JsonApiBundle For Symfony

JsonApiBundle is a Symfony bundle. It is the fastest way to generate API based on JsonApi
using woohoolabs/yin Library.

Installing

1. Install symfony
   
composer create-project symfony/skeleton YOUR_PROJECT


2. Install the maker bundle
   
composer require symfony/maker-bundle phootwork/collection --dev


3. Install the bundle
   
composer require paknahad/jsonapi-bundle

   For Symfony 4 use:
   
composer require paknahad/jsonapi-bundle:3.0.0


4. Add below line to config/bundles.php

Paknahad\JsonApiBundle\JsonApiBundle::class => ['all' => true],


Usage

1. Use below command to generate entities one by one:
   
bin/console make:entity

   for example, Book and Author entity is as follows:
   ```php
   class Book
   {
   /**
   * @ORM\Id()
   * @ORM\GeneratedValue()
   * @ORM\Column(type="integer")
   */
   private $id;

   /**
    * @ORM\Column(type="string", length=255)
    */
   private $title;
   
   /**
    * @ORM\Column(type="string", length=20, nullable=true)
    */
   private $isbn;
   
   /**
    * @ORM\ManyToMany(targetEntity="App\Entity\Author", inversedBy="books")
    */
   private $authors;
   
   ... 
   

   ```php
   class Author
   {
       /**
        * @ORM\Id()
        * @ORM\GeneratedValue()
        * @ORM\Column(type="integer")
        */
       private $id;
   
       /**
        * @ORM\Column(type="string", length=255)
        * @Assert\NotBlank()
        * @Assert\Length(min=3)
        */
       private $name;
   
       /**
        * @ORM\ManyToMany(targetEntity="App\Entity\Book", mappedBy="authors")
        */
       private $books;
   
       ...
   

2. Generate CRUD API:
   
bin/console make:api


3. You can find the generated "collections" for postman and swagger in the following path and then test the API:
   
collection/postman.json
collection/swagger.yaml


Features

Pagination

http://example.com/books?page[number]=5&page[size]=30

Sorting

• Ascending on name field: http://example.com/books?sort=name
• Decending on name field: http://example.com/books?sort=-name
• Multiple fields: http://example.com/books?sort=city,-name
• Field on a relation: http://example.com/books?sort=author.name

Relationships

http://example.com/books?include=authors

multiple relationships

http://example.com/books?include=authors.phones,publishers


Search

As the JSON API specification does not specify exactly how filtering should work different methods of
filtering can be used. Each method is supplied with a Finder service. Each registered Finder will be able to append
conditions to the search query. If you register multiple Finders they are all active at the same time. This enables
your API to support multiple filtering methods.

Basic Finder.

A basic Finder is included in this library offering simple filtering capabilities:

This request will return all the books that author's name begin with hamid

http://example.com/books?filter[authors.name]=hamid%

Below line has additional condition: books which have "php" in their title.

http://example.com/books?filter[title]=%php%&filter[authors.name]=hamid%


Setting a default filter on the IndexAction

By using $resourceCollection->getQuery() you can get access on the query object.
use "r" alias for referring to the current entity. in this example the "r" refers to the "ProjectEntity"
```php
class ProjectController extends Controller
{
/**
* @Route("/", name="projects_index", methods="GET")
*/
public function index(ProjectRepository $projectRepository, ResourceCollection $resourceCollection): ResponseInterface
{
$resourceCollection->setRepository($projectRepository);

    $resourceCollection->getQuery()->where('r.user_id = :s1')->setParameter(...);
    $resourceCollection->handleIndexRequest();

    return $this->jsonApi()->respond()->ok(
        new ProjectsDocument(new ProjectResourceTransformer()),
        $resourceCollection
    );
}

#### Other Finders
Currently the following Finders are available via other bundles:

- [mnugter/jsonapi-rql-finder-bundle][7] - [RQL][8] based Finder

- [paknahad-jsonapi-querifier-bundle][10] - [Querifier][11] based Finder

#### Creating a custom Finder
A Finder can be registered via a service tag in the services definition. The tag `paknahad.json_api.finder` must be
added to the service for the Finder to be resigered.

Example:

```

Each Finder must implement the Paknahad\JsonApiBundle\Helper\Filter\FinderInterface interface.

Validation

Error on validating associations
json
{
"jsonapi": {
"version": "1.0"
},
"errors": [
{
"detail": "Invalid value for this relation",
"source": {
"pointer": "/data/relationships/authors",
"parameter": "1"
}
}
]
}

Validate attributes if you have defined validators on entities.
json
{
"jsonapi": {
"version": "1.0"
},
"errors": [
{
"detail": "This value is too short. It should have 3 characters or more.",
"source": {
"pointer": "/data/attributes/name",
"parameter": "h"
}
}
]
}


Error handler

All errors such as:
- Internal server error (500)
- Not found (404)
- Access denied (403)

has responses like this:
json
{
"meta": {
"code": 0,
"message": "No route found for \"GET /book\"",
"file": "/var/www/vendor/symfony/http-kernel/EventListener/RouterListener.php",
"line": 139,
"trace": [
{
"file": "/var/www/vendor/symfony/event-dispatcher/EventDispatcher.php",
"line": 212,
"function": "onKernelRequest"
},
{
"file": "/var/www/vendor/symfony/event-dispatcher/EventDispatcher.php",
"line": 44,
"function": "doDispatch"
},
{
"file": "/var/www/vendor/symfony/http-kernel/HttpKernel.php",
"line": 125,
"function": "dispatch"
},
{
"file": "/var/www/vendor/symfony/http-kernel/HttpKernel.php",
"line": 66,
"function": "handleRaw"
},
{
"file": "/var/www/vendor/symfony/http-kernel/Kernel.php",
"line": 188,
"function": "handle"
},
{
"file": "/var/www/public/index.php",
"line": 37,
"function": "handle"
}
]
},
"links": {
"self": "/book"
},
"errors": [
{
"status": "404",
"code": "NO_ROUTE_FOUND_FOR_\"GET_/BOOK\"",
"title": "No route found for \"GET /book\""
}
]
}

NOTICE: the "meta" field gets filled just on development environment.