Symfony2 è sicuramente uno dei framework migliori in circolazione, ma non sono tutte rose e fiori, soprattutto per chi inizia a sviluppare ed è alle prime armi. In questa presentazione vorrei condividere la mie esperienza di apprendimento ed utilizzo del framework, cercando di mettere in evidenza i miei momenti wtf e alcune linee guida per sviluppare applicazioni manutenibili

1. My
Symfony
WTF

2. Michele Orselli
CTO@Ideato
@_orso_
mo@ideato.it
Who am I?

3. Why a talk on WTF?
why a talk on WTF?

4. I♥
why a talk on WTF?

5. but...
why a talk on WTF?

6. why a talk on WTF?

7. why a talk on WTF?

8. why a talk on WTF?

9. why a talk on WTF?

10. symfony 1 was focused on
Rapid Application Development
the (old) times?

11. Symfony2 is focused on
Application Development
the shiny new thing

12. the shiny new thing

13. the shiny new thing

14. the shiny new thing

15. speed as selling point

16. create-project symfony/framework-standard-edition ./foo 2.3.0
installation

17. cache/log permissions

18. cache/log permissions

19. php app/console cache:clear
cache/log permissions

20. cache/log permissions

21. cache all the things (in dev too)!

22. http://symfony.com/doc/current/book/templating.html
cache all the things (in dev too)!

23. config.yml:
twig:
cache:
false
user session in cache!

24. uhm, wait a minute...

25. user session in cache!

26. capifony?
idephix? :-P
user session in cache!

27. config.yml:
framework:
session:
save_path: "%kernel.root_dir%/sessions/"
user session in cache!

28. sf2 in da cloud

29. sf2 in da cloud

30. http:/
/www.ideato.it/planet-ideato/symfony2-su-google-app-engine/
symfony2 needs a writable filesystem
symfony2 uses some restricted functions
you can warmup cache, but paths are absolute
the problem is not only limited to symfony (eg: assetic)
sf2 in da cloud

31. sf2 in da cloud

32. /**
* @ORMEntity(repositoryClass="IdeatoOfferBundleRepositoryCityRepository")
* @ORMTable(name="city")
*/
class City
{
/**
* @ORMId
* @ORMColumn(type="integer")
* @ORMGeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORMColumn(type="string", length=255)
* @AssertNotBlank()
*/
private $name;
annotations

33. use DoctrineORMMapping as ORM;
use SymfonyComponentValidatorConstraints as Assert;
/**
* @ORMEntity(repositoryClass="IdeatoOfferBundleRepositoryCityRepository")
* @ORMTable(name="city")
*/
class City
{
/**
* @ORMId
* @ORMColumn(type="integer")
* @ORMGeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @ORMColumn(type="string", length=255)
* @AssertNotBlank()
*/
private $name;
annotations

34. @ParamConverter
do you need everything?

35. /**
* @ParamConverter("post", class="SensioBlogBundle:Post")
*/
public function showAction(Post $post)
{
...
}
do you need everything?

36. /**
* @ParamConverter("post", class="SensioBlogBundle:Post")
*/
public function showAction(Post $post)
{
...
}
public function showAction(Post $post)
{
...
}
do you need everything?

37. /**
* @ParamConverter("post", class="SensioBlogBundle:Post")
*/
public function showAction(Post $post)
{
...
}
public function showAction(Post $post)
{
...
}
public function showAction(Post $post, Comment $comment)
{
...
}
do you need everything?

38. /**
* @ParamConverter("post", class="SensioBlogBundle:Post")
*/
public function showAction(Post $post)
{
...
}
public function showAction(Post $post)
{
...
}
public function showAction(Post $post, Comment $comment)
{
...
}
kill the magic?

39. public function showAction($post_id)
{
$post = $this->getRepository(‘Posts’)
->findOneById($post_id);
}
explicit vs implicit

40. use DoctrineDBALTypesType;
use DoctrineDBALPlatformsAbstractPlatform;
/**
* NewObject datatype
*/
class NewObjectType extends Type
{
public function convertToPHPValue($value, AbstractPlatform $platform)
{
$listeners = $platform -> getEventManager() -> getListeners('getContainer');
$listener = array_shift($listeners);
$container = $listener -> getContainer();
return $container -> get('service');
}
}
if u can it doesn’t mean you have to

41. class A
{
protected $first_service;
protected $second_service;
public function __construct(ContainerInterface $container)
{
$this->first_service = $container->get(‘firstService’);
$this->second_service = $container->get(‘secondService’);
}
}
passing around the DIC is bad

