Drupal8 for Symfony Developers

Drupal8 modernization (new object-oriented base) and adoption of many Symfony components is a huge step in connecting these two amazing communities and amazing projects. Drupal8 is not powered by full-stack Symfony and there is still many differences between these two relatives, but still, Symfony developers should master it easily.

This talk is for Symfony developers who don't have experience with Drupal8. It will guide you through routing, controllers, hooks, events, Drupal Console, DI and many other interesting elements that power Drupal8 under the hood. It will also show how to build custom modules Symfony way.

Transcript

1. Drupal8 for Symfony Developers Antonio Perić-Mažar
 17.02.2017 @ #phpuk
2. @antonioperic About me • Antonio Perić-Mažar, mag. ing. comp. • CEO, Co-Founder @ Locastic • Co-Founder @ Shift Conference • Software developer, Symfony2 • Open Source Contributor • SFUGCRO
 • www.locastic.com • antonio@locastic.com • @antonioperic
3. @antonioperic Locastic • We help clients create amazing web and mobile apps (since 2011) • design and development agency • mobile development • web development • UX/UI • Training and Consulting • Shift Conference, Symfony Croatia • www.locastic.com • @locastic
4. @antonioperic Inside Locastic
5. @antonioperic Almost 25% of our team are women
6. @antonioperic Questions? • Any Drupal experts/developers here? • Symfony developers? • Symfony developers without Drupal knowledge
7. @antonioperic Drupal 101 for SF developers
8. @antonioperic Before we start, small disclaimer
9. @antonioperic My world is Symfony (still)
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12. @antonioperic What this means • Drupal8 doesn’t use full stack Symfony, it uses components (maybe in future) • Moving Drupal to modern stack • Building powerful CMS on top of Symfony components • Connecting two big communities • More learning for Drupal developers (OOP, Symfony, new concepts)
14. @antonioperic Who is it for? • Content strategist • Site Administrators • Content editors • “Build stuff without writing code” • Professional developers • Bespoke applications • “Make writing code easier”
15. @antonioperic In Drupal 8 there's three different types of knowledge that you're going to be using in order to work with it effectively.
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20. @antonioperic Symfony2 Framework Bundle Symfony2 Bundles Symfony2 CMF Bundles Symfony2 Components Partnered Libs (twig, etc.) CMF Components Symfony fullstack Drupal 8 Distribution Drupal Core Modules Drupal Contrib Modules Drupal Core Libraries Symfony2 Components Partnered Libs (twig, etc.) Drupal Components
21. @antonioperic Symfony Components • ClassLoader • Console • CssSelector • DependencyInjection • EventDispatcher • HttpFoundation • HttpKernel • Process • Routing • Serializer • Translation • Validator • Yaml
22. @antonioperic • HTTP Kernel • Request / Response • Controllers • Event Dispatching • Listeners / Subscribers Dependency injection container
23. @antonioperic Development environment
26. @antonioperic Or just use your Symfony development environment • PHP built-in server • Vagrant • Docker • …
27. @antonioperic Tools
28. @antonioperic Drush • update core and contrib • download modules • enable modules • clear cache • update db • run cron • import config • export config • create user • change password • one time login • backup drupal • restore drupal • compile twig templates *Type “drush” to get full list - www.drushcommands.com
34. @antonioperic Drupal Console • update core and contrib • download modules • enable modules • clear cache • update db • run cron • import config • export config • generate console command • generate entity • generate content type • generate modules • run unit test *Type “drupal list” to get full list - drupalconsole.com/docs
40. @antonioperic Installation
41. @antonioperic How to install Drupal8 • Drush • drush dl drupal • Composer • Download zip file
42. @antonioperic Lets use composer • drupal/drupal. • This uses Drupal itself as a template for the new site. It is the simplest solution but lacks additional configuration that can be helpful.
 
 • drupal-composer/drupal-project. • This open source project acts as a kickstarter for Composer-based Drupal sites. It provides default configuration that otherwise needs to be added manually.
43. @antonioperic Let’s use composer
44. @antonioperic Let’s use composer composer create-project drupal/drupal
46. @antonioperic Let’s use composer composer require drupal/<modulename> for example: composer require drupal/token
47. @antonioperic Run in browser
54. @antonioperic Add some content
56. drupal create:nodes
58. @antonioperic We have content but something is missing
60. @antonioperic WebProfiler
61. @antonioperic composer require drupal/devel
71. @antonioperic Under the Hood
79. @antonioperic Request -> Response
82. @antonioperic Pipeline 1. After the controller returned a render array, the VIEW will be triggered by the HttpKernel, because the controller result is not a Response, but a render array. 2. MainContentViewSubscriber is subscribed to the VIEW event. It checks whether the controller result is an array, and if so, it guarantees to generate a Response. 3. Next, MainContentViewSubscriber checks whether the negotiated request format is supported: 1. Any format for which a main content renderer service exists (an implementation of MainContentRendererInterface is supported. 2. If the negotiated request format is not supported, a 406 JSON response is generated, which lists the supported formats in a machine-readable way (as per RFC 2616, section 10.4.7). 4. Otherwise, when the negotiated request format is supported, the corresponding main content renderer service is initialized. A response is generated by calling MainContentRendererInterface::renderResponse() on the service. That's it
83. @antonioperic Main Content Renderes HTML: HtmlRenderer (text/html) AJAX: AjaxRenderer (application/vnd.drupal-ajax) Dialog: DialogRenderer (application/vnd.drupal-dialog) Modal: ModalRenderer (application/vnd.drupal-modal)
86. @antonioperic Routing
88. @antonioperic Controllers
94. @antonioperic Services
97. @antonioperic Events / Listeners
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99. @antonioperic Registering event subscribers Here are the steps to register an event subscriber: Define a service in your module, tagged with 'event_subscriber' (see the Services topic for instructions). Define a class for your subscriber service that implements \Symfony\Component\EventDispatcher\EventSubscriberInterface In your class, the getSubscribedEvents method returns a list of the events this class is subscribed to, and which methods on the class should be called for each one. Example: public static function getSubscribedEvents() { // Subscribe to kernel terminate with priority 100. $events[KernelEvents::TERMINATE][] = array('onTerminate', 100); // Subscribe to kernel request with default priority of 0. $events[KernelEvents::REQUEST][] = array('onRequest'); return $events; }
100. @antonioperic Building Custom Module
 HelloPHPUK
123. @antonioperic Recap • Symfony components are main building tool for D8 • DIC is backbone of Drupal • DI for controllers is very easy • Events are replacing hooks • Building custom module is easy • Hardest thing is to start • This is just beginning there is a lot to learn about and from D8
124. @antonioperic Thank you! antonio@locastic.com @antonioperic www.locastic.com