I got my some custom classes in my vendor folder which I use in my Symfony project. Now I need to access some parameters from my parameters.yml which is located in
C:\xampp\htdocs\myproject\app\config\parameters.yml
In my regular Symfony code I just do
$this->getParameter('myparameter');
and all set, but not in vendor folder. I guess I need to import some namespaces, but could not find which?
Any help would be appreciated. Thank you.
UPD1 The issue was solved by adding the following code to AppBundle.php
class AppBundle extends Bundle
{
private static $containerInstance = null;
public function setContainer(\Symfony\Component\DependencyInjection\ContainerInterface $container = null)
{
parent::setContainer($container);
self::$containerInstance = $container;
}
public static function getContainer()
{
return self::$containerInstance;
}
}
and then calling the container from my vendor code with the following:
use AppBundle\AppBundle;
AppBundle::getContainer()->getParameter('myparameter');
Thanks everyone for help.
DependencyInjection/YourBundleExtension.php
$container->setParameter('myparameter', $config);
https://symfony.com/doc/current/create_framework/dependency_injection.html#main
After that, add this config to your service (for example)
Resources/config/services.yml
services:
your.service:
class: App\YourBundle\Service\YourService
arguments:
- %myparameter%
You can either define your services in
C:\xampp\htdocs\myproject\app\config\services.yml
The Resources\config directory of a bundle. See How to Load Service Configuration inside a Bundle.
You simply define your services by giving them a name, specifying the class and then listing any arguments the class has to be injected into it when it is instantiated. To reference a parameter from parameters.yml you wrap the name of the parameter in %% as I did below.
services:
my_project.some_service:
class: Vendor\Class\Name\Here
arguments: ['%some.parameter.name%']
In 99% of scenarios you definitely should not inject the dependency injection container into your own classes. Having your classes depend on the container is not good - have them depend on other services from your project or simple values such as strings, integers etc.
Related
I want to pass the EntityManager instance into the constructor of my controller, using this code:
namespace AppBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Doctrine\ORM\EntityManager;
class UserController extends Controller
{
public function __construct( EntityManager $entityManager )
{
// do some stuff with the entityManager
}
}
I do the constructor injection by putting the parameters into the service.yml file:
parameters:
# parameter_name: value
services:
# service_name:
# class: AppBundle\Directory\ClassName
# arguments: ["#another_service_name", "plain_value", "%parameter_name%"]
app.user_controller:
class: AppBundle\Controller\UserController
arguments: ['#doctrine.orm.entity_manager']
the service.yml is included in the config.yml and when I run
php bin/console debug:container app.user_controller
I get:
Information for Service "app.user_controller"
=============================================
------------------ -------------------------------------
Option Value
------------------ -------------------------------------
Service ID app.user_controller
Class AppBundle\Controller\UserController
Tags -
Public yes
Synthetic no
Lazy no
Shared yes
Abstract no
Autowired no
Autowiring Types -
------------------ -------------------------------------
However, calling a route which is mapped to my controller, I get:
FatalThrowableError in UserController.php line 17: Type error:
Argument 1 passed to
AppBundle\Controller\UserController::__construct() must be an instance
of Doctrine\ORM\EntityManager, none given, called in
/home/michel/Documents/Terminfinder/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
on line 202
I cant figure out, why the EntityManager is not getting injected?
When using the base classController.php the Container is usually auto-wired by the framework in theControllerResolver.
Basically you are trying to mix up how things actually work.
To solve your problem you basically have two solutions:
Do no try to inject the dependency but fetch it directly from the Container from within your action/method.
public function listUsers(Request $request)
{
$em = $this->container->get('doctrine.orm.entity_manager');
}
Create a controller manually but not extend the Controller base class; and set ip up as a service
To go a bit further on this point, some people will advise to do not use the default Controller provided by Symfony.
While I totally understand their point of view, I'm slightly more moderated on the subject.
The idea behind injecting only the required dependencies is to avoid and force people to have thin controller, which is a good thing.
However, with a little of auto-determination, using the existing shortcut is much simpler.
A Controller / Action is nothing more but the glue between your Views and your Domain/Models.
Prevent yourself from doing too much in your Controller using the ContainerAware facility.