42. class A
{
protected $first_service;
protected $second_service;
public function __construct(FirstService $first, SecondService $second)
{
$this->first_service = $first;
$this->second_service = $second;
}
}
in services.yml:
services:
my.service:
arguments:
- "@first_service"
- "@second_service"
class: MyClassA
passing around the DIC is bad

43. everything is a bundle

44. mopa_bootstrap:
version:
~
form:
templating:
MopaBootstrapBundle:Form:fields.html.twig
horizontal_label_class: col-lg-3
horizontal_input_wrapper_class: col-lg-9
row_wrapper_class:
form-group
render_fieldset:
true
render_collection_item: true
show_legend:
true
show_child_legend:
false
checkbox_label:
both
render_optional_text: true
render_required_asterisk: false
error_type:
~
tooltip:
icon:
icon-info-sign
placement:
top
tabs:
class:
nav nav-tabs
popover:
icon:
icon-info-sign
placement:
top
collection:
widget_remove_btn:
attr:
class:
btn
icon:
~
icon_color:
~
widget_add_btn:
attr:
class:
btn
icon:
~
icon_color:
~
navbar:
template:
MopaBootstrapBundle:Navbar:navbar.html.twig
initializr:
meta:
title:
MopaBootstrapBundle
description:
MopaBootstrapBundle
keywords:
MopaBootstrapBundle, Twitter Bootstrap, HTML5 Boilerplate
author_name:
My name
author_url:
#
feed_atom:
~
feed_rss:
~
sitemap:
~
nofollow:
false
noindex:
false
dns_prefetch:
# Default:
- //ajax.googleapis.com
google:
wt:
~
analytics:
~
diagnostic_mode:
false
configuration (Mopa)...

45. fos_user:
db_driver:
~ # Required
user_class:
~ # Required
firewall_name:
~ # Required
model_manager_name:
~
use_listener:
true
use_username_form_type: true
from_email:
address:
webmaster@example.com
sender_name:
webmaster
profile:
form:
type:
fos_user_profile
name:
fos_user_profile_form
validation_groups:
# Defaults:
- Profile
- Default
change_password:
form:
type:
name:
validation_groups:
# Defaults:
- ChangePassword
- Default
registration:
confirmation:
enabled:
template:
from_email:
address:
sender_name:
form:
type:
name:
validation_groups:
fos_user_change_password
fos_user_change_password_form
false
FOSUserBundle:Registration:email.txt.twig
~ # Required
~ # Required
resetting:
token_ttl:
86400
email:
template:
FOSUserBundle:Resetting:email.txt.twig
from_email:
address:
~ # Required
sender_name:
~ # Required
form:
type:
fos_user_resetting
name:
fos_user_resetting_form
validation_groups:
# Defaults:
- ResetPassword
- Default
service:
mailer:
fos_user.mailer.default
email_canonicalizer: fos_user.util.canonicalizer.default
token_generator:
fos_user.util.token_generator.default
username_canonicalizer: fos_user.util.canonicalizer.default
user_manager:
fos_user.user_manager.default
template:
engine:
twig
group:
group_class:
~ # Required
group_manager:
fos_user.group_manager.default
form:
type:
fos_user_group
name:
fos_user_group_form
validation_groups:
# Defaults:
- Registration
- Default
fos_user_registration
fos_user_registration_form
# Defaults:
- Registration
- Default
configuration (FosUserBundle)...

46. configuration is just another way of
programming
configuration...

47. is there a way to create decoupled,
maintainable code?
configuration...

48. libraries
configuration...

49. src
!"" Acme
#"" CoreDomain
$
!"" User
$
#"" User.php
$
#"" UserId.php
$
!"" UserRepository.php
!"" CoreDomainBundle
#"" Repository
$ !"" InMemoryUserRepository.php
!"" AcmeCoreDomainBundle.php
http:/
/williamdurand.fr/2013/08/07
/ddd-with-symfony2-folder-structure-and-code-first/
http:/
/whitewashing.de
ddd, code first, ...

50. wrap up
Wrap up

51. after all Symfony2 is just a
framework
Wrap up

52. framework != architecture
Wrap up

53. do you need that feature?
Wrap up

54. think in advance
Wrap up

55. keep things decoupled
Wrap up

56. Thank you!
@_orso_
that’s all folks!
mo@ideato.it

57. Pics Credits
wtf per minute: http://www.codinghorror.com/blog/2009/02/whos-your-coding-buddy.html
pills: http://www.daygame.com/2013/blog/swallowing-the-red-pill/
umarell: http://www.informarexresistere.fr/
clouds: http://www.flickr.com/photos/uncle_jerry/49341110/
gae: http://venturebeat.files.wordpress.com/2013/05/google-app-engine-php-zend.jpg
that’s all folks!