ApiBundle\Annotation\Iri;

// ...

/**
 * ...
 * @Iri("https://schema.org/Product")
 */
class Product
{
    // ...

    /**
     * ...
     * @Iri("https://schema.org/name")
     */
    public $name;
}

The generated JSON for products and the related context document will now use external IRIs according to the specified annotations:

GET /products/22

{
  "@context": "/contexts/Product",
  "@id": "/product/22",
  "@type": "https://schema.org/Product",
  "name": "My awesome product",
  // other properties
}

GET /contexts/Product

{
    "@context": {
        "@vocab": "http://example.com/vocab#",
        "hydra": "http://www.w3.org/ns/hydra/core#",
        "name": "https://schema.org/name",
        // Other properties
    }
}

An extended list of existing open vocabularies is available on the Linked Open Vocabularies (LOV) database.

By default, the following operations are automatically enabled:

Collection

Item

If you want to disable some operations (e.g. the DELETE operation), you must register manually applicable operations using the operation factory class, Dunglas\ApiBundle\Resource::addCollectionOperation() and Dunglas\ApiBundle\Resource::addCollectionOperation() methods.

The following Resource definition exposes a GET operation for it's collection but not the POST one:

service
    resource.offer:
       parent: api.resource
       arguments:
          - AppBundle\Entity\Offer
       calls:
          - [ addItemOperation, [ @resource.offer.item_operation.get] ]
          - [ addCollectionOperation, [ @resource.offer.collection_operation.get] ]
       tags:
          - { name: api.resource }

    ##item GET
    resource.offer.item_operation.get:
       class:     "Dunglas\ApiBundle\Api\Operation\Operation"
       public:    false
       factory:   [ "@api.operation_factory", "createItemOperation" ]
       arguments: [ "@resource.offer", "GET" ]

    ##collection CGET
    resource.offer.collection_operation.get:
       class:     "Dunglas\ApiBundle\Api\Operation\Operation"
       public:    false
       factory:   [ "@api.operation_factory", "createCollectionOperation" ]
       arguments: [ "@resource.offer", "GET" ]

Sometimes, it can be useful to create custom controller actions. DunglasApiBundle allows to register custom operations for both collections and items. It will register them automatically in the Symfony routing system and will expose them in the Hydra vocab (if enabled).

    resource.product.item_operation.get:
        class:     "Dunglas\ApiBundle\Api\Operation\Operation"
        public:    false
        factory:   [ "@api.operation_factory", "createItemOperation" ]
        arguments: [ "@resource.product", "GET" ]

    resource.product.item_operation.put:
        class:     "Dunglas\ApiBundle\Api\Operation\Operation"
        public:    false
        factory:   [ "@api.operation_factory", "createItemOperation" ]
        arguments: [ "@resource.product", "PUT" ]


    resource.product.item_operation.custom_get:
        class:   "Dunglas\ApiBundle\Api\Operation\Operation"
        public:  false
        factory: [ "@api.operation_factory", "createItemOperation" ]
        arguments:
            -    "@resource.product"               # Resource
            -    [ "GET", "HEAD" ]                 # Methods
            -    "/products/{id}/custom" # Path
            -    "AppBundle:Custom:custom"         # Controller
            -    "my_custom_route"                 # Route name
            -    # Context (will be present in Hydra documentation)
                 "@type":       "hydra:Operation"
                 "hydra:title": "A custom operation"
                 "returns":     "xmls:string"

    resource.product:
        parent:    "api.resource"
        arguments: [ "AppBundle\Entity\Product" ]
        calls:
            -      [ "addItemOperation", [ "@resource.product.item_operation.get" ] ]
            -      [ "addItemOperation", [ "@resource.product.item_operation.put" ] ]
            -      [ "addItemOperation", [ "@resource.product.item_operation.custom_get" ] ]
        tags:      [ { name: "api.resource" } ]

Additionnaly to the default generated GET and PUT operations, this definition will expose a new GET operation for the /products/{id}/custom URL. When this URL is opened, the AppBundle:Custom:custom controller is called.