A Controller can thrown away without generate business changes in your system.
Since 2017 and Symfony 3.3+, there is native support for controllers as services.
You can keep your controller the way it is, since you're using constructor injection correctly.
Just modify your services.yml:
# app/config/services.yml
services:
_defaults:
autowire: true
AppBundle\:
resouces: ../../src/AppBundle
It will:
load all controllers and repositories as services
autowire contructor dependencies (in your case EntityManager)
Step further: repositories as services
Ther were many question on SO regarding Doctrine + repository + service + controller, so I've put down one general answer to a post. Definitelly check if you prefer constructor injection and services over static and service locators.
Did you use following pattern to call the controller AppBundle:Default:index? if yes that should be the problem. If you want to use controller as a service you have to use the pattern: app.controller_id:indexAction which uses the id of the service to load the controller.
Otherwise it will try to create an instance of the class without using the service container.
For more information see the symfony documentation about this topic https://symfony.com/doc/current/controller/service.html
The entity manager is available in a controller without needing to inject it. All it takes is:
$em = $this->getDoctrine()->getManager();
i searh and read a lot of same question but ever i got the same error :/
I create a service:
parameters:
tbackend.report.class: T\BackendBundle\Entity\Report
services:
tbackend.entity.report:
class: %tbackend.report.class%
arguments: ["%kernel.root_dir%"]
And i has this in T\BackendBundle\Entity\Report:
public function __construct($rootDir){
$this->rootDir = $rootDir;
}
When i try to create new Report(); i receive this msg:
Warning: Missing argument 1 for T\BackendBundle\Entity\Report::__construct(), called in /var/www/test/t_study/src/T/BackendBundle/Entity/ReportRepository.php on line 62 and defined
Considerations: i know the services.yml is called, i has more services in this file and all work ok (Loginhandlers, etc), i only add one more (tbackend.entity.report)
What is wrong with that? :( I dont know if need more for know about the problem. I follow symfony2 service container guide
http://symfony.com/doc/master/book/service_container.html
Basically I try not to use DIR in the Entity when moving files
Ty
When instantiating a class, you use normal PHP. Symfony isn't some magic that hooks into the instantiating process of PHP to automatically inject things in the constructor.
If you want to get a service, you either have to inject the service in the class you need it or you have the containe rin the class (for instance, in the controller) and retrieve the service from the container.
$report = $this->container->get('tbackend.entity.report');
or: (which is a much better practice in all cases except from controllers)
class WhereINeedTheReport
{
private $report;
public function __construct(Report $report)
{
$this->report = $report;
}
}
services:
# ...
where_i_need_the_report:
class: ...
arguments: ["#tbackend.entity.report"]
I need a way to override the basic path() function in twig.
I have a twig extension already, but defining a path filter there did not do the trick for me.
Thanks in advance.
Extend the default routing extension class.
use Symfony\Bridge\Twig\Extension\RoutingExtension;
class MyRoutingExtension extends RoutingExtension
{
public function getPath($name, $parameters = array(), $relative = false)
{
//some code
}
}
Then specify your class using a parameter:
parameters:
twig.extension.routing.class: MyNamespace\MyRoutingExtension
======================================================================
To inject more dependencies such as the domain you basically need to copy the service definition and then add your stuff:
# services.yml
twig.extension.routing:
class: '%twig.extension.routing.class%'
public: false
arguments:
- '#router'
- 'domain'
class MyRoutingExtension extends RoutingExtension
{
protected $domain;
public function __construct($router,$domain)
{
parent::__construct($router);
$this->domain = $domain;
}
}
You could also add the argument to the service definition from inside of your DependencyInjection extension. That might be a bit more robust that copying the service definition. There is always the risk that the definition might change if symfony is updated. Unlikely. I don't happen to have an example handy.
By the way, you should probably avoid adding a question to an existing question. Some of the down voters will take a dim view.
I'm trying to get the root dir in symfony2.
If I use:
$this->get('kernel')->getRootDir();
I get this error:
FatalErrorException: Error: Call to undefined method Test\Component\ClassLoader\DebugClassLoader::get()
How can I fix this?