When the size of your services definition start to grow, it is useful to create custom resources instead of using the default one. To do so, the Dunglas\ApiBundle\Api\ResourceInterface interface must be implemented.

<?php

namespace AppBundle\Api;

use Dunglas\ApiBundle\Api\ResourceInterface;

class MyCustomResource implements ResourceInterface
{
    public function getEntityClass()
    {
        return 'AppBundle\Entity\MyCustomOne';
    }

    public function getItemOperations() {
        return [
            new MyItemOperation();
        ];
    }

    public function getCollectionOperations()
    {
        return [
            new MyCollectionOperation();
        ];
    }

    public function getFilters()
    {
        return [];
    }

    public function getNormalizationContext()
    {
        return [];
    }

    public function getNormalizationGroups()
    {
        return null;
    }

    public function getDenormalizationContext()
    {
        return [];
    }

    public function getDenormalizationGroups()
    {
        return null;
    }

    public function getValidationGroups()
    {
        return null;
    }

    public function getShortName()
    {
        return 'MyCustomOne';
    }
}

The service definition can now be simplified:

services:
    resource.product:
        parent: "api.resource"
        class:  "AppBundle\Api\MyCustomResource"
        tags:   [ { name: "api.resource" } ]

A seen in the Operations section, it's possible to use custom controllers.

Your custom controller should extend the ResourceController provided by this bundle. It provides convenient methods to retrieve the Resource class associated with the current request and to serialize entities in JSON-LD.

Example of custom controller:

<?php

namespace AppBundle\Controller;

use Dunglas\ApiBundle\Controller\ResourceController;
use Symfony\Component\HttpFoundation\Request;

class CustomController extends ResourceController
{
    # Customize the AppBundle:Custom:custom
    public function getAction(Request $request, $id)
    {
        $this->get('logger')->info('This is my custom controller.');

        return parent::getAction($request, $id);
    }
}

DunglasApiBundle works fine with AngularJS. The popular Restangular REST client library for Angular can easily be configured to handle the API format.

Here is a working Restangular config:

'use strict';

var app =
angular.module('myAngularjsApp')
    .config(['RestangularProvider', function(RestangularProvider) {
        // The URL of the API endpoint
        RestangularProvider.setBaseUrl('http://localhost:8000');

        // JSON-LD @id support
        RestangularProvider.setRestangularFields({
            id: '@id'
        });
        RestangularProvider.setSelfLinkAbsoluteUrl(false);

        // Hydra collections support
        RestangularProvider.addResponseInterceptor(function(data, operation, what, url, response, deferred) {
            // Remove trailing slash to make Restangular working
            function populateHref(data) {
                if (data['@id']) {
                    data['href'] = data['@id'].substring(1);
                }
            }

            // Populate href property for the collection
            populateHref(data);

            if ('getList' === operation) {
                var collectionResponse = data['hydra:member'];
                collectionResponse['metadata'] = {};

                // Put metadata in a property of the collection
                angular.forEach(data, function(value, key) {
                    if ('hydra:member' !== key) {
                        collectionResponse.metadata[key] = value;
                    }
                });

                // Populate href property for all elements of the collection
                angular.forEach(collectionResponse, function(value, key) {
                    populateHref(value);
                });

                return collectionResponse;
            }

            return data;
        });
    }])
;

##Versioning

for check the versioning controle beween the different version of the endpoint

you will be insert into you request header:

Accept: application/vnd.eliberty.api.v2+json

will this you call the service transformer.offer.v2

• A la découverte de API Platform (Symfony Paris Live 2015) (in french)
• API-first et Linked Data avec Symfony (sfPot Lille 2015) (in french)

This project has been created by Kévin Dunglas. Sponsored by Les-Tilleuls.coop.