Edit, seeing as this post has garnered so much attention and mine is at the top, the best way to get the root directory is to pass it in to your class as a constructor argument. You would use services.yml to do this, and in arguments:
serviceName:
class: Name\Of\Your\Service
arguments: %kernel.root_dir%
Then, the following code will have the root directory given to it when the framework instantiates it:
namespace Name\Of\Your;
class Service
{
public function __construct($rootDir)
{
// $rootDir is the root directory passed in for you
}
}
The rest of the answer below is the old, poor way of doing it without using Dependency Injection.
I want to make everyone aware that this is the Service Locator, which is an anti-pattern. Any developer should be able to see what a class, or controller, requires to function from the method signature only. Injecting a whole "container" is very generic, hard to debug and isn't the best way of doing things. You should use a Dependency Injection Container that allows you to inject specifically what you want anywhere in your application. Be specific. Check out a seriously awesome recursively instantiating dependency injection container called Auryn. Where your framework resolves your controller / action, place it there and use the container to create the controller and run the method instead. Boom! Instant SOLID code.
You're correct, the service container is accessed using $this->get('service').
However, in order to use $this->get(), you're going to need access to the get() method.
Controller Access
You gain access to this, and many other handy methods, by making sure your controller extends the base controller class that Symfony uses.
Make sure you're referencing the correct Controller base class:
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
class HelloController extends Controller
{
/** The Kernel should now be accessible via the container **/
$root = $this->get('kernel')->getRootDir();
}
Service Access
If you want to access the container from a service, you're going to have to define your controller as a service. You can find more information in this post, this post and this post about how to do this. Another useful link. Either way, you now know what to look for. This post may also be useful:
use Symfony\Component\DependencyInjection\ContainerInterface;
class MyClass
{
private $container;
public function __construct(ContainerInterface $container)
{
$this->container = $container;
}
public function doWhatever()
{
/** Your container is now in $this->container **/
$root = $this->container->get('kernel')->getRootDir();
}
}
In your config.yml, define your new type:
myclass:
class: ...\MyClass
arguments: ["#service_container"]
You can read more about the service container in the docs.
The parameter kernel.root_dir points to the app directory. Normally to get to the root directory, I user kernel.root_dir/../
So in controller you can use $this->container->getParameter('kernel.root_dir')."/../"
In service definition you can use:
my_service:
class: \Path\to\class
arguments: [%kernel.root_dir%/../]
The best option is to declare tour class as a service in your services.yml file:
services:
myclass:
class: Your\Class\Namespace\MyClass
arguments: ["#service_container"]
and adapt yhe constructor of you class:
use Symfony\Component\DependencyInjection\ContainerInterface
class MyClass
{
private $container;
public function __construct(ContainerInterface $container)
{
$this->container = $container;
}
}
In a Symfony2 project, when you use a Controller, you can access Doctrine by calling getDoctrine() on this, i.e.:
$this->getDoctrine();
In this way, I can access the repository of such a Doctrine Entity.
Suppose to have a generic PHP class in a Symfony2 project. How can I retrieve Doctrine ?
I suppose that there is such a service to get it, but I don't know which one.
You can register this class as a service and inject whatever other services into it. Suppose you have GenericClass.php as follows:
class GenericClass
{
public function __construct()
{
// some cool stuff
}
}
You can register it as service (in your bundle's Resources/config/service.yml|xml usually) and inject Doctrine's entity manager into it:
services:
my_mailer:
class: Path/To/GenericClass
arguments: [doctrine.orm.entity_manager]
And it'll try to inject entity manager to (by default) constructor of GenericClass. So you just have to add argument for it:
public function __construct($entityManager)
{
// do something awesome with entity manager
}
If you are not sure what services are available in your application's DI container, you can find out by using command line tool: php app/console container:debug and it'll list all available services along with their aliases and classes.
After checking the symfony2 docs i figured out how to pass your service
in a custom method to break the default behavior.
Rewrite your configs like this:
services:
my_mailer:
class: Path/To/GenericClass
calls:
- [anotherMethodName, [doctrine.orm.entity_manager]]
So, the Service is now available in your other method.
public function anotherMethodName($entityManager)
{
// your magic
}
The Answer from Ondrej is absolutely correct, I just wanted to add this piece of the puzzle to this thread.